<SEC-DOCUMENT>0000917225-18-000017.txt : 20180502
<SEC-HEADER>0000917225-18-000017.hdr.sgml : 20180502
<ACCEPTANCE-DATETIME>20180502170537
ACCESSION NUMBER:		0000917225-18-000017
CONFORMED SUBMISSION TYPE:	10-Q
PUBLIC DOCUMENT COUNT:		51
CONFORMED PERIOD OF REPORT:	20180331
FILED AS OF DATE:		20180502
DATE AS OF CHANGE:		20180502

FILER:

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			SOLITARIO ZINC CORP.
		CENTRAL INDEX KEY:			0000917225
		STANDARD INDUSTRIAL CLASSIFICATION:	GOLD & SILVER ORES [1040]
		IRS NUMBER:				841285791
		STATE OF INCORPORATION:			CO
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		10-Q
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-32978
		FILM NUMBER:		18800597

	BUSINESS ADDRESS:	
		STREET 1:		4251 KIPLING STREET
		STREET 2:		SUITE 390
		CITY:			WHEAT RIDGE
		STATE:			CO
		ZIP:			80033
		BUSINESS PHONE:		3035341030

	MAIL ADDRESS:	
		STREET 1:		4251 KIPLING STREET
		STREET 2:		SUITE 390
		CITY:			WHEAT RIDGE
		STATE:			CO
		ZIP:			80033

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	SOLITARIO EXPLORATION & ROYALTY CORP.
		DATE OF NAME CHANGE:	20080616

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	SOLITARIO RESOURCES CORP
		DATE OF NAME CHANGE:	20000711
</SEC-HEADER>
<DOCUMENT>
<TYPE>10-Q
<SEQUENCE>1
<FILENAME>q12018.htm
<TEXT>
<HTML>
<HEAD>
<TITLE></TITLE>
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<BODY>


<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: center"><B>UNITED STATES SECURITIES AND EXCHANGE COMMISSION</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: center"><B>Washington, D.C. 20549</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: center"><B>&nbsp;</B></P>

<P STYLE="font: 12pt Times New Roman, Times, Serif; margin: 0; text-align: center"><B>FORM 10-Q</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify">&nbsp;(Mark One)</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 0 0 0.5in; text-align: justify; text-indent: -0.5in"><B>[X] QUARTERLY
REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 0 0 1in; text-align: center; text-indent: -67.5pt">For the quarterly
period ended<U>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<B>March 31, 2018&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</B></U></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: center">OR</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 0 0 0.5in; text-align: justify; text-indent: -0.5in"><B>[&nbsp;&nbsp;]
TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934&nbsp;&nbsp;</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 0 0 0.5in; text-align: center; text-indent: -0.5in">For the transition
period from<U>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</U>to<U>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</U></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: center">Commission File Number. &nbsp;&nbsp;<B><U>001-39278</U></B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify">&nbsp;</P>

<P STYLE="font: 12pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0; text-align: center"><B><U>SOLITARIO ZINC CORP.</U></B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0; text-align: center"><U>(Exact name of registrant as specified
in its charter)</U></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify">&nbsp;</P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="width: 100%; border-collapse: collapse">
<TR STYLE="vertical-align: top">
    <TD STYLE="width: 64%; padding-right: 5.4pt; padding-left: 5.4pt; font: 10pt Times New Roman, Times, Serif; layout-grid-mode: line"><B><U>Colorado </U></B><BR>
<B>(State or other jurisdiction of incorporation or organization) </B><U></U><BR>
<B><U>4251 Kipling St. Suite 390, Wheat Ridge, CO</U></B><BR>
<B>(Address of principal executive offices)</B><BR>
<B><U>(303)&nbsp; 534-1030</U></B><BR>
<B>(Registrant's telephone number, including area code)</B></TD>
    <TD STYLE="width: 36%; padding-right: 5.4pt; padding-left: 5.4pt; font: 10pt Times New Roman, Times, Serif; layout-grid-mode: line"><B><U>84-1285791 </U></B><BR>
<B>(I.R.S. Employer Identification No.</B><BR>
<B><U>80033</U></B><BR>
<B>(Zip Code)</B></TD></TR>
</TABLE>
<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 26.1pt 6pt 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 26.1pt 6pt 0">Indicate by checkmark whether the registrant (1) has
filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months
(or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements
for the past 90 days.</P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="width: 100%; border-collapse: collapse">
<TR STYLE="vertical-align: top">
    <TD STYLE="width: 23%; padding-right: 26.1pt; padding-left: 5.4pt; font: 10pt Times New Roman, Times, Serif; layout-grid-mode: line; text-align: center">YES
&nbsp;&nbsp;&nbsp;&#9746;</TD>
    <TD STYLE="width: 25%; padding-right: 26.1pt; padding-left: 5.4pt; font: 10pt Times New Roman, Times, Serif; layout-grid-mode: line; text-align: justify">&nbsp;</TD>
    <TD STYLE="width: 52%; padding-right: 26.1pt; padding-left: 5.4pt; font: 10pt Times New Roman, Times, Serif; layout-grid-mode: line; text-align: justify">NO
&nbsp;&nbsp;&nbsp;&#9744;</TD></TR>
</TABLE>
<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 26.1pt 0 0.25in">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 26.1pt 0 0">Indicate by check mark whether the registrant has submitted
electronically and posted on its corporate Web site, if any, every</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 26.1pt 0 0">Interactive Data File required to be submitted and posted
pursuant to Rule 405 of Regulation S-T (&sect;232.405 of this chapter) during the preceding 12 months (or for such shorter period
that the registrant was required to submit and post such files).</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 26.1pt 0 0.25in">&nbsp;</P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="font: 10pt Times New Roman, Times, Serif; width: 100%; border-collapse: collapse">
<TR STYLE="vertical-align: top">
    <TD STYLE="width: 23%; padding-right: 26.1pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: center">YES &nbsp;&nbsp;&nbsp;&#9746;</TD>
    <TD STYLE="width: 25%; padding-right: 26.1pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: justify">&nbsp;</TD>
    <TD STYLE="width: 52%; padding-right: 26.1pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: justify">NO &nbsp;&nbsp;&nbsp;&#9744;</TD></TR>
</TABLE>
<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 26.1pt 0 0.25in; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 26.1pt 0 0; text-align: justify">Indicate by check mark whether the
registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, smaller reporting company or an emerging
growth company. See the definitions of &#8220;large accelerated filer,&#8221; &#8220;accelerated filer,&#8221; &#8220;smaller reporting
company&#8221; and &#8220;emerging growth company&#8221; in Rule 12b-2 of the Exchange Act.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 26.1pt 0 0.25in; text-align: justify">&nbsp;</P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="font: 10pt Times New Roman, Times, Serif; width: 100%; border-collapse: collapse">
<TR STYLE="vertical-align: top">
    <TD STYLE="width: 17%; layout-grid-mode: line">Large accelerated filer&nbsp;&nbsp;&#9744;</TD>
    <TD STYLE="width: 17%; layout-grid-mode: line">Accelerated filer&nbsp;&nbsp;<FONT STYLE="font-family: Wingdings 2">&pound;</FONT></TD>
    <TD STYLE="width: 26%; layout-grid-mode: line">Non-accelerated filer<BR>
(do not check if a smaller <BR>
reporting company) <FONT STYLE="font-family: Wingdings 2">&#9744;</FONT></TD>
    <TD STYLE="width: 21%; layout-grid-mode: line">Smaller reporting company&nbsp;&nbsp;&#9746;</TD>
    <TD STYLE="width: 19%">
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0">Emerging Growth Company <FONT STYLE="font-family: Wingdings 2">&#9744;</FONT></P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0">&nbsp;</P></TD></TR>
</TABLE>
<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-indent: 40.5pt">Indicate by check mark whether the registrant
is a shell company (as defined in Rule 12b-2 of the Exchange Act).</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0">&nbsp;</P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="font: 10pt Times New Roman, Times, Serif; width: 100%">
<TR STYLE="vertical-align: top">
    <TD STYLE="width: 24%; padding-right: 26.1pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: center">YES &nbsp;&nbsp;&nbsp;<FONT STYLE="font-family: Wingdings 2">&#9744;</FONT></TD>
    <TD STYLE="width: 24%; padding-right: 26.1pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: justify">&nbsp;</TD>
    <TD STYLE="width: 52%; padding-right: 26.1pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: justify">NO &nbsp;&nbsp;&nbsp;&#9746;</TD></TR>
</TABLE>
<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify">&nbsp;There were 58,332,266 shares of $0.01
par value common stock outstanding as of May 01, 2018.</P>

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<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify"></P>




<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 12pt 0 3pt; text-align: center">TABLE OF CONTENTS</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0">&nbsp;</P>

<TABLE CELLPADDING="0" CELLSPACING="0" STYLE="border-collapse: collapse; width: 100%; font: 10pt Times New Roman, Times, Serif">
<TR STYLE="vertical-align: bottom">
    <TD STYLE="text-align: justify">PART 1 - FINANCIAL INFORMATION</TD><TD STYLE="font-weight: bold">&nbsp;</TD>
    <TD COLSPAN="3" STYLE="font-weight: bold; text-align: right">Page</TD></TR>
<TR STYLE="vertical-align: bottom">
    <TD STYLE="text-align: justify">&nbsp;</TD><TD>&nbsp;</TD>
    <TD COLSPAN="3" STYLE="text-align: right">&nbsp;</TD></TR>
<TR STYLE="vertical-align: bottom; background-color: rgb(204,238,255)">
    <TD STYLE="width: 70%; font-weight: bold; text-align: justify; padding-left: 5.4pt">Item 1&nbsp;&nbsp;&nbsp;&nbsp; Financial Statements</TD><TD STYLE="width: 10%">&nbsp;</TD>
    <TD STYLE="width: 1%; text-align: left">&nbsp;</TD><TD STYLE="width: 18%; text-align: right">3</TD><TD STYLE="width: 1%; text-align: left">&nbsp;</TD></TR>
<TR STYLE="vertical-align: bottom; background-color: White">
    <TD STYLE="text-align: justify; padding-left: 5.4pt">&nbsp;</TD><TD>&nbsp;</TD>
    <TD STYLE="text-align: left">&nbsp;</TD><TD STYLE="text-align: right">&nbsp;</TD><TD STYLE="text-align: left">&nbsp;</TD></TR>
<TR STYLE="vertical-align: bottom; background-color: rgb(204,238,255)">
    <TD STYLE="font-weight: bold; text-align: justify; padding-left: 5.4pt">Item 2&nbsp;&nbsp;&nbsp;&nbsp;Management's Discussion and Analysis of Financial</TD><TD>&nbsp;</TD>
    <TD STYLE="text-align: left">&nbsp;</TD><TD STYLE="text-align: right">&nbsp;</TD><TD STYLE="text-align: left">&nbsp;</TD></TR>
<TR STYLE="vertical-align: bottom; background-color: White">
    <TD STYLE="text-align: left; padding-left: 5.4pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<B>Condition and Results of Operations</B></TD><TD>&nbsp;</TD>
    <TD STYLE="text-align: left">&nbsp;</TD><TD STYLE="text-align: right">15</TD><TD STYLE="text-align: left">&nbsp;</TD></TR>
<TR STYLE="vertical-align: bottom; background-color: rgb(204,238,255)">
    <TD STYLE="text-align: justify; padding-left: 5.4pt">&nbsp;</TD><TD>&nbsp;</TD>
    <TD STYLE="text-align: left">&nbsp;</TD><TD STYLE="text-align: right">&nbsp;</TD><TD STYLE="text-align: left">&nbsp;</TD></TR>
<TR STYLE="vertical-align: bottom; background-color: White">
    <TD STYLE="font-weight: bold; text-align: justify; padding-left: 5.4pt">Item 3&nbsp;&nbsp;&nbsp;&nbsp;Quantitative and Qualitative Disclosures About Market Risk</TD><TD>&nbsp;</TD>
    <TD STYLE="text-align: left">&nbsp;</TD><TD STYLE="text-align: right">20</TD><TD STYLE="text-align: left">&nbsp;</TD></TR>
<TR STYLE="vertical-align: bottom; background-color: rgb(204,238,255)">
    <TD STYLE="text-align: justify; padding-left: 5.4pt">&nbsp;</TD><TD>&nbsp;</TD>
    <TD STYLE="text-align: left">&nbsp;</TD><TD STYLE="text-align: right">&nbsp;</TD><TD STYLE="text-align: left">&nbsp;</TD></TR>
<TR STYLE="vertical-align: bottom; background-color: White">
    <TD STYLE="font-weight: normal; text-align: justify; padding-left: 5.4pt">&nbsp;<B>Item 4&nbsp;&nbsp;&nbsp;&nbsp;Controls and Procedures</B></TD><TD>&nbsp;</TD>
    <TD STYLE="text-align: left">&nbsp;</TD><TD STYLE="text-align: right">21</TD><TD STYLE="text-align: left">&nbsp;</TD></TR>
<TR STYLE="vertical-align: bottom; background-color: rgb(204,238,255)">
    <TD STYLE="text-align: justify; padding-left: 5.4pt">&nbsp;</TD><TD>&nbsp;</TD>
    <TD STYLE="text-align: left">&nbsp;</TD><TD STYLE="text-align: right">&nbsp;</TD><TD STYLE="text-align: left">&nbsp;</TD></TR>
<TR STYLE="vertical-align: bottom; background-color: White">
    <TD STYLE="text-align: justify; padding-left: 5.4pt">PART II - OTHER INFORMATION</TD><TD>&nbsp;</TD>
    <TD STYLE="text-align: left">&nbsp;</TD><TD STYLE="text-align: right">&nbsp;</TD><TD STYLE="text-align: left">&nbsp;</TD></TR>
<TR STYLE="vertical-align: bottom; background-color: rgb(204,238,255)">
    <TD STYLE="text-align: justify; padding-left: 5.4pt">&nbsp;</TD><TD>&nbsp;</TD>
    <TD STYLE="text-align: left">&nbsp;</TD><TD STYLE="text-align: right">&nbsp;</TD><TD STYLE="text-align: left">&nbsp;</TD></TR>
<TR STYLE="vertical-align: bottom; background-color: White">
    <TD STYLE="font-weight: bold; text-align: justify; padding-left: 5.4pt">Item 1&nbsp;&nbsp;&nbsp;&nbsp;Legal Proceedings</TD><TD>&nbsp;</TD>
    <TD STYLE="text-align: left">&nbsp;</TD><TD STYLE="text-align: right">21</TD><TD STYLE="text-align: left">&nbsp;</TD></TR>
<TR STYLE="vertical-align: bottom; background-color: rgb(204,238,255)">
    <TD STYLE="text-align: justify; padding-left: 5.4pt">&nbsp;</TD><TD>&nbsp;</TD>
    <TD STYLE="text-align: left">&nbsp;</TD><TD STYLE="text-align: right">&nbsp;</TD><TD STYLE="text-align: left">&nbsp;</TD></TR>
<TR STYLE="vertical-align: bottom; background-color: White">
    <TD STYLE="font-weight: bold; text-align: justify; padding-left: 5.4pt">Item 1A&nbsp;&nbsp;&nbsp;Risk Factors</TD><TD>&nbsp;</TD>
    <TD STYLE="text-align: left">&nbsp;</TD><TD STYLE="text-align: right">21</TD><TD STYLE="text-align: left">&nbsp;</TD></TR>
<TR STYLE="vertical-align: bottom; background-color: rgb(204,238,255)">
    <TD STYLE="text-align: justify; padding-left: 5.4pt">&nbsp;</TD><TD>&nbsp;</TD>
    <TD STYLE="text-align: left">&nbsp;</TD><TD STYLE="text-align: right">&nbsp;</TD><TD STYLE="text-align: left">&nbsp;</TD></TR>
<TR STYLE="vertical-align: bottom; background-color: White">
    <TD STYLE="font-weight: bold; text-align: justify; padding-left: 5.4pt">Item 2&nbsp;&nbsp;&nbsp;&nbsp;Unregistered Sales of Equity Securities and Use of Proceeds</TD><TD>&nbsp;</TD>
    <TD STYLE="text-align: left">&nbsp;</TD><TD STYLE="text-align: right">21</TD><TD STYLE="text-align: left">&nbsp;</TD></TR>
<TR STYLE="vertical-align: bottom; background-color: rgb(204,238,255)">
    <TD STYLE="text-align: justify; padding-left: 5.4pt">&nbsp;</TD><TD>&nbsp;</TD>
    <TD STYLE="text-align: left">&nbsp;</TD><TD STYLE="text-align: right">&nbsp;</TD><TD STYLE="text-align: left">&nbsp;</TD></TR>
<TR STYLE="vertical-align: bottom; background-color: White">
    <TD STYLE="font-weight: bold; text-align: justify; padding-left: 5.4pt">Item 3&nbsp;&nbsp;&nbsp;&nbsp;Defaults Upon Senior Securities</TD><TD>&nbsp;</TD>
    <TD STYLE="text-align: left">&nbsp;</TD><TD STYLE="text-align: right">22</TD><TD STYLE="text-align: left">&nbsp;</TD></TR>
<TR STYLE="vertical-align: bottom; background-color: rgb(204,238,255)">
    <TD STYLE="text-align: justify; padding-left: 5.4pt">&nbsp;</TD><TD>&nbsp;</TD>
    <TD STYLE="text-align: left">&nbsp;</TD><TD STYLE="text-align: right">&nbsp;</TD><TD STYLE="text-align: left">&nbsp;</TD></TR>
<TR STYLE="vertical-align: bottom; background-color: White">
    <TD STYLE="font-weight: bold; text-align: justify; padding-left: 5.4pt">Item 4&nbsp;&nbsp;&nbsp;&nbsp;Mine Safety Disclosures</TD><TD>&nbsp;</TD>
    <TD STYLE="text-align: left">&nbsp;</TD><TD STYLE="text-align: right">22</TD><TD STYLE="text-align: left">&nbsp;</TD></TR>
<TR STYLE="vertical-align: bottom; background-color: rgb(204,238,255)">
    <TD STYLE="text-align: justify; padding-left: 5.4pt">&nbsp;</TD><TD>&nbsp;</TD>
    <TD STYLE="text-align: left">&nbsp;</TD><TD STYLE="text-align: right">&nbsp;</TD><TD STYLE="text-align: left">&nbsp;</TD></TR>
<TR STYLE="vertical-align: bottom; background-color: White">
    <TD STYLE="font-weight: bold; text-align: justify; padding-left: 5.4pt">Item 5&nbsp;&nbsp;&nbsp;&nbsp;Other Information</TD><TD>&nbsp;</TD>
    <TD STYLE="text-align: left">&nbsp;</TD><TD STYLE="text-align: right">22</TD><TD STYLE="text-align: left">&nbsp;</TD></TR>
<TR STYLE="vertical-align: bottom; background-color: rgb(204,238,255)">
    <TD STYLE="text-align: justify; padding-left: 5.4pt">&nbsp;</TD><TD>&nbsp;</TD>
    <TD STYLE="text-align: left">&nbsp;</TD><TD STYLE="text-align: right">&nbsp;</TD><TD STYLE="text-align: left">&nbsp;</TD></TR>
<TR STYLE="vertical-align: bottom; background-color: White">
    <TD STYLE="font-weight: bold; text-align: justify; padding-left: 5.4pt">Item 6&nbsp;&nbsp;&nbsp;&nbsp;Exhibits</TD><TD>&nbsp;</TD>
    <TD STYLE="text-align: left">&nbsp;</TD><TD STYLE="text-align: right">22</TD><TD STYLE="text-align: left">&nbsp;</TD></TR>
<TR STYLE="vertical-align: bottom; background-color: rgb(204,238,255)">
    <TD STYLE="text-align: justify; padding-left: 5.4pt">&nbsp;</TD><TD>&nbsp;</TD>
    <TD STYLE="text-align: left">&nbsp;</TD><TD STYLE="text-align: right">&nbsp;</TD><TD STYLE="text-align: left">&nbsp;</TD></TR>
<TR STYLE="vertical-align: bottom; background-color: White">
    <TD STYLE="text-align: justify; padding-left: 5.4pt">SIGNATURES</TD><TD>&nbsp;</TD>
    <TD STYLE="text-align: left">&nbsp;</TD><TD STYLE="text-align: right">23</TD><TD STYLE="text-align: left">&nbsp;</TD></TR>
<TR STYLE="vertical-align: bottom; background-color: rgb(204,238,255)">
    <TD STYLE="text-align: justify; padding-left: 5.4pt">&nbsp;</TD><TD>&nbsp;</TD>
    <TD STYLE="text-align: left">&nbsp;</TD><TD STYLE="text-align: right">&nbsp;</TD><TD STYLE="text-align: left">&nbsp;</TD></TR>
</TABLE>




<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: center"></P>

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<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: center">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: center"><U>PART I - FINANCIAL INFORMATION</U></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0">Item 1. <U>Financial Statements</U></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: center">SOLITARIO ZINC CORP.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: center">CONSOLIDATED BALANCE SHEETS</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: center">&nbsp;</P>

<TABLE CELLPADDING="0" CELLSPACING="0" STYLE="border-collapse: collapse; width: 100%; font: 10pt Times New Roman, Times, Serif">
<TR STYLE="vertical-align: bottom">
    <TD>(in thousands of U.S. dollars,</TD><TD>&nbsp;</TD>
    <TD COLSPAN="3" STYLE="text-align: center">March 31,</TD><TD>&nbsp;</TD>
    <TD COLSPAN="3" STYLE="text-align: center">December 31,</TD></TR>
<TR STYLE="vertical-align: bottom">
    <TD>except share and per share amounts)</TD><TD>&nbsp;</TD>
    <TD COLSPAN="3" STYLE="text-align: center">2018</TD><TD>&nbsp;</TD>
    <TD COLSPAN="3" STYLE="text-align: center">2017</TD></TR>
<TR STYLE="vertical-align: bottom">
    <TD>&nbsp;</TD><TD STYLE="padding-bottom: 1pt">&nbsp;</TD>
    <TD COLSPAN="3" STYLE="text-align: center; border-bottom: Black 1pt solid">(unaudited)</TD><TD STYLE="padding-bottom: 1pt">&nbsp;</TD>
    <TD COLSPAN="3" STYLE="text-align: center">&nbsp;</TD></TR>
<TR STYLE="vertical-align: bottom">
    <TD COLSPAN="9" STYLE="font-weight: normal; text-align: center">Assets</TD></TR>
<TR STYLE="vertical-align: bottom; background-color: rgb(204,238,255)">
    <TD STYLE="font-weight: bold; text-align: left; padding-left: 5.4pt">Current assets:</TD><TD>&nbsp;</TD>
    <TD STYLE="text-align: left">&nbsp;</TD><TD STYLE="text-align: right">&nbsp;</TD><TD STYLE="text-align: left">&nbsp;</TD><TD>&nbsp;</TD>
    <TD STYLE="text-align: left">&nbsp;</TD><TD STYLE="text-align: right">&nbsp;</TD><TD STYLE="text-align: left">&nbsp;</TD></TR>
<TR STYLE="vertical-align: bottom; background-color: White">
    <TD STYLE="width: 56%; text-align: left; padding-left: 5.4pt">&nbsp;&nbsp;Cash and cash equivalents</TD><TD STYLE="width: 8%">&nbsp;</TD>
    <TD STYLE="width: 1%; text-align: left">$</TD><TD STYLE="width: 12%; text-align: right">97</TD><TD STYLE="width: 1%; text-align: left">&nbsp;</TD><TD STYLE="width: 8%">&nbsp;</TD>
    <TD STYLE="width: 1%; text-align: left">$</TD><TD STYLE="width: 12%; text-align: right">214</TD><TD STYLE="width: 1%; text-align: left">&nbsp;</TD></TR>
<TR STYLE="vertical-align: bottom; background-color: rgb(204,238,255)">
    <TD STYLE="text-align: left; padding-left: 5.4pt">&nbsp;&nbsp;Short-term investments</TD><TD>&nbsp;</TD>
    <TD STYLE="text-align: left">&nbsp;</TD><TD STYLE="text-align: right">11,223</TD><TD STYLE="text-align: left">&nbsp;</TD><TD>&nbsp;</TD>
    <TD STYLE="text-align: left">&nbsp;</TD><TD STYLE="text-align: right">11,642</TD><TD STYLE="text-align: left">&nbsp;</TD></TR>
<TR STYLE="vertical-align: bottom; background-color: White">
    <TD STYLE="text-align: left; padding-left: 5.4pt">&nbsp;&nbsp;Investments in marketable equity securities, at fair value</TD><TD>&nbsp;</TD>
    <TD STYLE="text-align: left">&nbsp;</TD><TD STYLE="text-align: right">2,202</TD><TD STYLE="text-align: left">&nbsp;</TD><TD>&nbsp;</TD>
    <TD STYLE="text-align: left">&nbsp;</TD><TD STYLE="text-align: right">2,643</TD><TD STYLE="text-align: left">&nbsp;</TD></TR>
<TR STYLE="vertical-align: bottom; background-color: rgb(204,238,255)">
    <TD STYLE="text-align: left; padding-bottom: 1pt; padding-left: 5.4pt">&nbsp;&nbsp;Prepaid expenses and other</TD><TD STYLE="padding-bottom: 1pt">&nbsp;</TD>
    <TD STYLE="border-bottom: Black 1pt solid; text-align: left">&nbsp;</TD><TD STYLE="border-bottom: Black 1pt solid; text-align: right">93</TD><TD STYLE="padding-bottom: 1pt; text-align: left">&nbsp;</TD><TD STYLE="padding-bottom: 1pt">&nbsp;</TD>
    <TD STYLE="border-bottom: Black 1pt solid; text-align: left">&nbsp;</TD><TD STYLE="border-bottom: Black 1pt solid; text-align: right">114</TD><TD STYLE="padding-bottom: 1pt; text-align: left">&nbsp;</TD></TR>
<TR STYLE="vertical-align: bottom; background-color: White">
    <TD STYLE="font-weight: normal; text-align: left; padding-left: 5.4pt">&nbsp;&nbsp;&nbsp;&nbsp;Total current assets</TD><TD>&nbsp;</TD>
    <TD STYLE="text-align: left">&nbsp;</TD><TD STYLE="text-align: right">13,615</TD><TD STYLE="text-align: left">&nbsp;</TD><TD>&nbsp;</TD>
    <TD STYLE="text-align: left">&nbsp;</TD><TD STYLE="text-align: right">14,613</TD><TD STYLE="text-align: left">&nbsp;</TD></TR>
<TR STYLE="vertical-align: bottom; background-color: rgb(204,238,255)">
    <TD STYLE="padding-left: 5.4pt">&nbsp;</TD><TD>&nbsp;</TD>
    <TD STYLE="text-align: left">&nbsp;</TD><TD STYLE="text-align: right">&nbsp;</TD><TD STYLE="text-align: left">&nbsp;</TD><TD>&nbsp;</TD>
    <TD STYLE="text-align: left">&nbsp;</TD><TD STYLE="text-align: right">&nbsp;</TD><TD STYLE="text-align: left">&nbsp;</TD></TR>
<TR STYLE="vertical-align: bottom; background-color: White">
    <TD STYLE="font-weight: normal; text-align: left; padding-left: 5.4pt">Mineral properties</TD><TD>&nbsp;</TD>
    <TD STYLE="text-align: left">&nbsp;</TD><TD STYLE="text-align: right">15,657</TD><TD STYLE="text-align: left">&nbsp;</TD><TD>&nbsp;</TD>
    <TD STYLE="text-align: left">&nbsp;</TD><TD STYLE="text-align: right">15,657</TD><TD STYLE="text-align: left">&nbsp;</TD></TR>
<TR STYLE="vertical-align: bottom; background-color: rgb(204,238,255)">
    <TD STYLE="text-align: left; padding-bottom: 1pt; padding-left: 5.4pt">Other assets</TD><TD STYLE="padding-bottom: 1pt">&nbsp;</TD>
    <TD STYLE="border-bottom: Black 1pt solid; text-align: left">&nbsp;</TD><TD STYLE="border-bottom: Black 1pt solid; text-align: right">127</TD><TD STYLE="padding-bottom: 1pt; text-align: left">&nbsp;</TD><TD STYLE="padding-bottom: 1pt">&nbsp;</TD>
    <TD STYLE="border-bottom: Black 1pt solid; text-align: left">&nbsp;</TD><TD STYLE="border-bottom: Black 1pt solid; text-align: right">125</TD><TD STYLE="padding-bottom: 1pt; text-align: left">&nbsp;</TD></TR>
<TR STYLE="vertical-align: bottom; background-color: White">
    <TD STYLE="text-align: left; padding-bottom: 1pt; padding-left: 5.4pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<B>Total assets</B></TD><TD STYLE="padding-bottom: 1pt">&nbsp;</TD>
    <TD STYLE="border-bottom: Black 1pt solid; text-align: left">$</TD><TD STYLE="border-bottom: Black 1pt solid; text-align: right">29,399</TD><TD STYLE="padding-bottom: 1pt; text-align: left">&nbsp;</TD><TD STYLE="padding-bottom: 1pt">&nbsp;</TD>
    <TD STYLE="border-bottom: Black 1pt solid; text-align: left">$</TD><TD STYLE="border-bottom: Black 1pt solid; text-align: right">30,395</TD><TD STYLE="padding-bottom: 1pt; text-align: left">&nbsp;</TD></TR>
<TR STYLE="vertical-align: bottom; background-color: rgb(204,238,255)">
    <TD STYLE="padding-left: 5.4pt">&nbsp;</TD><TD>&nbsp;</TD>
    <TD STYLE="text-align: left">&nbsp;</TD><TD STYLE="text-align: right">&nbsp;</TD><TD STYLE="text-align: left">&nbsp;</TD><TD>&nbsp;</TD>
    <TD STYLE="text-align: left">&nbsp;</TD><TD STYLE="text-align: right">&nbsp;</TD><TD STYLE="text-align: left">&nbsp;</TD></TR>
<TR STYLE="vertical-align: bottom; background-color: White">
    <TD COLSPAN="9" STYLE="text-align: center">Liabilities and Shareholders&rsquo; Equity</TD></TR>
<TR STYLE="vertical-align: bottom; background-color: rgb(204,238,255)">
    <TD STYLE="font-weight: bold; text-align: left; padding-left: 5.4pt">Current liabilities:</TD><TD>&nbsp;</TD>
    <TD STYLE="text-align: left">&nbsp;</TD><TD STYLE="text-align: right">&nbsp;</TD><TD STYLE="text-align: left">&nbsp;</TD><TD>&nbsp;</TD>
    <TD STYLE="text-align: left">&nbsp;</TD><TD STYLE="text-align: right">&nbsp;</TD><TD STYLE="text-align: left">&nbsp;</TD></TR>
<TR STYLE="vertical-align: bottom; background-color: White">
    <TD STYLE="text-align: left; padding-left: 5.4pt">&nbsp;&nbsp;Accounts payable</TD><TD>&nbsp;</TD>
    <TD STYLE="text-align: left">$</TD><TD STYLE="text-align: right">165</TD><TD STYLE="text-align: left">&nbsp;</TD><TD>&nbsp;</TD>
    <TD STYLE="text-align: left">$</TD><TD STYLE="text-align: right">141</TD><TD STYLE="text-align: left">&nbsp;</TD></TR>
<TR STYLE="vertical-align: bottom; background-color: rgb(204,238,255)">
    <TD STYLE="padding-left: 5.4pt">&nbsp;</TD><TD>&nbsp;</TD>
    <TD STYLE="text-align: left">&nbsp;</TD><TD STYLE="text-align: right">&nbsp;</TD><TD STYLE="text-align: left">&nbsp;</TD><TD>&nbsp;</TD>
    <TD STYLE="text-align: left">&nbsp;</TD><TD STYLE="text-align: right">&nbsp;</TD><TD STYLE="text-align: left">&nbsp;</TD></TR>
<TR STYLE="vertical-align: bottom; background-color: White">
    <TD STYLE="font-weight: bold; text-align: left; padding-left: 5.4pt">Long-term liabilities</TD><TD>&nbsp;</TD>
    <TD STYLE="text-align: left">&nbsp;</TD><TD STYLE="text-align: right">&nbsp;</TD><TD STYLE="text-align: left">&nbsp;</TD><TD>&nbsp;</TD>
    <TD STYLE="text-align: left">&nbsp;</TD><TD STYLE="text-align: right">&nbsp;</TD><TD STYLE="text-align: left">&nbsp;</TD></TR>
<TR STYLE="vertical-align: bottom; background-color: rgb(204,238,255)">
    <TD STYLE="text-align: left; padding-left: 5.4pt">&nbsp;&nbsp;Asset retirement obligation &ndash; Lik</TD><TD>&nbsp;</TD>
    <TD STYLE="text-align: left">&nbsp;</TD><TD STYLE="text-align: right">125</TD><TD STYLE="text-align: left">&nbsp;</TD><TD>&nbsp;</TD>
    <TD STYLE="text-align: left">&nbsp;</TD><TD STYLE="text-align: right">125</TD><TD STYLE="text-align: left">&nbsp;</TD></TR>
<TR STYLE="vertical-align: bottom; background-color: White">
    <TD STYLE="padding-left: 5.4pt">&nbsp;</TD><TD>&nbsp;</TD>
    <TD STYLE="text-align: left">&nbsp;</TD><TD STYLE="text-align: right">&nbsp;</TD><TD STYLE="text-align: left">&nbsp;</TD><TD>&nbsp;</TD>
    <TD STYLE="text-align: left">&nbsp;</TD><TD STYLE="text-align: right">&nbsp;</TD><TD STYLE="text-align: left">&nbsp;</TD></TR>
<TR STYLE="vertical-align: bottom; background-color: rgb(204,238,255)">
    <TD STYLE="font-weight: bold; text-align: left; padding-left: 5.4pt">Commitments and contingencies</TD><TD>&nbsp;</TD>
    <TD STYLE="text-align: left">&nbsp;</TD><TD STYLE="text-align: right">&nbsp;</TD><TD STYLE="text-align: left">&nbsp;</TD><TD>&nbsp;</TD>
    <TD STYLE="text-align: left">&nbsp;</TD><TD STYLE="text-align: right">&nbsp;</TD><TD STYLE="text-align: left">&nbsp;</TD></TR>
<TR STYLE="vertical-align: bottom; background-color: White">
    <TD STYLE="padding-left: 5.4pt">&nbsp;</TD><TD>&nbsp;</TD>
    <TD STYLE="text-align: left">&nbsp;</TD><TD STYLE="text-align: right">&nbsp;</TD><TD STYLE="text-align: left">&nbsp;</TD><TD>&nbsp;</TD>
    <TD STYLE="text-align: left">&nbsp;</TD><TD STYLE="text-align: right">&nbsp;</TD><TD STYLE="text-align: left">&nbsp;</TD></TR>
<TR STYLE="vertical-align: bottom; background-color: rgb(204,238,255)">
    <TD STYLE="font-weight: bold; padding-left: 5.4pt">Equity:</TD><TD>&nbsp;</TD>
    <TD STYLE="text-align: left">&nbsp;</TD><TD STYLE="text-align: right">&nbsp;</TD><TD STYLE="text-align: left">&nbsp;</TD><TD>&nbsp;</TD>
    <TD STYLE="text-align: left">&nbsp;</TD><TD STYLE="text-align: right">&nbsp;</TD><TD STYLE="text-align: left">&nbsp;</TD></TR>
<TR STYLE="vertical-align: bottom; background-color: White">
    <TD STYLE="font-weight: bold; text-align: left; padding-left: 5.4pt">Shareholders&rsquo; equity:</TD><TD>&nbsp;</TD>
    <TD STYLE="text-align: left">&nbsp;</TD><TD STYLE="text-align: right">&nbsp;</TD><TD STYLE="text-align: left">&nbsp;</TD><TD>&nbsp;</TD>
    <TD STYLE="text-align: left">&nbsp;</TD><TD STYLE="text-align: right">&nbsp;</TD><TD STYLE="text-align: left">&nbsp;</TD></TR>
<TR STYLE="vertical-align: bottom; background-color: rgb(204,238,255)">
    <TD STYLE="text-align: left; padding-left: 5.4pt">&nbsp;&nbsp;&nbsp;Preferred stock, $0.01 par value, authorized 10,000,000<BR> &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;shares (none issued and outstanding at March 31, 2018 and <BR> &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;December 31, 2017)</TD><TD>&nbsp;</TD>
    <TD STYLE="text-align: left">&nbsp;</TD><TD STYLE="text-align: right">&mdash;&nbsp;&nbsp;</TD><TD STYLE="text-align: left">&nbsp;</TD><TD>&nbsp;</TD>
    <TD STYLE="text-align: left">&nbsp;</TD><TD STYLE="text-align: right">&mdash;&nbsp;&nbsp;</TD><TD STYLE="text-align: left">&nbsp;</TD></TR>
<TR STYLE="vertical-align: bottom; background-color: White">
    <TD STYLE="text-align: left; padding-left: 5.4pt">&nbsp;&nbsp;&nbsp;Common stock, $0.01 par value, authorized 100,000,000 shares<BR> &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(58,381,952 and 58,434,566 shares, respectively, issued <BR>and outstanding at March 31, 2018&nbsp;and December 31, 2017)</TD><TD>&nbsp;</TD>
    <TD STYLE="text-align: left">&nbsp;</TD><TD STYLE="text-align: right">584</TD><TD STYLE="text-align: left">&nbsp;</TD><TD>&nbsp;</TD>
    <TD STYLE="text-align: left">&nbsp;</TD><TD STYLE="text-align: right">584</TD><TD STYLE="text-align: left">&nbsp;</TD></TR>
<TR STYLE="vertical-align: bottom; background-color: rgb(204,238,255)">
    <TD STYLE="text-align: left; padding-left: 5.4pt">&nbsp;&nbsp;&nbsp;Additional paid-in capital</TD><TD>&nbsp;</TD>
    <TD STYLE="text-align: left">&nbsp;</TD><TD STYLE="text-align: right">69,296</TD><TD STYLE="text-align: left">&nbsp;</TD><TD>&nbsp;</TD>
    <TD STYLE="text-align: left">&nbsp;</TD><TD STYLE="text-align: right">69,312</TD><TD STYLE="text-align: left">&nbsp;</TD></TR>
<TR STYLE="vertical-align: bottom; background-color: White">
    <TD STYLE="text-align: left; padding-bottom: 1pt; padding-left: 5.4pt">&nbsp;&nbsp;&nbsp;Accumulated deficit</TD><TD STYLE="padding-bottom: 1pt">&nbsp;</TD>
    <TD STYLE="border-bottom: Black 1pt solid; text-align: left">&nbsp;</TD><TD STYLE="border-bottom: Black 1pt solid; text-align: right">(40,771</TD><TD STYLE="padding-bottom: 1pt; text-align: left">)</TD><TD STYLE="padding-bottom: 1pt">&nbsp;</TD>
    <TD STYLE="border-bottom: Black 1pt solid; text-align: left">&nbsp;</TD><TD STYLE="border-bottom: Black 1pt solid; text-align: right">(39,767</TD><TD STYLE="padding-bottom: 1pt; text-align: left">)</TD></TR>
<TR STYLE="vertical-align: bottom; background-color: rgb(204,238,255)">
    <TD STYLE="text-align: left; padding-bottom: 1pt; padding-left: 5.4pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Total shareholders&rsquo; equity</TD><TD STYLE="padding-bottom: 1pt">&nbsp;</TD>
    <TD STYLE="border-bottom: Black 1pt solid; text-align: left">&nbsp;</TD><TD STYLE="border-bottom: Black 1pt solid; text-align: right">29,109</TD><TD STYLE="padding-bottom: 1pt; text-align: left">&nbsp;</TD><TD STYLE="padding-bottom: 1pt">&nbsp;</TD>
    <TD STYLE="border-bottom: Black 1pt solid; text-align: left">&nbsp;</TD><TD STYLE="border-bottom: Black 1pt solid; text-align: right">30,129</TD><TD STYLE="padding-bottom: 1pt; text-align: left">&nbsp;</TD></TR>
<TR STYLE="vertical-align: bottom; background-color: White">
    <TD STYLE="font-weight: bold; text-align: left; padding-bottom: 1pt; padding-left: 5.4pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Total liabilities and shareholders&rsquo; equity</TD><TD STYLE="padding-bottom: 1pt">&nbsp;</TD>
    <TD STYLE="border-bottom: Black 1pt solid; text-align: left">$</TD><TD STYLE="border-bottom: Black 1pt solid; text-align: right">29,399</TD><TD STYLE="padding-bottom: 1pt; text-align: left">&nbsp;</TD><TD STYLE="padding-bottom: 1pt">&nbsp;</TD>
    <TD STYLE="border-bottom: Black 1pt solid; text-align: left">$</TD><TD STYLE="border-bottom: Black 1pt solid; text-align: right">30,395</TD><TD STYLE="padding-bottom: 1pt; text-align: left">&nbsp;</TD></TR>
</TABLE>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0">See Notes to Unaudited Condensed Consolidated Financial Statements</P>

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<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0"></P>




<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 17.1pt 0 0; text-align: center">SOLITARIO ZINC CORP.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 0.25in 0 0; text-align: center">CONSOLIDATED STATEMENTS OF OPERATIONS</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 0.25in 0 0; text-align: center">(Unaudited)</P>

<TABLE CELLPADDING="0" CELLSPACING="0" STYLE="border-collapse: collapse; width: 100%; font: 10pt Times New Roman, Times, Serif">
<TR STYLE="vertical-align: bottom">
    <TD>(in thousands of U.S. dollars, except per share amounts)</TD><TD>&nbsp;</TD>
    <TD COLSPAN="7" STYLE="text-align: center">Three months ended<BR> March 31</TD></TR>
<TR STYLE="vertical-align: bottom">
    <TD>&nbsp;</TD><TD STYLE="padding-bottom: 1pt">&nbsp;</TD>
    <TD COLSPAN="3" STYLE="text-align: center; border-bottom: Black 1pt solid">2018</TD><TD STYLE="padding-bottom: 1pt">&nbsp;</TD>
    <TD COLSPAN="3" STYLE="text-align: center; border-bottom: Black 1pt solid">2017</TD></TR>
<TR STYLE="vertical-align: bottom; background-color: rgb(204,238,255)">
    <TD STYLE="font-weight: bold; text-align: left; padding-left: 5.4pt">Costs, expenses and other:</TD><TD>&nbsp;</TD>
    <TD STYLE="text-align: left">&nbsp;</TD><TD STYLE="text-align: right">&nbsp;</TD><TD STYLE="text-align: left">&nbsp;</TD><TD>&nbsp;</TD>
    <TD STYLE="text-align: left">&nbsp;</TD><TD STYLE="text-align: right">&nbsp;</TD><TD STYLE="text-align: left">&nbsp;</TD></TR>
<TR STYLE="vertical-align: bottom; background-color: White">
    <TD STYLE="width: 56%; text-align: left; padding-left: 5.4pt">&nbsp;&nbsp;Exploration expense</TD><TD STYLE="width: 8%">&nbsp;</TD>
    <TD STYLE="width: 1%; text-align: left">$</TD><TD STYLE="width: 12%; text-align: right">180</TD><TD STYLE="width: 1%; text-align: left">&nbsp;</TD><TD STYLE="width: 8%">&nbsp;</TD>
    <TD STYLE="width: 1%; text-align: left">$</TD><TD STYLE="width: 12%; text-align: right">151</TD><TD STYLE="width: 1%; text-align: left">&nbsp;</TD></TR>
<TR STYLE="vertical-align: bottom; background-color: rgb(204,238,255)">
    <TD STYLE="text-align: left; padding-left: 5.4pt">&nbsp;&nbsp;Depreciation and amortization</TD><TD>&nbsp;</TD>
    <TD STYLE="text-align: left">&nbsp;</TD><TD STYLE="text-align: right">6</TD><TD STYLE="text-align: left">&nbsp;</TD><TD>&nbsp;</TD>
    <TD STYLE="text-align: left">&nbsp;</TD><TD STYLE="text-align: right">1</TD><TD STYLE="text-align: left">&nbsp;</TD></TR>
<TR STYLE="vertical-align: bottom; background-color: White">
    <TD STYLE="text-align: left; padding-bottom: 1pt; padding-left: 5.4pt">&nbsp;&nbsp;General and administrative</TD><TD STYLE="padding-bottom: 1pt">&nbsp;</TD>
    <TD STYLE="border-bottom: Black 1pt solid; text-align: left">&nbsp;</TD><TD STYLE="border-bottom: Black 1pt solid; text-align: right">403</TD><TD STYLE="padding-bottom: 1pt; text-align: left">&nbsp;</TD><TD STYLE="padding-bottom: 1pt">&nbsp;</TD>
    <TD STYLE="border-bottom: Black 1pt solid; text-align: left">&nbsp;</TD><TD STYLE="border-bottom: Black 1pt solid; text-align: right">300</TD><TD STYLE="padding-bottom: 1pt; text-align: left">&nbsp;</TD></TR>
<TR STYLE="vertical-align: bottom; background-color: rgb(204,238,255)">
    <TD STYLE="font-weight: bold; text-align: left; padding-left: 5.4pt">Total costs, expenses and other</TD><TD>&nbsp;</TD>
    <TD STYLE="text-align: left">&nbsp;</TD><TD STYLE="text-align: right">589</TD><TD STYLE="text-align: left">&nbsp;</TD><TD>&nbsp;</TD>
    <TD STYLE="text-align: left">&nbsp;</TD><TD STYLE="text-align: right">452</TD><TD STYLE="text-align: left">&nbsp;</TD></TR>
<TR STYLE="vertical-align: bottom; background-color: White">
    <TD STYLE="font-weight: bold; text-align: left; padding-left: 5.4pt">Other (loss) income</TD><TD>&nbsp;</TD>
    <TD STYLE="text-align: left">&nbsp;</TD><TD STYLE="text-align: right">&nbsp;</TD><TD STYLE="text-align: left">&nbsp;</TD><TD>&nbsp;</TD>
    <TD STYLE="text-align: left">&nbsp;</TD><TD STYLE="text-align: right">&nbsp;</TD><TD STYLE="text-align: left">&nbsp;</TD></TR>
<TR STYLE="vertical-align: bottom; background-color: rgb(204,238,255)">
    <TD STYLE="font-weight: normal; text-align: left; padding-left: 5.4pt">&nbsp;Interest income (net)</TD><TD>&nbsp;</TD>
    <TD STYLE="text-align: left">&nbsp;</TD><TD STYLE="text-align: right">26</TD><TD STYLE="text-align: left">&nbsp;</TD><TD>&nbsp;</TD>
    <TD STYLE="text-align: left">&nbsp;</TD><TD STYLE="text-align: right">46</TD><TD STYLE="text-align: left">&nbsp;</TD></TR>
<TR STYLE="vertical-align: bottom; background-color: White">
    <TD STYLE="text-align: left; padding-left: 5.4pt">&nbsp;Unrealized (loss) gain on marketable equity securities</TD><TD>&nbsp;</TD>
    <TD STYLE="text-align: left">&nbsp;</TD><TD STYLE="text-align: right">(441</TD><TD STYLE="text-align: left">)</TD><TD>&nbsp;</TD>
    <TD STYLE="text-align: left">&nbsp;</TD><TD STYLE="text-align: right">128</TD><TD STYLE="text-align: left">&nbsp;</TD></TR>
<TR STYLE="vertical-align: bottom; background-color: rgb(204,238,255)">
    <TD STYLE="text-align: left; padding-bottom: 1pt; padding-left: 5.4pt">&nbsp;Gain on derivative&nbsp;instruments</TD><TD STYLE="padding-bottom: 1pt">&nbsp;</TD>
    <TD STYLE="border-bottom: Black 1pt solid; text-align: left">&nbsp;</TD><TD STYLE="border-bottom: Black 1pt solid; text-align: right">&mdash;&nbsp;&nbsp;</TD><TD STYLE="padding-bottom: 1pt; text-align: left">&nbsp;</TD><TD STYLE="padding-bottom: 1pt">&nbsp;</TD>
    <TD STYLE="border-bottom: Black 1pt solid; text-align: left">&nbsp;</TD><TD STYLE="border-bottom: Black 1pt solid; text-align: right">172</TD><TD STYLE="padding-bottom: 1pt; text-align: left">&nbsp;</TD></TR>
<TR STYLE="vertical-align: bottom; background-color: White">
    <TD STYLE="font-weight: bold; text-align: left; padding-bottom: 1pt; padding-left: 5.4pt">Total other (loss) income</TD><TD STYLE="padding-bottom: 1pt">&nbsp;</TD>
    <TD STYLE="border-bottom: Black 1pt solid; text-align: left">&nbsp;</TD><TD STYLE="border-bottom: Black 1pt solid; text-align: right">(415</TD><TD STYLE="padding-bottom: 1pt; text-align: left">)</TD><TD STYLE="padding-bottom: 1pt">&nbsp;</TD>
    <TD STYLE="border-bottom: Black 1pt solid; text-align: left">&nbsp;</TD><TD STYLE="border-bottom: Black 1pt solid; text-align: right">346</TD><TD STYLE="padding-bottom: 1pt; text-align: left">&nbsp;</TD></TR>
<TR STYLE="vertical-align: bottom; background-color: rgb(204,238,255)">
    <TD STYLE="font-weight: bold; text-align: left; padding-bottom: 1pt; padding-left: 5.4pt">Net loss</TD><TD STYLE="padding-bottom: 1pt">&nbsp;</TD>
    <TD STYLE="border-bottom: Black 1pt solid; text-align: left">$</TD><TD STYLE="border-bottom: Black 1pt solid; text-align: right">(1,004</TD><TD STYLE="padding-bottom: 1pt; text-align: left">)</TD><TD STYLE="padding-bottom: 1pt">&nbsp;</TD>
    <TD STYLE="border-bottom: Black 1pt solid; text-align: left">$</TD><TD STYLE="border-bottom: Black 1pt solid; text-align: right">(106</TD><TD STYLE="padding-bottom: 1pt; text-align: left">)</TD></TR>
<TR STYLE="vertical-align: bottom; background-color: White">
    <TD STYLE="font-weight: bold; padding-left: 5.4pt">Loss per common share:</TD><TD>&nbsp;</TD>
    <TD STYLE="text-align: left">&nbsp;</TD><TD STYLE="text-align: right">&nbsp;</TD><TD STYLE="text-align: left">&nbsp;</TD><TD>&nbsp;</TD>
    <TD STYLE="text-align: left">&nbsp;</TD><TD STYLE="text-align: right">&nbsp;</TD><TD STYLE="text-align: left">&nbsp;</TD></TR>
<TR STYLE="vertical-align: bottom; background-color: rgb(204,238,255)">
    <TD STYLE="font-weight: bold; text-align: left; padding-left: 5.4pt">&nbsp;&nbsp;&nbsp;&nbsp;Basic and diluted</TD><TD>&nbsp;</TD>
    <TD STYLE="text-align: left">$</TD><TD STYLE="text-align: right">(0.02</TD><TD STYLE="text-align: left">)</TD><TD>&nbsp;</TD>
    <TD STYLE="text-align: left">$</TD><TD STYLE="text-align: right">(0.00</TD><TD STYLE="text-align: left">)</TD></TR>
<TR STYLE="vertical-align: bottom; background-color: White">
    <TD STYLE="font-weight: bold; padding-left: 5.4pt">Weighted average shares outstanding:</TD><TD>&nbsp;</TD>
    <TD STYLE="text-align: left">&nbsp;</TD><TD STYLE="text-align: right">&nbsp;</TD><TD STYLE="text-align: left">&nbsp;</TD><TD>&nbsp;</TD>
    <TD STYLE="text-align: left">&nbsp;</TD><TD STYLE="text-align: right">&nbsp;</TD><TD STYLE="text-align: left">&nbsp;</TD></TR>
<TR STYLE="vertical-align: bottom; background-color: rgb(204,238,255)">
    <TD STYLE="font-weight: bold; text-align: left; padding-left: 5.4pt">&nbsp;&nbsp;&nbsp;&nbsp;Basic and diluted</TD><TD>&nbsp;</TD>
    <TD STYLE="text-align: left">&nbsp;</TD><TD STYLE="text-align: right">58,444</TD><TD STYLE="text-align: left">&nbsp;</TD><TD>&nbsp;</TD>
    <TD STYLE="text-align: left">&nbsp;</TD><TD STYLE="text-align: right">38,692</TD><TD STYLE="text-align: left">&nbsp;</TD></TR>
<TR STYLE="vertical-align: bottom; background-color: White">
    <TD STYLE="padding-left: 5.4pt">&nbsp;</TD><TD>&nbsp;</TD>
    <TD STYLE="text-align: left">&nbsp;</TD><TD STYLE="text-align: right">&nbsp;</TD><TD STYLE="text-align: left">&nbsp;</TD><TD>&nbsp;</TD>
    <TD STYLE="text-align: left">&nbsp;</TD><TD STYLE="text-align: right">&nbsp;</TD><TD STYLE="text-align: left">&nbsp;</TD></TR>
</TABLE>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 0.25in 0 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 0.25in 0 0">See Notes to Unaudited Condensed Consolidated Financial
Statements</P>

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<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 0.25in 0 0"></P>




<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 0.25in 0 0; text-align: center">SOLITARIO ZINC CORP.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 0.25in 0 0; text-align: center">CONSOLIDATED STATEMENTS OF CASH FLOWS</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 0.25in 0 0; text-align: center">(Unaudited)</P>

<TABLE CELLPADDING="0" CELLSPACING="0" STYLE="border-collapse: collapse; width: 100%; font: 10pt Times New Roman, Times, Serif">
<TR STYLE="vertical-align: bottom">
    <TD>(in thousands of U.S. dollars)</TD><TD>&nbsp;</TD>
    <TD COLSPAN="7" STYLE="text-align: center">Three months ended<BR> March 31,</TD></TR>
<TR STYLE="vertical-align: bottom">
    <TD>&nbsp;</TD><TD STYLE="padding-bottom: 1pt">&nbsp;</TD>
    <TD COLSPAN="3" STYLE="text-align: center; border-bottom: Black 1pt solid">2018</TD><TD STYLE="padding-bottom: 1pt">&nbsp;</TD>
    <TD COLSPAN="3" STYLE="text-align: center; border-bottom: Black 1pt solid">2017</TD></TR>
<TR STYLE="vertical-align: bottom; background-color: rgb(204,238,255)">
    <TD STYLE="font-weight: bold; text-align: left; padding-left: 5.4pt">Operating activities:</TD><TD>&nbsp;</TD>
    <TD STYLE="text-align: left">&nbsp;</TD><TD STYLE="text-align: right">&nbsp;</TD><TD STYLE="text-align: left">&nbsp;</TD><TD>&nbsp;</TD>
    <TD STYLE="text-align: left">&nbsp;</TD><TD STYLE="text-align: right">&nbsp;</TD><TD STYLE="text-align: left">&nbsp;</TD></TR>
<TR STYLE="vertical-align: bottom; background-color: White">
    <TD STYLE="width: 56%; text-align: left; padding-left: 5.4pt">&nbsp;Net loss</TD><TD STYLE="width: 8%">&nbsp;</TD>
    <TD STYLE="width: 1%; text-align: left">$</TD><TD STYLE="width: 12%; text-align: right">(1,004</TD><TD STYLE="width: 1%; text-align: left">)</TD><TD STYLE="width: 8%">&nbsp;</TD>
    <TD STYLE="width: 1%; text-align: left">$</TD><TD STYLE="width: 12%; text-align: right">(106</TD><TD STYLE="width: 1%; text-align: left">)</TD></TR>
<TR STYLE="vertical-align: bottom; background-color: rgb(204,238,255)">
    <TD STYLE="text-align: left; padding-left: 5.4pt">&nbsp;Adjustments to reconcile net loss to net cash used in&nbsp;operating activities:</TD><TD>&nbsp;</TD>
    <TD STYLE="text-align: left">&nbsp;</TD><TD STYLE="text-align: right">&nbsp;</TD><TD STYLE="text-align: left">&nbsp;</TD><TD>&nbsp;</TD>
    <TD STYLE="text-align: left">&nbsp;</TD><TD STYLE="text-align: right">&nbsp;</TD><TD STYLE="text-align: left">&nbsp;</TD></TR>
<TR STYLE="vertical-align: bottom; background-color: White">
    <TD STYLE="padding-left: 5.4pt">&nbsp;</TD><TD>&nbsp;</TD>
    <TD STYLE="text-align: left">&nbsp;</TD><TD STYLE="text-align: right">&nbsp;</TD><TD STYLE="text-align: left">&nbsp;</TD><TD>&nbsp;</TD>
    <TD STYLE="text-align: left">&nbsp;</TD><TD STYLE="text-align: right">&nbsp;</TD><TD STYLE="text-align: left">&nbsp;</TD></TR>
<TR STYLE="vertical-align: bottom; background-color: rgb(204,238,255)">
    <TD STYLE="text-align: left; padding-left: 5.4pt">&nbsp;&nbsp;&nbsp;&nbsp;Depreciation and amortization</TD><TD>&nbsp;</TD>
    <TD STYLE="text-align: left">&nbsp;</TD><TD STYLE="text-align: right">6</TD><TD STYLE="text-align: left">&nbsp;</TD><TD>&nbsp;</TD>
    <TD STYLE="text-align: left">&nbsp;</TD><TD STYLE="text-align: right">1</TD><TD STYLE="text-align: left">&nbsp;</TD></TR>
<TR STYLE="vertical-align: bottom; background-color: White">
    <TD STYLE="text-align: left; padding-left: 5.4pt">&nbsp;&nbsp;&nbsp;&nbsp;Unrealized loss (gain) on sale of marketable equity securities</TD><TD>&nbsp;</TD>
    <TD STYLE="text-align: left">&nbsp;</TD><TD STYLE="text-align: right">441</TD><TD STYLE="text-align: left">&nbsp;</TD><TD>&nbsp;</TD>
    <TD STYLE="text-align: left">&nbsp;</TD><TD STYLE="text-align: right">(128</TD><TD STYLE="text-align: left">)</TD></TR>
<TR STYLE="vertical-align: bottom; background-color: rgb(204,238,255)">
    <TD STYLE="text-align: left; padding-left: 5.4pt">&nbsp;&nbsp;&nbsp;&nbsp;Employee stock option expense </TD><TD>&nbsp;</TD>
    <TD STYLE="text-align: left">&nbsp;</TD><TD STYLE="text-align: right">10</TD><TD STYLE="text-align: left">&nbsp;</TD><TD>&nbsp;</TD>
    <TD STYLE="text-align: left">&nbsp;</TD><TD STYLE="text-align: right">&mdash;&nbsp;&nbsp;</TD><TD STYLE="text-align: left">&nbsp;</TD></TR>
<TR STYLE="vertical-align: bottom; background-color: White">
    <TD STYLE="text-align: left; padding-left: 5.4pt">&nbsp;&nbsp;&nbsp;&nbsp;Unrealized (gain) on derivative instruments</TD><TD>&nbsp;</TD>
    <TD STYLE="text-align: left">&nbsp;</TD><TD STYLE="text-align: right">&mdash;&nbsp;&nbsp;</TD><TD STYLE="text-align: left">&nbsp;</TD><TD>&nbsp;</TD>
    <TD STYLE="text-align: left">&nbsp;</TD><TD STYLE="text-align: right">(172</TD><TD STYLE="text-align: left">)</TD></TR>
<TR STYLE="vertical-align: bottom; background-color: rgb(204,238,255)">
    <TD STYLE="text-align: left; padding-left: 5.4pt">&nbsp;&nbsp;&nbsp;&nbsp;Changes in operating assets and liabilities:</TD><TD>&nbsp;</TD>
    <TD STYLE="text-align: left">&nbsp;</TD><TD STYLE="text-align: right">&nbsp;</TD><TD STYLE="text-align: left">&nbsp;</TD><TD>&nbsp;</TD>
    <TD STYLE="text-align: left">&nbsp;</TD><TD STYLE="text-align: right">&nbsp;</TD><TD STYLE="text-align: left">&nbsp;</TD></TR>
<TR STYLE="vertical-align: bottom; background-color: White">
    <TD STYLE="text-align: left; padding-left: 5.4pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Prepaid expenses and other current assets</TD><TD>&nbsp;</TD>
    <TD STYLE="text-align: left">&nbsp;</TD><TD STYLE="text-align: right">32</TD><TD STYLE="text-align: left">&nbsp;</TD><TD>&nbsp;</TD>
    <TD STYLE="text-align: left">&nbsp;</TD><TD STYLE="text-align: right">32</TD><TD STYLE="text-align: left">&nbsp;</TD></TR>
<TR STYLE="vertical-align: bottom; background-color: rgb(204,238,255)">
    <TD STYLE="text-align: left; padding-bottom: 1pt; padding-left: 5.4pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Accounts payable and other current liabilities</TD><TD STYLE="padding-bottom: 1pt">&nbsp;</TD>
    <TD STYLE="border-bottom: Black 1pt solid; text-align: left">&nbsp;</TD><TD STYLE="border-bottom: Black 1pt solid; text-align: right">24</TD><TD STYLE="padding-bottom: 1pt; text-align: left">&nbsp;</TD><TD STYLE="padding-bottom: 1pt">&nbsp;</TD>
    <TD STYLE="border-bottom: Black 1pt solid; text-align: left">&nbsp;</TD><TD STYLE="border-bottom: Black 1pt solid; text-align: right">(12</TD><TD STYLE="padding-bottom: 1pt; text-align: left">)</TD></TR>
<TR STYLE="vertical-align: bottom; background-color: White">
    <TD STYLE="text-align: left; padding-bottom: 1pt; padding-left: 5.4pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Net cash used in operating activities</TD><TD STYLE="padding-bottom: 1pt">&nbsp;</TD>
    <TD STYLE="border-bottom: Black 1pt solid; text-align: left">&nbsp;</TD><TD STYLE="border-bottom: Black 1pt solid; text-align: right">(491</TD><TD STYLE="padding-bottom: 1pt; text-align: left">)</TD><TD STYLE="padding-bottom: 1pt">&nbsp;</TD>
    <TD STYLE="border-bottom: Black 1pt solid; text-align: left">&nbsp;</TD><TD STYLE="border-bottom: Black 1pt solid; text-align: right">(385</TD><TD STYLE="padding-bottom: 1pt; text-align: left">)</TD></TR>
<TR STYLE="vertical-align: bottom; background-color: rgb(204,238,255)">
    <TD STYLE="font-weight: bold; text-align: left; padding-left: 5.4pt">Investing activities:</TD><TD>&nbsp;</TD>
    <TD STYLE="text-align: left">&nbsp;</TD><TD STYLE="text-align: right">&nbsp;</TD><TD STYLE="text-align: left">&nbsp;</TD><TD>&nbsp;</TD>
    <TD STYLE="text-align: left">&nbsp;</TD><TD STYLE="text-align: right">&nbsp;</TD><TD STYLE="text-align: left">&nbsp;</TD></TR>
<TR STYLE="vertical-align: bottom; background-color: White">
    <TD STYLE="text-align: left; padding-left: 5.4pt">&nbsp;Sale of short-term investments, net</TD><TD>&nbsp;</TD>
    <TD STYLE="text-align: left">&nbsp;</TD><TD STYLE="text-align: right">408</TD><TD STYLE="text-align: left">&nbsp;</TD><TD>&nbsp;</TD>
    <TD STYLE="text-align: left">&nbsp;</TD><TD STYLE="text-align: right">246</TD><TD STYLE="text-align: left">&nbsp;</TD></TR>
<TR STYLE="vertical-align: bottom; background-color: rgb(204,238,255)">
    <TD STYLE="text-align: left; padding-left: 5.4pt">&nbsp;Purchase of other assets</TD><TD>&nbsp;</TD>
    <TD STYLE="text-align: left">&nbsp;</TD><TD STYLE="text-align: right">(8</TD><TD STYLE="text-align: left">)</TD><TD>&nbsp;</TD>
    <TD STYLE="text-align: left">&nbsp;</TD><TD STYLE="text-align: right">&mdash;&nbsp;&nbsp;</TD><TD STYLE="text-align: left">&nbsp;</TD></TR>
<TR STYLE="vertical-align: bottom; background-color: White">
    <TD STYLE="text-align: left; padding-left: 5.4pt">&nbsp;Proceeds from the sale of marketable equity securities</TD><TD>&nbsp;</TD>
    <TD STYLE="text-align: left">&nbsp;</TD><TD STYLE="text-align: right">&mdash;&nbsp;&nbsp;</TD><TD STYLE="text-align: left">&nbsp;</TD><TD>&nbsp;</TD>
    <TD STYLE="text-align: left">&nbsp;</TD><TD STYLE="text-align: right">259</TD><TD STYLE="text-align: left">&nbsp;</TD></TR>
<TR STYLE="vertical-align: bottom; background-color: rgb(204,238,255)">
    <TD STYLE="text-align: left; padding-left: 5.4pt">&nbsp;Purchase of marketable equity securities</TD><TD>&nbsp;</TD>
    <TD STYLE="text-align: left">&nbsp;</TD><TD STYLE="text-align: right">&mdash;&nbsp;&nbsp;</TD><TD STYLE="text-align: left">&nbsp;</TD><TD>&nbsp;</TD>
    <TD STYLE="text-align: left">&nbsp;</TD><TD STYLE="text-align: right">(167</TD><TD STYLE="text-align: left">)</TD></TR>
<TR STYLE="vertical-align: bottom; background-color: White">
    <TD STYLE="text-align: left; padding-bottom: 1pt; padding-left: 5.4pt">&nbsp;Sale of derivative instruments</TD><TD STYLE="padding-bottom: 1pt">&nbsp;</TD>
    <TD STYLE="border-bottom: Black 1pt solid; text-align: left">&nbsp;</TD><TD STYLE="border-bottom: Black 1pt solid; text-align: right">&mdash;&nbsp;&nbsp;</TD><TD STYLE="padding-bottom: 1pt; text-align: left">&nbsp;</TD><TD STYLE="padding-bottom: 1pt">&nbsp;</TD>
    <TD STYLE="border-bottom: Black 1pt solid; text-align: left">&nbsp;</TD><TD STYLE="border-bottom: Black 1pt solid; text-align: right">25</TD><TD STYLE="padding-bottom: 1pt; text-align: left">&nbsp;</TD></TR>
<TR STYLE="vertical-align: bottom; background-color: rgb(204,238,255)">
    <TD STYLE="text-align: left; padding-bottom: 1pt; padding-left: 5.4pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Net cash provided by investing activities</TD><TD STYLE="padding-bottom: 1pt">&nbsp;</TD>
    <TD STYLE="border-bottom: Black 1pt solid; text-align: left">&nbsp;</TD><TD STYLE="border-bottom: Black 1pt solid; text-align: right">400</TD><TD STYLE="padding-bottom: 1pt; text-align: left">&nbsp;</TD><TD STYLE="padding-bottom: 1pt">&nbsp;</TD>
    <TD STYLE="border-bottom: Black 1pt solid; text-align: left">&nbsp;</TD><TD STYLE="border-bottom: Black 1pt solid; text-align: right">363</TD><TD STYLE="padding-bottom: 1pt; text-align: left">&nbsp;</TD></TR>
<TR STYLE="vertical-align: bottom; background-color: White">
    <TD STYLE="font-weight: bold; text-align: left; padding-left: 5.4pt">Financing activities:</TD><TD>&nbsp;</TD>
    <TD STYLE="text-align: left">&nbsp;</TD><TD STYLE="text-align: right">&nbsp;</TD><TD STYLE="text-align: left">&nbsp;</TD><TD>&nbsp;</TD>
    <TD STYLE="text-align: left">&nbsp;</TD><TD STYLE="text-align: right">&nbsp;</TD><TD STYLE="text-align: left">&nbsp;</TD></TR>
<TR STYLE="vertical-align: bottom; background-color: rgb(204,238,255)">
    <TD STYLE="text-align: left; padding-bottom: 1pt; padding-left: 5.4pt">&nbsp;Purchase of common stock for cancellation</TD><TD STYLE="padding-bottom: 1pt">&nbsp;</TD>
    <TD STYLE="border-bottom: Black 1pt solid; text-align: left">&nbsp;</TD><TD STYLE="border-bottom: Black 1pt solid; text-align: right">(26</TD><TD STYLE="padding-bottom: 1pt; text-align: left">)</TD><TD STYLE="padding-bottom: 1pt">&nbsp;</TD>
    <TD STYLE="border-bottom: Black 1pt solid; text-align: left">&nbsp;</TD><TD STYLE="border-bottom: Black 1pt solid; text-align: right">(6</TD><TD STYLE="padding-bottom: 1pt; text-align: left">)</TD></TR>
<TR STYLE="vertical-align: bottom; background-color: White">
    <TD STYLE="text-align: left; padding-bottom: 1pt; padding-left: 5.4pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Net cash used in financing activities</TD><TD STYLE="padding-bottom: 1pt">&nbsp;</TD>
    <TD STYLE="border-bottom: Black 1pt solid; text-align: left">&nbsp;</TD><TD STYLE="border-bottom: Black 1pt solid; text-align: right">(26</TD><TD STYLE="padding-bottom: 1pt; text-align: left">)</TD><TD STYLE="padding-bottom: 1pt">&nbsp;</TD>
    <TD STYLE="border-bottom: Black 1pt solid; text-align: left">&nbsp;</TD><TD STYLE="border-bottom: Black 1pt solid; text-align: right">(6</TD><TD STYLE="padding-bottom: 1pt; text-align: left">)</TD></TR>
<TR STYLE="vertical-align: bottom; background-color: rgb(204,238,255)">
    <TD STYLE="padding-left: 5.4pt">&nbsp;</TD><TD>&nbsp;</TD>
    <TD STYLE="text-align: left">&nbsp;</TD><TD STYLE="text-align: right">&nbsp;</TD><TD STYLE="text-align: left">&nbsp;</TD><TD>&nbsp;</TD>
    <TD STYLE="text-align: left">&nbsp;</TD><TD STYLE="text-align: right">&nbsp;</TD><TD STYLE="text-align: left">&nbsp;</TD></TR>
<TR STYLE="vertical-align: bottom; background-color: White">
    <TD STYLE="text-align: left; padding-left: 5.4pt">Net decrease in cash and cash equivalents</TD><TD>&nbsp;</TD>
    <TD STYLE="text-align: left">&nbsp;</TD><TD STYLE="text-align: right">(117</TD><TD STYLE="text-align: left">)</TD><TD>&nbsp;</TD>
    <TD STYLE="text-align: left">&nbsp;</TD><TD STYLE="text-align: right">(28</TD><TD STYLE="text-align: left">)</TD></TR>
<TR STYLE="vertical-align: bottom; background-color: rgb(204,238,255)">
    <TD STYLE="font-weight: bold; text-align: left; padding-bottom: 1pt; padding-left: 5.4pt">Cash and cash equivalents, beginning of period</TD><TD STYLE="padding-bottom: 1pt">&nbsp;</TD>
    <TD STYLE="border-bottom: Black 1pt solid; text-align: left">&nbsp;</TD><TD STYLE="border-bottom: Black 1pt solid; text-align: right">214</TD><TD STYLE="padding-bottom: 1pt; text-align: left">&nbsp;</TD><TD STYLE="padding-bottom: 1pt">&nbsp;</TD>
    <TD STYLE="border-bottom: Black 1pt solid; text-align: left">&nbsp;</TD><TD STYLE="border-bottom: Black 1pt solid; text-align: right">119</TD><TD STYLE="padding-bottom: 1pt; text-align: left">&nbsp;</TD></TR>
<TR STYLE="vertical-align: bottom; background-color: White">
    <TD STYLE="font-weight: bold; text-align: left; padding-bottom: 1pt; padding-left: 5.4pt">Cash and cash equivalents, end of period</TD><TD STYLE="padding-bottom: 1pt">&nbsp;</TD>
    <TD STYLE="border-bottom: Black 1pt solid; text-align: left">$</TD><TD STYLE="border-bottom: Black 1pt solid; text-align: right">97</TD><TD STYLE="padding-bottom: 1pt; text-align: left">&nbsp;</TD><TD STYLE="padding-bottom: 1pt">&nbsp;</TD>
    <TD STYLE="border-bottom: Black 1pt solid; text-align: left">$</TD><TD STYLE="border-bottom: Black 1pt solid; text-align: right">91</TD><TD STYLE="padding-bottom: 1pt; text-align: left">&nbsp;</TD></TR>
</TABLE>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 0.25in 0 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 0.25in 0 0">See Notes to Unaudited Condensed Consolidated Financial
Statements</P>

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<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 0.25in 0 0"></P>




<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0; text-align: center">NOTES TO UNAUDITED CONDENSED CONSOLIDATED
FINANCIAL STATEMENTS</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0; text-align: center">(Unaudited)</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0"><B>1.&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Business
and Significant Accounting Policies</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0"><I>Business and company formation</I></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0; text-indent: 0.5in">Solitario Zinc Corp. (&#8220;Solitario,&#8221;
or the &#8220;Company&#8221;) is an exploration stage company as defined in Industry Guide 7, as issued by the United States Securities
and Exchange Commission (&#8220;SEC&#8221;). Solitario was incorporated in the state of Colorado on November 15, 1984 as a wholly-owned
subsidiary of Crown Resources Corporation (&quot;Crown&quot;). In July 1994, Solitario became a publicly traded company on the
Toronto Stock Exchange (the &quot;TSX&quot;) through its initial public offering. Solitario has been actively involved in mineral
exploration since 1993. Solitario&#8217;s primary business is to acquire exploration mineral properties or royalties and/or discover
economic deposits on its mineral properties and advance these deposits, either on its own or through joint ventures, up to the
development stage. At that point, or sometime prior to that point, Solitario would likely attempt to sell its mineral properties,
pursue their development either on its own, or through a joint venture with a partner that has expertise in mining operations,
or create a royalty with a third party that continues to advance the property. As a result of the Acquisition (defined below),
Solitario is now primarily focused on the acquisition and exploration of zinc-related exploration mineral properties. In addition
to focusing on its mineral exploration properties and the evaluation of mineral properties for acquisition or purchase of royalty
interests, Solitario also evaluates potential strategic transactions for the acquisition of new precious and base metal properties
and assets with exploration potential or business combinations that Solitario determines to be favorable to Solitario.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0; text-indent: 0.5in">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0; text-indent: 0.5in">Solitario has recorded revenue in
the past from the sale of mineral property, including the sale in 2015 of its former interest in Mount Hamilton LLC (&#8220;MH-LLC&#8221;)
the owner of its former Mt. Hamilton project (the &#8220;Mt. Hamilton Transaction&#8221;), and joint venture property payments
and the sale of a royalty on its former Mt. Hamilton project. Revenues from the sale or joint venture of properties or assets,
although significant when they occur, have not been a consistent annual source of revenue and would only occur in the future, if
at all, on an infrequent basis.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0; text-indent: 0.5in">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0; text-indent: 0.5in">Solitario currently considers its
carried interest in the Florida Canyon project and its interest in the Lik project to be its core mineral property assets. Solitario&#8217;s
joint venture partner is expected to continue the development and furtherance of the Florida Canyon project and Solitario will
monitor progress at Florida Canyon. Solitario is working with its 50% joint venture partner, Teck American Incorporated, a wholly-owned
subsidiary of Teck Resources Limited ( both companies referred to as &#8220;Teck&#8221;), in the Lik deposit to further the exploration
and evaluate potential development plans for the Lik project.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0; text-indent: 0.5in">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0; text-indent: 0.5in"><FONT STYLE="color: windowtext">As
of March 31, 2018, Solitario has significant balances of cash and short-term investments that Solitario anticipates using, in part,
to further the development of the Florida Canyon and Lik projects and to potentially acquire additional mineral property assets.
The</FONT> fluctuations in precious metal and other commodity prices contribute to a challenging environment for mineral exploration
and development, which has created opportunities as well as challenges for the potential acquisition of early-stage and advanced
mineral exploration projects or other related assets at potentially attractive terms.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0; text-indent: 0.5in">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0; text-indent: 0.5in">The accompanying interim condensed
consolidated financial statements of Solitario for the three months ended March 31, 2018 are unaudited and are prepared in accordance
with accounting principles generally accepted in the United States of America (&#8220;generally accepted accounting principles&#8221;).
They do not include all disclosures required by generally accepted accounting principles for annual financial statements, but in
the opinion of management, include all adjustments, consisting only of normal recurring items, necessary for a fair presentation.
Interim results are not necessarily indicative of results, which may be achieved in the future or for the full year ending December
31, 2018.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0; text-indent: 0.5in">These financial statements should
be read in conjunction with the financial statements and notes thereto which are included in Solitario&#8217;s Annual Report on
Form 10-K for the year ended December 31, 2017. The accounting policies set forth in those annual financial statements are the
same as the accounting policies utilized in the preparation of these financial statements, except as modified for appropriate interim
financial statement presentation.</P>

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<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0; text-indent: 0.5in">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0"><I>Recent Developments</I></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0"><U>Purchase of Zazu</U></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0; text-indent: 0.5in">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0; text-indent: 0.5in">On July 12, 2017, Solitario completed
the acquisition of Zazu Metals Corp. (&#8220;Zazu&#8221;) pursuant to a definitive arrangement agreement between Solitario and
Zazu whereby Solitario agreed to acquire all of the issued and outstanding common shares of Zazu (the &quot;Zazu Shares&quot;)
by way of a statutory plan of arrangement (the &quot;Arrangement&quot;) under the <I>Canada Business Corporations Act</I> (the
&#8220;Acquisition&#8221;). The Arrangement was approved by the Ontario (Canada) Superior Court of Justice on July 7, 2017. Per
the Arrangement, Solitario issued 19,788,177 shares of its common stock on July 12, 2017 in exchange for all of the issued and
outstanding Zazu Shares, which represented 0.3572 shares of Solitario common stock for each outstanding Zazu Share. Zazu had one
primary asset, its interest in the Lik project, and the Acquisition was treated as an asset purchase in accordance with ASU 2017-01
&#8220;Business Combinations.&#8221; Solitario granted stock options to acquire an aggregate of 1,782,428 shares of Solitario common
stock to Zazu option holders the (&#8220;Replacement Options&#8221;) in connection with the Acquisition. The total purchase price
of $16,110,000 was recorded during the year ended December 31, 2017.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0"><I>Financial reporting</I></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0; text-indent: 0.5in">The consolidated financial statements
include the accounts of Solitario and its wholly-owned subsidiaries. All significant intercompany accounts and transactions have
been eliminated in consolidation. The consolidated financial statements are prepared in accordance with accounting principles generally
accepted in the United States of America (&quot;generally accepted accounting principles&quot;) and are expressed in U.S. dollars.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0"><I>Revenue recognition</I></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0; text-indent: 0.5in">Solitario records delay rental payments
as revenue in the period received. Any payments received for the sale of property interests are recorded as a reduction of the
related property's capitalized cost. Proceeds which exceed the capitalized cost of the property without reserves are recognized
as revenue. Payments received on the sale of properties with reserves are recognized as revenue to the extent the proceeds exceed
the proportionate basis in the assets sold. There were no delay rentals in the periods presented.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0"><I>Use of estimates</I></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0; text-indent: 0.5in">The preparation of financial statements
in conformity with generally accepted accounting principles requires management to make estimates and assumptions that affect the
reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements
and the reported amounts of revenues and expenses during the reporting period. Actual results could differ from those estimates.
Some of the more significant estimates included in the preparation of Solitario's financial statements pertain to: (i) Solitario&#8217;s
carrying value of short-term investments; (ii) the recoverability of mineral properties related to its mineral exploration properties
and their future exploration potential; (iii) the fair value of stock option grants to employees, to officers and directors and
to others; (iv) the ability of Solitario to realize its deferred tax assets; and (v) Solitario's investment in marketable equity
securities.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0; text-indent: 0.5in">In performing its activities, Solitario
has incurred certain costs for mineral properties. The recovery of these costs is ultimately dependent upon the sale of mineral
property interests or the development of economically recoverable ore reserves and the ability of Solitario to obtain the necessary
permits and financing to successfully place the properties into production, and upon future profitable operations, none of which
is assured.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0"><I>Cash equivalents </I></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0; text-indent: 0.5in">Cash equivalents include investments
in highly liquid money-market securities with original maturities of three months or less when purchased. As of March 31, 2018,
a portion of Solitario&#8217;s cash and cash equivalents are held in brokerage accounts and foreign banks, which are not covered
under the Federal Deposit Insurance Corporation (&#8220;FDIC&#8221;) rules for the United States. At March 31, 2018, Solitario
holds short-term investments in United States Treasury securities (&#8220;USTS&#8221;) of $9,976,000.</P>

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<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0"><I>Short-term investments</I></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0"><I>&nbsp;</I></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0; text-indent: 0.5in">As of March 31, 2018, Solitario has
$9,976,000 of its current assets in USTS with maturities of 15 days to 21 months. The USTS are recorded at their fair value, based
upon quoted market prices. As of March 31, 2018, we have $1,247,000 in separate bank certificates of deposit (&#8220;CDs&#8221;)
each with a maximum value of $250,000, and each of which are covered by FDIC insurance to the full-face value of the CDs. At March
31, 2018, the CDs have maturities of between 4 and 15 months. Solitario&#8217;s short-term investments are recorded at their fair
value, based upon quoted market prices. The short-term investments are highly liquid and may be sold in their entirety at any time
at their quoted market price and are classified as a current asset.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0"><I>&nbsp;</I></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0"><I>Mineral properties </I></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0; text-indent: 0.5in">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0; text-indent: 0.5in">Solitario expenses all exploration
costs incurred on its mineral properties prior to the establishment of proven and probable reserves through the completion of a
feasibility study. Initial acquisition costs of Solitario&#8217;s mineral properties are capitalized. Solitario capitalizes all
of its development expenditures on its projects, subsequent to the completion of a feasibility study. Solitario regularly performs
evaluations of its investment in mineral properties to assess the recoverability and/or the residual value of its investments in
these assets. All long-lived assets are reviewed for impairment whenever events or circumstances change which indicate the carrying
amount of an asset may not be recoverable, utilizing established guidelines based upon undiscounted future net cash flows from
the asset or upon the determination that certain exploration properties do not have sufficient potential for economic mineralization.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0"><I>Derivative instruments</I></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0"><I>&nbsp;</I></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0; text-align: left; text-indent: 0.5in">Solitario accounts
for its derivative instruments in accordance with ASC 815, &quot;Accounting for Derivative Instruments and Hedging Activities&quot;
(&#8220;ASC 815&#8221;). Solitario has entered into covered calls from time to time on its investment in Kinross Gold Corporation
(&#8220;Kinross&#8221;) marketable equity securities. In addition, during 2017 and 2016, Solitario owned warrants exercisable to
acquire shares of Vendetta Mining Corp. (&#8220;Vendetta&#8221;) common stock (the &#8220;Vendetta Warrants&#8221;). Each Vendetta
warrant allowed Solitario to purchase one share of Vendetta common stock at a price of Cdn$0.10 per share for a period of two years.
Solitario has not designated its covered calls as hedging instruments and any changes in the fair value of the covered calls and
its Vendetta Warrants are recognized in the statement of operations in the period of the change as gain or loss on derivative instruments.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0"><I>Fair value</I></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0; text-indent: 0.5in">FASB ASC 820, &#8220;Fair Value Measurements
and Disclosures&#8221; (&#8220;ASC 820&#8221;), establishes a framework for measuring fair value and requires enhanced disclosures
about fair value measurements. ASC 820 clarifies that fair value is an exit price, representing the amount that would be received
to sell an asset or paid to transfer a liability in an orderly transaction between market participants. For certain of Solitario's
financial instruments, including cash and cash equivalents and accounts payable, the carrying amounts approximate fair value due
to their short-term maturities. Solitario's short-term investments in USTS and CDs, its marketable equity securities and any covered
call options against those marketable equity securities are carried at their estimated fair value based on quoted market prices.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0"><I>Marketable equity securities</I></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0; text-indent: 0.5in">Solitario's investments in marketable
equity securities are classified as available-for-sale and are carried at fair value, which is based upon quoted prices of the
securities owned. Solitario records investments in marketable equity securities as available-for-sale for investments in publicly
traded marketable equity securities for which it does not exercise significant control and where Solitario has no representation
on the board of directors of those companies and exercises no control over the management of those companies. The cost of marketable
equity securities sold is determined by the specific identification method. During the first three months of 2018 Solitario adopted
ASU 2016-01, &#8220;Financial Instruments &#8211; Recognition and Measurement of Financial Assets and Financial Liabilities (Topic
825)&#8221; (&#8220;ASU 2016-01&#8221;). In accordance with ASU 2016-01, changes in fair value are recorded in the consolidated
statement of operations during the period of the change. During the first three months of 2018 Solitario recorded a cumulative-effect
adjustment to the balance sheet as of the beginning of the fiscal year of adoption of ASU 2016-01. See Note 9, &#8220;Shareholders&#8217;
Equity and Other Comprehensive Income&#8221;, below. &#9;</P>

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<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0"></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0"><I>&nbsp;</I></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0"><I>Foreign exchange</I></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0; text-indent: 0.5in">The United States dollar is the functional
currency for all of Solitario's foreign subsidiaries. Although Solitario's South American exploration activities during 2017 and
the first quarter of 2018 have been conducted primarily in Peru, a portion of the payments under the land, leasehold and exploration
agreements of Solitario are denominated in United States dollars. Realized foreign currency gains and losses are included in the
results of operations in the period in which they occur.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0"><I>Income taxes</I></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0; text-indent: 0.5in">Solitario accounts for income taxes
in accordance with ASC 740, &#8220;Accounting for Income Taxes&#8221; (&#8220;ASC 740&#8221;). Under ASC 740, income taxes are
provided for the tax effects of transactions reported in the financial statements and consist of taxes currently due plus deferred
taxes related to certain income and expenses recognized in different periods for financial and income tax reporting purposes. Deferred
tax assets and liabilities represent the future tax return consequences of those differences, which will either be taxable or deductible
when the assets and liabilities are recovered or settled. Deferred taxes are also recognized for operating losses and tax credits
that are available to offset future taxable income and income taxes, respectively. A valuation allowance is provided if it is more
likely than not that some portion or all of the deferred tax assets will not be realized.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0"><I>Accounting for uncertainty in income taxes</I></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0; text-indent: 0.5in">ASC 740 clarifies the accounting
for uncertainty in income taxes recognized in a company's financial statements. ASC 740 prescribes a recognition threshold and
measurement attribute for the financial statement recognition and measurement of a tax position taken or expected to be taken in
a tax return. ASC 740 also provides guidance on derecognition, classification, interest and penalties, accounting in interim periods,
disclosure, and transition. ASC 740 provides that a company's tax position will be considered settled if the taxing authority has
completed its examination, the company does not plan to appeal, and it is remote that the taxing authority would reexamine the
tax position in the future. The provisions of ASC 740 had no effect on Solitario's financial position or results of operations.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0"><I>Earnings per share</I></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0; text-indent: 0.5in">The calculation of basic and diluted
earnings (loss) per share is based on the weighted average number of shares of common stock outstanding during the three months
ended March 31, 2018 and 2017. Potentially dilutive shares related to outstanding common stock options of 2,082,428 Solitario common
shares for the three months ended March 31, 2018 were excluded from the calculation of diluted earnings (loss) per share because
the effects were anti-dilutive. There were no similar potentially dilutive securities outstanding during the three months ended
March 31, 2017.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0.5in; text-indent: -0.5in">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0"><I>Employee stock compensation and incentive plans</I></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0; text-indent: 0.5in">Solitario classifies all of its stock
options as equity options in accordance with the provisions of ASC 718, &#8220;Compensation &#8211; Stock Compensation.&#8221;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0"><I>Recent accounting pronouncements</I></P>

<P STYLE="font: 12pt Times New Roman, Times, Serif; margin-right: 30.6pt; margin-left: 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0; text-indent: 0.5in">In February 2016, the FASB issued
ASU 2016-02, &#8220;Leases&#8221; (&#8220;ASU No. 2016-02&#8221;), which will require lessees to recognize a right-of-use asset
and a lease liability for all leases that are not short-term in nature. For a lessor, the accounting applied is also largely unchanged
from previous guidance. The new rules will be effective for Solitario in the first quarter of 2019. Solitario does not anticipate
early adoption. Solitario does not expect the adoption of ASU No. 2016-02 to materially change its current accounting methods and
therefore it does not expect the adoption to have a material impact on its consolidated financial position or results of operations.</P>

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<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0; text-indent: 0.5in">In January 2016 the FASB issued ASU
No 2016-01<I>.</I> ASU No. 2016-01 revises the classification and measurement of investment in certain equity investments and the
presentation of certain fair value changes for certain financial liabilities measured at fair value. ASU No. 2016-01 requires the
change in fair value of many equity investments to be recognized in net income. ASU No. 2016-01 is effective for interim and annual
periods beginning after December 15, 2017, with early adoption permitted. Solitario adopted ASU No. 2016-01 in the first quarter
of 2018. Solitario recorded a cumulative-effect adjustment for the change in accounting principle to retained earnings of $576,000
related to the adoption of ASU 2016-01. See Note 9, &#8220;Shareholders&#8217; Equity and Accumulated Other Comprehensive Income,&#8221;
below.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0.5in; text-indent: -0.5in"><B>&nbsp;</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0; text-indent: 0.5in">In February 2018, the FASB issued
ASU No. 2018-02, &#8220;Reclassification of Certain Tax Effects from Accumulated Other Comprehensive Income&#8221; (ASU 2018-02),
which allows for a reclassification from accumulated other comprehensive income or loss to retained earnings or accumulated deficit
for stranded tax effects resulting from the Tax Cuts and Jobs Act of 2017 (&#8220;TCJA&#8221;). ASU 2018-02 also requires certain
related disclosures. ASU 2018-02 is effective for annual periods, and interim periods within those annual periods, beginning after
December 15, 2018 and should be applied either in the period of adoption or retrospectively to each period in which the effect
of the change in the U.S. federal corporate income tax rate in the TCJA is recognized. Early adoption is permitted. Solitario is
currently evaluating the impact of ASU 2018-02&nbsp;but&nbsp;does not believe it will have a material effect on Solitario&#8217;s
financial position or results of operations.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0.5in; text-indent: -0.5in"><B>&nbsp;</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0.5in; text-indent: -0.5in"><B>2.&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Mineral
Property</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0.5in; text-indent: -0.5in">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0">The following table details Solitario&#8217;s investment
in Mineral Property:</P>

<TABLE CELLPADDING="0" CELLSPACING="0" STYLE="border-collapse: collapse; width: 100%; font: 10pt Times New Roman, Times, Serif">
<TR STYLE="vertical-align: bottom">
    <TD>(in thousands)</TD><TD>&nbsp;</TD>
    <TD COLSPAN="7" STYLE="text-align: center">March 31,</TD></TR>
<TR STYLE="vertical-align: bottom">
    <TD>&nbsp;</TD><TD STYLE="padding-bottom: 1pt">&nbsp;</TD>
    <TD COLSPAN="3" STYLE="text-align: center; border-bottom: Black 1pt solid">2018</TD><TD STYLE="padding-bottom: 1pt">&nbsp;</TD>
    <TD COLSPAN="3" STYLE="text-align: center; border-bottom: Black 1pt solid">2017</TD></TR>
<TR STYLE="vertical-align: bottom">
    <TD>Exploration</TD><TD>&nbsp;</TD>
    <TD COLSPAN="3" STYLE="text-align: right">&nbsp;</TD><TD>&nbsp;</TD>
    <TD COLSPAN="3" STYLE="text-align: right">&nbsp;</TD></TR>
<TR STYLE="vertical-align: bottom; background-color: rgb(204,238,255)">
    <TD STYLE="width: 56%; text-align: left; padding-left: 5.4pt">&nbsp;&nbsp;&nbsp;Lik project (Alaska &ndash; US)</TD><TD STYLE="width: 8%">&nbsp;</TD>
    <TD STYLE="width: 1%; text-align: left">$</TD><TD STYLE="width: 12%; text-align: right">15,611</TD><TD STYLE="width: 1%; text-align: left">&nbsp;</TD><TD STYLE="width: 8%">&nbsp;</TD>
    <TD STYLE="width: 1%; text-align: left">$</TD><TD STYLE="width: 12%; text-align: right">15,611</TD><TD STYLE="width: 1%; text-align: left">&nbsp;</TD></TR>
<TR STYLE="vertical-align: bottom; background-color: White">
    <TD STYLE="text-align: left; padding-left: 5.4pt">&nbsp;&nbsp;&nbsp;La Promesa (Peru)</TD><TD>&nbsp;</TD>
    <TD STYLE="text-align: left">&nbsp;</TD><TD STYLE="text-align: right">6</TD><TD STYLE="text-align: left">&nbsp;</TD><TD>&nbsp;</TD>
    <TD STYLE="text-align: left">&nbsp;</TD><TD STYLE="text-align: right">6</TD><TD STYLE="text-align: left">&nbsp;</TD></TR>
<TR STYLE="vertical-align: bottom; background-color: rgb(204,238,255)">
    <TD STYLE="text-align: left; padding-bottom: 1pt; padding-left: 5.4pt">&nbsp;&nbsp;&nbsp;Montana Royalty property (US)</TD><TD STYLE="padding-bottom: 1pt">&nbsp;</TD>
    <TD STYLE="border-bottom: Black 1pt solid; text-align: left">&nbsp;</TD><TD STYLE="border-bottom: Black 1pt solid; text-align: right">40</TD><TD STYLE="padding-bottom: 1pt; text-align: left">&nbsp;</TD><TD STYLE="padding-bottom: 1pt">&nbsp;</TD>
    <TD STYLE="border-bottom: Black 1pt solid; text-align: left">&nbsp;</TD><TD STYLE="border-bottom: Black 1pt solid; text-align: right">40</TD><TD STYLE="padding-bottom: 1pt; text-align: left">&nbsp;</TD></TR>
<TR STYLE="vertical-align: bottom; background-color: White">
    <TD STYLE="text-align: left; padding-bottom: 1pt; padding-left: 5.4pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Total exploration mineral property</TD><TD STYLE="padding-bottom: 1pt">&nbsp;</TD>
    <TD STYLE="border-bottom: Black 1pt solid; text-align: left">$</TD><TD STYLE="border-bottom: Black 1pt solid; text-align: right">15,657</TD><TD STYLE="padding-bottom: 1pt; text-align: left">&nbsp;</TD><TD STYLE="padding-bottom: 1pt">&nbsp;</TD>
    <TD STYLE="border-bottom: Black 1pt solid; text-align: left">$</TD><TD STYLE="border-bottom: Black 1pt solid; text-align: right">15,657</TD><TD STYLE="padding-bottom: 1pt; text-align: left">&nbsp;</TD></TR>
<TR STYLE="vertical-align: bottom; background-color: rgb(204,238,255)">
    <TD>&nbsp;</TD><TD>&nbsp;</TD>
    <TD STYLE="text-align: left">&nbsp;</TD><TD STYLE="text-align: right">&nbsp;</TD><TD STYLE="text-align: left">&nbsp;</TD><TD>&nbsp;</TD>
    <TD STYLE="text-align: left">&nbsp;</TD><TD STYLE="text-align: right">&nbsp;</TD><TD STYLE="text-align: left">&nbsp;</TD></TR>
</TABLE>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0; text-indent: 0.5in">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0; text-indent: 0.5in">All exploration costs on our exploration
properties, none of which have proven and probable reserves, including any additional costs incurred for subsequent lease payments
or exploration activities related to our projects are expensed as incurred.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0.5in; text-indent: -0.5in"><U>Exploration expense</U></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0">The following items comprised exploration expense:</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0">&nbsp;</P>

<TABLE CELLPADDING="0" CELLSPACING="0" STYLE="border-collapse: collapse; width: 100%; font: 10pt Times New Roman, Times, Serif">
<TR STYLE="vertical-align: bottom">
    <TD STYLE="border-bottom: Black 1pt solid">(in thousands)</TD><TD STYLE="padding-bottom: 1pt">&nbsp;</TD>
    <TD COLSPAN="7" STYLE="text-align: center; border-bottom: Black 1pt solid">Three months ended<BR> &nbsp;March 31,</TD></TR>
<TR STYLE="vertical-align: bottom">
    <TD>&nbsp;</TD><TD STYLE="padding-bottom: 1pt">&nbsp;</TD>
    <TD COLSPAN="3" STYLE="text-align: center; border-bottom: Black 1pt solid">2018</TD><TD STYLE="padding-bottom: 1pt">&nbsp;</TD>
    <TD COLSPAN="3" STYLE="text-align: center; border-bottom: Black 1pt solid">2017</TD></TR>
<TR STYLE="vertical-align: bottom; background-color: rgb(204,238,255)">
    <TD STYLE="width: 56%; text-align: left; padding-left: 5.4pt">Geologic and field expenses</TD><TD STYLE="width: 8%">&nbsp;</TD>
    <TD STYLE="width: 1%; text-align: left">$</TD><TD STYLE="width: 12%; text-align: right">24</TD><TD STYLE="width: 1%; text-align: left">&nbsp;</TD><TD STYLE="width: 8%">&nbsp;</TD>
    <TD STYLE="width: 1%; text-align: left">$</TD><TD STYLE="width: 12%; text-align: right">22</TD><TD STYLE="width: 1%; text-align: left">&nbsp;</TD></TR>
<TR STYLE="vertical-align: bottom; background-color: White">
    <TD STYLE="padding-bottom: 1pt; padding-left: 5.4pt">Administrative</TD><TD STYLE="padding-bottom: 1pt">&nbsp;</TD>
    <TD STYLE="border-bottom: Black 1pt solid; text-align: left">&nbsp;</TD><TD STYLE="border-bottom: Black 1pt solid; text-align: right">156</TD><TD STYLE="padding-bottom: 1pt; text-align: left">&nbsp;</TD><TD STYLE="padding-bottom: 1pt">&nbsp;</TD>
    <TD STYLE="border-bottom: Black 1pt solid; text-align: left">&nbsp;</TD><TD STYLE="border-bottom: Black 1pt solid; text-align: right">129</TD><TD STYLE="padding-bottom: 1pt; text-align: left">&nbsp;</TD></TR>
<TR STYLE="vertical-align: bottom; background-color: rgb(204,238,255)">
    <TD STYLE="text-align: left; padding-bottom: 1pt; padding-left: 5.4pt">Total exploration costs</TD><TD STYLE="padding-bottom: 1pt">&nbsp;</TD>
    <TD STYLE="border-bottom: Black 1pt solid; text-align: left">$</TD><TD STYLE="border-bottom: Black 1pt solid; text-align: right">180</TD><TD STYLE="padding-bottom: 1pt; text-align: left">&nbsp;</TD><TD STYLE="padding-bottom: 1pt">&nbsp;</TD>
    <TD STYLE="border-bottom: Black 1pt solid; text-align: left">$</TD><TD STYLE="border-bottom: Black 1pt solid; text-align: right">151</TD><TD STYLE="padding-bottom: 1pt; text-align: left">&nbsp;</TD></TR>
</TABLE>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0"><U>Asset Retirement Obligation</U></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0; text-indent: 0.5in">In connection with the Acquisition,
Solitario recorded an asset retirement obligation of $125,000 for Solitario&#8217;s estimated reclamation cost of the existing
disturbance at the Lik project. This disturbance consists of an exploration camp including certain drill sites and access roads
at the camp. The estimate was based upon estimated cash costs for reclamation as determined by the permitting bond required by
the State of Alaska, for which Solitario has purchased a reclamation bond insurance policy in the event Solitario or its 50% partner,
Teck, do not complete required reclamation.</P>

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<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0"></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0; text-indent: 0.5in">Solitario has not applied a discount
rate to the recorded asset retirement obligation as the estimated time frame for reclamation is not currently known, as reclamation
is not expected to occur until the end of the Lik project life, which would follow future development and operations, the start
of which cannot be estimated or assured at this time. Additionally, no depreciation will be recorded on the related asset for
the asset retirement obligation until the Lik project goes into operation, which cannot be assured.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0"><B>3. &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Marketable
Equity Securities</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0; text-indent: 0.5in">Solitario's investments in marketable
equity securities are classified as available-for-sale and are carried at fair value, which is based upon quoted prices of the
securities owned. The cost of marketable equity securities sold is determined by the specific identification method. Changes in
market value are recorded in the consolidated statement of operations. During the three months ended March 31, 2018, Solitario
recorded an unrealized loss on marketable equity securities of $441,000. During the three months ended March 31, 2017, Solitario
recorded an unrealized gain on marketable equity securities of $128,000.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0; text-indent: 0.5in">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0; text-indent: 0.5in">On May 2, 2016 Solitario purchased
7,240,000 units of Vendetta for aggregate consideration of $289,000. Each unit included one common share of Vendetta and one Vendetta
Warrant. The total purchase price for the units of $289,000 was allocated between the Vendetta common shares and the Vendetta Warrants
based upon total fair values on the date of purchase. The Vendetta common shares were allocated a purchase cost of $186,000 and
the Vendetta Warrants were allocated a purchase cost of $103,000. During the three months ended March 31, 2017, Solitario sold
1,480,000 common shares of Vendetta for proceeds of $259,000, and a recorded cost of $38,000. In addition, during the three months
ended March 31, 2017 Solitario exercised 2,240,000 of the Vendetta Warrants it held and received 2,240,000 Vendetta common shares,
by paying $167,000 (Cdn$224,000) to Vendetta. The cost of the common shares received from the exercise of the Vendetta Warrants
was recorded based upon the total of the (i) exercise price of the Vendetta Warrants exercised, $167,000, and (ii) the fair value
of the Vendetta Warrants on the date of exercise, which equaled their intrinsic value, $309,000, for a total value of $476,000.
During 2017, subsequent to March 31, 2017, Solitario exercised its remaining 5,000,000 Vendetta Warrants by paying $441,000 and
owns 11,000,000 common shares of Vendetta and no Vendetta Warrants as of March 31, 2018 and December 31, 2017.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0; text-indent: 0.5in">The following tables summarize Solitario&#8217;s
marketable equity securities and adjustments to fair value:</P>

<TABLE CELLPADDING="0" CELLSPACING="0" STYLE="border-collapse: collapse; width: 100%; font: 10pt Times New Roman, Times, Serif">
<TR STYLE="vertical-align: bottom">
    <TD STYLE="text-align: justify; border-bottom: Black 1pt solid">(in thousands)</TD><TD STYLE="padding-bottom: 1pt">&nbsp;</TD>
    <TD COLSPAN="3" STYLE="text-align: center; border-bottom: Black 1pt solid">March 31, &nbsp;&nbsp;&nbsp;&nbsp;2018</TD><TD STYLE="padding-bottom: 1pt">&nbsp;</TD>
    <TD COLSPAN="3" STYLE="text-align: center; border-bottom: Black 1pt solid">December 31, &nbsp;&nbsp;&nbsp;&nbsp;2017</TD></TR>
<TR STYLE="vertical-align: bottom; background-color: rgb(204,238,255)">
    <TD STYLE="width: 56%; text-align: left">&nbsp;&nbsp;Marketable equity at cost</TD><TD STYLE="width: 8%">&nbsp;</TD>
    <TD STYLE="width: 1%; text-align: left">$</TD><TD STYLE="width: 12%; text-align: right">1,714</TD><TD STYLE="width: 1%; text-align: left">&nbsp;</TD><TD STYLE="width: 8%">&nbsp;</TD>
    <TD STYLE="width: 1%; text-align: left">$</TD><TD STYLE="width: 12%; text-align: right">1,714</TD><TD STYLE="width: 1%; text-align: left">&nbsp;</TD></TR>
<TR STYLE="vertical-align: bottom; background-color: White">
    <TD STYLE="text-align: left; padding-bottom: 1pt">&nbsp;&nbsp;Unrealized gain on marketable equity securities</TD><TD STYLE="padding-bottom: 1pt">&nbsp;</TD>
    <TD STYLE="border-bottom: Black 1pt solid; text-align: left">&nbsp;</TD><TD STYLE="border-bottom: Black 1pt solid; text-align: right">488</TD><TD STYLE="padding-bottom: 1pt; text-align: left">&nbsp;</TD><TD STYLE="padding-bottom: 1pt">&nbsp;</TD>
    <TD STYLE="border-bottom: Black 1pt solid; text-align: left">&nbsp;</TD><TD STYLE="border-bottom: Black 1pt solid; text-align: right">929</TD><TD STYLE="padding-bottom: 1pt; text-align: left">&nbsp;</TD></TR>
<TR STYLE="vertical-align: bottom; background-color: rgb(204,238,255)">
    <TD STYLE="text-align: left; padding-bottom: 1pt">&nbsp;&nbsp;Marketable equity securities at fair value</TD><TD STYLE="padding-bottom: 1pt">&nbsp;</TD>
    <TD STYLE="border-bottom: Black 1pt solid; text-align: left">$</TD><TD STYLE="border-bottom: Black 1pt solid; text-align: right">2,202</TD><TD STYLE="padding-bottom: 1pt; text-align: left">&nbsp;</TD><TD STYLE="padding-bottom: 1pt">&nbsp;</TD>
    <TD STYLE="border-bottom: Black 1pt solid; text-align: left">$</TD><TD STYLE="border-bottom: Black 1pt solid; text-align: right">2,643</TD><TD STYLE="padding-bottom: 1pt; text-align: left">&nbsp;</TD></TR>
</TABLE>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0; text-indent: 0.5in">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0">The following table represents changes, including sales,
in marketable equity securities during the three months ended March 31, 2018 and 2017:</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0">&nbsp;</P>

<TABLE CELLPADDING="0" CELLSPACING="0" STYLE="border-collapse: collapse; width: 100%; font: 10pt Times New Roman, Times, Serif">
<TR STYLE="vertical-align: bottom">
    <TD>(in thousands)</TD><TD>&nbsp;</TD>
    <TD COLSPAN="7" STYLE="text-align: center">Three months ended<BR> March 31,</TD></TR>
<TR STYLE="vertical-align: bottom">
    <TD>&nbsp;</TD><TD STYLE="padding-bottom: 1pt">&nbsp;</TD>
    <TD COLSPAN="3" STYLE="text-align: center; border-bottom: Black 1pt solid">2018</TD><TD STYLE="padding-bottom: 1pt">&nbsp;</TD>
    <TD COLSPAN="3" STYLE="text-align: center; border-bottom: Black 1pt solid">2017</TD></TR>
<TR STYLE="vertical-align: bottom; background-color: rgb(204,238,255)">
    <TD STYLE="width: 56%; text-align: left; padding-left: 5.4pt">Cost of marketable equity securities sold</TD><TD STYLE="width: 8%">&nbsp;</TD>
    <TD STYLE="width: 1%; text-align: left">$</TD><TD STYLE="width: 12%; text-align: right">&mdash;&nbsp;&nbsp;</TD><TD STYLE="width: 1%; text-align: left">&nbsp;</TD><TD STYLE="width: 8%">&nbsp;</TD>
    <TD STYLE="width: 1%; text-align: left">$</TD><TD STYLE="width: 12%; text-align: right">38</TD><TD STYLE="width: 1%; text-align: left">&nbsp;</TD></TR>
<TR STYLE="vertical-align: bottom; background-color: White">
    <TD STYLE="text-align: left; padding-bottom: 1pt; padding-left: 5.4pt">Realized gain on marketable equity securities sold</TD><TD STYLE="padding-bottom: 1pt">&nbsp;</TD>
    <TD STYLE="border-bottom: Black 1pt solid; text-align: left">&nbsp;</TD><TD STYLE="border-bottom: Black 1pt solid; text-align: right">&mdash;&nbsp;&nbsp;</TD><TD STYLE="padding-bottom: 1pt; text-align: left">&nbsp;</TD><TD STYLE="padding-bottom: 1pt">&nbsp;</TD>
    <TD STYLE="border-bottom: Black 1pt solid; text-align: left">&nbsp;</TD><TD STYLE="border-bottom: Black 1pt solid; text-align: right">221</TD><TD STYLE="padding-bottom: 1pt; text-align: left">&nbsp;</TD></TR>
<TR STYLE="vertical-align: bottom; background-color: rgb(204,238,255)">
    <TD STYLE="text-align: left; padding-left: 5.4pt">Proceeds from the sale of marketable equity securities sold</TD><TD>&nbsp;</TD>
    <TD STYLE="text-align: left">&nbsp;</TD><TD STYLE="text-align: right">&mdash;&nbsp;&nbsp;</TD><TD STYLE="text-align: left">&nbsp;</TD><TD>&nbsp;</TD>
    <TD STYLE="text-align: left">&nbsp;</TD><TD STYLE="text-align: right">(259</TD><TD STYLE="text-align: left">)</TD></TR>
<TR STYLE="vertical-align: bottom; background-color: White">
    <TD STYLE="text-align: left; padding-left: 5.4pt">Purchase of marketable equity securities</TD><TD>&nbsp;</TD>
    <TD STYLE="text-align: left">&nbsp;</TD><TD STYLE="text-align: right">&mdash;&nbsp;&nbsp;</TD><TD STYLE="text-align: left">&nbsp;</TD><TD>&nbsp;</TD>
    <TD STYLE="text-align: left">&nbsp;</TD><TD STYLE="text-align: right">477</TD><TD STYLE="text-align: left">&nbsp;</TD></TR>
<TR STYLE="vertical-align: bottom; background-color: rgb(204,238,255)">
    <TD STYLE="text-align: left; padding-bottom: 1pt; padding-left: 5.4pt">Gross unrealized (loss) gain recorded in the statement of operations</TD><TD STYLE="padding-bottom: 1pt">&nbsp;</TD>
    <TD STYLE="border-bottom: Black 1pt solid; text-align: left">&nbsp;</TD><TD STYLE="border-bottom: Black 1pt solid; text-align: right">(441</TD><TD STYLE="padding-bottom: 1pt; text-align: left">)</TD><TD STYLE="padding-bottom: 1pt">&nbsp;</TD>
    <TD STYLE="border-bottom: Black 1pt solid; text-align: left">&nbsp;</TD><TD STYLE="border-bottom: Black 1pt solid; text-align: right">128</TD><TD STYLE="padding-bottom: 1pt; text-align: left">&nbsp;</TD></TR>
<TR STYLE="vertical-align: bottom; background-color: White">
    <TD STYLE="text-align: left; padding-bottom: 1pt; padding-left: 5.4pt">Change in marketable equity securities at fair value</TD><TD STYLE="padding-bottom: 1pt">&nbsp;</TD>
    <TD STYLE="border-bottom: Black 1pt solid; text-align: left">$</TD><TD STYLE="border-bottom: Black 1pt solid; text-align: right">(441</TD><TD STYLE="padding-bottom: 1pt; text-align: left">)</TD><TD STYLE="padding-bottom: 1pt">&nbsp;</TD>
    <TD STYLE="border-bottom: Black 1pt solid; text-align: left">$</TD><TD STYLE="border-bottom: Black 1pt solid; text-align: right">346</TD><TD STYLE="padding-bottom: 1pt; text-align: left">&nbsp;</TD></TR>
</TABLE>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0">&nbsp;</P>

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<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0"></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0; text-indent: 0.5in"><B>4.&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Other
Assets</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0">The following items comprised other assets:</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0">&nbsp;</P>

<TABLE CELLPADDING="0" CELLSPACING="0" STYLE="border-collapse: collapse; width: 100%; font: 10pt Times New Roman, Times, Serif">
<TR STYLE="vertical-align: bottom">
    <TD>(in thousands)</TD><TD>&nbsp;</TD>
    <TD COLSPAN="3" STYLE="text-align: center">March 31,</TD><TD>&nbsp;</TD>
    <TD COLSPAN="3" STYLE="text-align: center">December 31</TD></TR>
<TR STYLE="vertical-align: bottom">
    <TD>&nbsp;</TD><TD STYLE="padding-bottom: 1pt">&nbsp;</TD>
    <TD COLSPAN="3" STYLE="text-align: center; border-bottom: Black 1pt solid">2018</TD><TD STYLE="padding-bottom: 1pt">&nbsp;</TD>
    <TD COLSPAN="3" STYLE="text-align: center; border-bottom: Black 1pt solid">2017</TD></TR>
<TR STYLE="vertical-align: bottom; background-color: rgb(204,238,255)">
    <TD STYLE="width: 56%; text-align: left; padding-left: 5.4pt">Furniture and fixtures, net of accumulated depreciation</TD><TD STYLE="width: 8%">&nbsp;</TD>
    <TD STYLE="width: 1%; text-align: left">$</TD><TD STYLE="width: 12%; text-align: right">38</TD><TD STYLE="width: 1%; text-align: left">&nbsp;</TD><TD STYLE="width: 8%">&nbsp;</TD>
    <TD STYLE="width: 1%; text-align: left">$</TD><TD STYLE="width: 12%; text-align: right">31</TD><TD STYLE="width: 1%; text-align: left">&nbsp;</TD></TR>
<TR STYLE="vertical-align: bottom; background-color: White">
    <TD STYLE="text-align: left; padding-left: 5.4pt">Lik project equipment, net of accumulated depreciation</TD><TD>&nbsp;</TD>
    <TD STYLE="text-align: left">&nbsp;</TD><TD STYLE="text-align: right">85</TD><TD STYLE="text-align: left">&nbsp;</TD><TD>&nbsp;</TD>
    <TD STYLE="text-align: left">&nbsp;</TD><TD STYLE="text-align: right">90</TD><TD STYLE="text-align: left">&nbsp;</TD></TR>
<TR STYLE="vertical-align: bottom; background-color: rgb(204,238,255)">
    <TD STYLE="text-align: left; padding-bottom: 1pt; padding-left: 5.4pt">Exploration bonds and other assets</TD><TD STYLE="padding-bottom: 1pt">&nbsp;</TD>
    <TD STYLE="border-bottom: Black 1pt solid; text-align: left">&nbsp;</TD><TD STYLE="border-bottom: Black 1pt solid; text-align: right">4</TD><TD STYLE="padding-bottom: 1pt; text-align: left">&nbsp;</TD><TD STYLE="padding-bottom: 1pt">&nbsp;</TD>
    <TD STYLE="border-bottom: Black 1pt solid; text-align: left">&nbsp;</TD><TD STYLE="border-bottom: Black 1pt solid; text-align: right">4</TD><TD STYLE="padding-bottom: 1pt; text-align: left">&nbsp;</TD></TR>
<TR STYLE="vertical-align: bottom; background-color: White">
    <TD STYLE="text-align: left; padding-bottom: 1pt; padding-left: 5.4pt">Total other assets</TD><TD STYLE="padding-bottom: 1pt">&nbsp;</TD>
    <TD STYLE="border-bottom: Black 1pt solid; text-align: left">$</TD><TD STYLE="border-bottom: Black 1pt solid; text-align: right">127</TD><TD STYLE="padding-bottom: 1pt; text-align: left">&nbsp;</TD><TD STYLE="padding-bottom: 1pt">&nbsp;</TD>
    <TD STYLE="border-bottom: Black 1pt solid; text-align: left">$</TD><TD STYLE="border-bottom: Black 1pt solid; text-align: right">125</TD><TD STYLE="padding-bottom: 1pt; text-align: left">&nbsp;</TD></TR>
</TABLE>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0"><B>5.&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Derivative
Instruments</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0"><U>Vendetta Warrants</U></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0; text-indent: 0.5in">During the three months ended March
31, 2017, Solitario exercised 2,240,000 of the Vendetta Warrants it held and received 2,240,000 Vendetta common shares, by paying
$167,000 (Cdn$224,000) to Vendetta. As a result, as of March 31, 2017, Solitario owned 5,000,000 Vendetta Warrants, which are carried
at fair value, based upon a Black-Scholes model. During the three months ended March 31, 2017, Solitario recorded a gain on derivative
instruments of $148,000, related to the Vendetta Warrants. Solitario owned no Vendetta Warrants during the three months ended March
31, 2018; see Note 3, &#8220;Marketable equity securities,&#8221; above.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 44.1pt 0 0"><U>Covered Call Options </U></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 44.1pt 0 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 44.1pt 0 0; text-indent: 0.5in">From time to time Solitario has sold
covered call options against its holdings of Kinross. The business purpose of selling covered calls is to provide additional liquidity
on a limited portion of shares of Kinross that Solitario may sell in the near term, which is generally defined as less than one
year. Solitario has not designated its covered calls as hedging instruments and records gains or loss on the covered call in the
period of the change.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 44.1pt 0 0; text-indent: 0.5in">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0; text-align: left">Solitario recorded the following gain
on derivative instruments:</P>

<TABLE CELLPADDING="0" CELLSPACING="0" STYLE="border-collapse: collapse; width: 100%; font: 10pt Times New Roman, Times, Serif">
<TR STYLE="vertical-align: bottom">
    <TD>(in thousands)</TD><TD>&nbsp;</TD>
    <TD COLSPAN="7" STYLE="text-align: center">Three months ended <BR>March 31,</TD></TR>
<TR STYLE="vertical-align: bottom">
    <TD>&nbsp;</TD><TD STYLE="padding-bottom: 1pt">&nbsp;</TD>
    <TD COLSPAN="3" STYLE="text-align: center; border-bottom: Black 1pt solid">2018</TD><TD STYLE="padding-bottom: 1pt">&nbsp;</TD>
    <TD COLSPAN="3" STYLE="text-align: center; border-bottom: Black 1pt solid">2017</TD></TR>
<TR STYLE="vertical-align: bottom; background-color: rgb(204,238,255)">
    <TD STYLE="width: 56%; text-align: left; padding-left: 5.4pt">&nbsp;&nbsp;Gain (loss) on Kinross calls</TD><TD STYLE="width: 8%">&nbsp;</TD>
    <TD STYLE="width: 1%; text-align: left">$</TD><TD STYLE="width: 12%; text-align: right">&mdash;&nbsp;&nbsp;</TD><TD STYLE="width: 1%; text-align: left">&nbsp;</TD><TD STYLE="width: 8%">&nbsp;</TD>
    <TD STYLE="width: 1%; text-align: left">$</TD><TD STYLE="width: 12%; text-align: right">24</TD><TD STYLE="width: 1%; text-align: left">&nbsp;</TD></TR>
<TR STYLE="vertical-align: bottom; background-color: White">
    <TD STYLE="text-align: left; padding-bottom: 1pt; padding-left: 5.4pt">&nbsp;&nbsp;Gain on Vendetta Warrants</TD><TD STYLE="padding-bottom: 1pt">&nbsp;</TD>
    <TD STYLE="border-bottom: Black 1pt solid; text-align: left">&nbsp;</TD><TD STYLE="border-bottom: Black 1pt solid; text-align: right">&mdash;&nbsp;&nbsp;</TD><TD STYLE="padding-bottom: 1pt; text-align: left">&nbsp;</TD><TD STYLE="padding-bottom: 1pt">&nbsp;</TD>
    <TD STYLE="border-bottom: Black 1pt solid; text-align: left">&nbsp;</TD><TD STYLE="border-bottom: Black 1pt solid; text-align: right">148</TD><TD STYLE="padding-bottom: 1pt; text-align: left">&nbsp;</TD></TR>
<TR STYLE="vertical-align: bottom; background-color: rgb(204,238,255)">
    <TD STYLE="padding-bottom: 1pt; padding-left: 5.4pt">&nbsp;</TD><TD STYLE="padding-bottom: 1pt">&nbsp;</TD>
    <TD STYLE="border-bottom: Black 1pt solid; text-align: left">$</TD><TD STYLE="border-bottom: Black 1pt solid; text-align: right">&mdash;&nbsp;&nbsp;</TD><TD STYLE="padding-bottom: 1pt; text-align: left">&nbsp;</TD><TD STYLE="padding-bottom: 1pt">&nbsp;</TD>
    <TD STYLE="border-bottom: Black 1pt solid; text-align: left">$</TD><TD STYLE="border-bottom: Black 1pt solid; text-align: right">172</TD><TD STYLE="padding-bottom: 1pt; text-align: left">&nbsp;</TD></TR>
</TABLE>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0"><B>6.&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Fair
Value</B></P>

<P STYLE="font: 10pt/12pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0; background-color: white">&nbsp;</P>

<P STYLE="font: 10pt/12pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0; text-indent: 0.5in; background-color: white">For
certain of Solitario&#8217;s financial instruments, including cash and cash equivalents and payables, the carrying amounts approximate
fair value due to their short-term maturities. Solitario&#8217;s short-term investments in CDs and USTS, Kinross calls and marketable
equity securities are carried at their estimated fair value primarily based on quoted market prices.</P>

<P STYLE="font: 10pt/12pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0; background-color: white">&nbsp;</P>

<P STYLE="font: 10pt/12pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0; text-indent: 0.5in; background-color: white">Solitario
accounts for its financial instruments under ASC 820. ASC 820 establishes a framework for measuring fair value and requires enhanced
disclosures about fair value measurements. ASC 820 clarifies that fair value is an exit price, representing the amount that would
be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants. ASC 820 also
requires disclosure about how fair value is determined for assets and liabilities and establishes a hierarchy for which these assets
and liabilities must be grouped, based on significant levels of inputs as follows:</P>

<P STYLE="font: 10pt/12pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0; background-color: white">&nbsp;</P>

<TABLE CELLPADDING="0" CELLSPACING="0" WIDTH="100%" STYLE="font: 11pt/115% Calibri, Helvetica, Sans-Serif; margin-top: 0; margin-bottom: 0"><TR STYLE="vertical-align: top">
<TD STYLE="width: 0.25in"></TD><TD STYLE="width: 0.25in"><FONT STYLE="font-family: Symbol; font-size: 10pt">&middot;</FONT></TD><TD STYLE="padding-right: 0.55in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><B>Level 1</B>: quoted
prices in active markets for identical assets or liabilities;</FONT></TD></TR></TABLE>

<TABLE CELLPADDING="0" CELLSPACING="0" WIDTH="100%" STYLE="font: 11pt/115% Calibri, Helvetica, Sans-Serif; margin-top: 0; margin-bottom: 0"><TR STYLE="vertical-align: top">
<TD STYLE="width: 0.25in"></TD><TD STYLE="width: 0.25in"><FONT STYLE="font-family: Symbol; font-size: 10pt">&middot;</FONT></TD><TD STYLE="padding-right: 0.55in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><B>Level 2</B>: quoted
prices in active markets for similar assets and liabilities and inputs that are observable for the asset or liability; or</FONT></TD></TR></TABLE>

<TABLE CELLPADDING="0" CELLSPACING="0" WIDTH="100%" STYLE="font: 11pt/115% Calibri, Helvetica, Sans-Serif; margin-top: 0; margin-bottom: 0"><TR STYLE="vertical-align: top">
<TD STYLE="width: 0.25in"></TD><TD STYLE="width: 0.25in"><FONT STYLE="font-family: Symbol; font-size: 10pt">&middot;</FONT></TD><TD STYLE="padding-right: 0.55in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><B>Level 3</B>: Unobservable
inputs in which there is little or no market data, which require the reporting entity to develop its own assumptions.</FONT></TD></TR></TABLE>

<P STYLE="font: 10pt/12pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0; background-color: white">&nbsp;</P>

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<P STYLE="font: 10pt/12pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0; background-color: white"></P>




<P STYLE="font: 10pt/12pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0; text-indent: 0.5in; background-color: white">The
determination of where assets and liabilities fall within this hierarchy is based upon the lowest level of input that is significant
to the fair value measurement. During the three months ended March 31, 2018 there were no reclassifications in financial assets
or liabilities between Level 1, 2 or 3 categories.</P>

<P STYLE="font: 10pt/12pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0; background-color: white">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0; text-indent: 0.5in">The following is a listing of Solitario&#8217;s
financial assets and liabilities required to be measured at fair value on a recurring basis and where they are classified within
the hierarchy as of March 31, 2018:</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify">&nbsp;</P>

<TABLE CELLPADDING="0" CELLSPACING="0" STYLE="border-collapse: collapse; width: 100%; font: 10pt Times New Roman, Times, Serif">
<TR STYLE="vertical-align: bottom">
    <TD STYLE="text-align: justify; border-bottom: Black 1pt solid">(in thousands)</TD><TD STYLE="padding-bottom: 1pt">&nbsp;</TD>
    <TD COLSPAN="3" STYLE="text-align: right; border-bottom: Black 1pt solid">Level 1</TD><TD STYLE="padding-bottom: 1pt">&nbsp;</TD>
    <TD COLSPAN="3" STYLE="text-align: right; border-bottom: Black 1pt solid">Level 2</TD><TD STYLE="padding-bottom: 1pt">&nbsp;</TD>
    <TD COLSPAN="3" STYLE="text-align: right; border-bottom: Black 1pt solid">Level 3</TD><TD STYLE="padding-bottom: 1pt">&nbsp;</TD>
    <TD COLSPAN="3" STYLE="text-align: right; border-bottom: Black 1pt solid">Total</TD></TR>
<TR STYLE="vertical-align: bottom; background-color: rgb(204,238,255)">
    <TD STYLE="font-weight: bold">Assets</TD><TD>&nbsp;</TD>
    <TD STYLE="text-align: left">&nbsp;</TD><TD STYLE="text-align: right">&nbsp;</TD><TD STYLE="text-align: left">&nbsp;</TD><TD>&nbsp;</TD>
    <TD STYLE="text-align: left">&nbsp;</TD><TD STYLE="text-align: right">&nbsp;</TD><TD STYLE="text-align: left">&nbsp;</TD><TD>&nbsp;</TD>
    <TD STYLE="text-align: left">&nbsp;</TD><TD STYLE="text-align: right">&nbsp;</TD><TD STYLE="text-align: left">&nbsp;</TD><TD>&nbsp;</TD>
    <TD STYLE="text-align: left">&nbsp;</TD><TD STYLE="text-align: right">&nbsp;</TD><TD STYLE="text-align: left">&nbsp;</TD></TR>
<TR STYLE="vertical-align: bottom; background-color: White">
    <TD STYLE="width: 40%; text-align: left">&nbsp;&nbsp;Marketable equity securities</TD><TD STYLE="width: 3%">&nbsp;</TD>
    <TD STYLE="width: 1%; text-align: left">$</TD><TD STYLE="width: 10%; text-align: right">2,202</TD><TD STYLE="width: 1%; text-align: left">&nbsp;</TD><TD STYLE="width: 3%">&nbsp;</TD>
    <TD STYLE="width: 1%; text-align: left">$</TD><TD STYLE="width: 10%; text-align: right">&mdash;&nbsp;&nbsp;</TD><TD STYLE="width: 1%; text-align: left">&nbsp;</TD><TD STYLE="width: 3%">&nbsp;</TD>
    <TD STYLE="width: 1%; text-align: left">$</TD><TD STYLE="width: 10%; text-align: right">&mdash;&nbsp;&nbsp;</TD><TD STYLE="width: 1%; text-align: left">&nbsp;</TD><TD STYLE="width: 3%">&nbsp;</TD>
    <TD STYLE="width: 1%; text-align: left">$</TD><TD STYLE="width: 10%; text-align: right">2,202</TD><TD STYLE="width: 1%; text-align: left">&nbsp;</TD></TR>
<TR STYLE="vertical-align: bottom; background-color: rgb(204,238,255)">
    <TD STYLE="text-align: left">&nbsp;&nbsp;United States Treasury securities</TD><TD>&nbsp;</TD>
    <TD STYLE="text-align: left">&nbsp;</TD><TD STYLE="text-align: right">9,976</TD><TD STYLE="text-align: left">&nbsp;</TD><TD>&nbsp;</TD>
    <TD STYLE="text-align: left">&nbsp;</TD><TD STYLE="text-align: right">&mdash;&nbsp;&nbsp;</TD><TD STYLE="text-align: left">&nbsp;</TD><TD>&nbsp;</TD>
    <TD STYLE="text-align: left">&nbsp;</TD><TD STYLE="text-align: right">&mdash;&nbsp;&nbsp;</TD><TD STYLE="text-align: left">&nbsp;</TD><TD>&nbsp;</TD>
    <TD STYLE="text-align: left">&nbsp;</TD><TD STYLE="text-align: right">9,976</TD><TD STYLE="text-align: left">&nbsp;</TD></TR>
<TR STYLE="vertical-align: bottom; background-color: White">
    <TD STYLE="text-align: left">&nbsp;&nbsp;Bank Certificates of Deposit</TD><TD>&nbsp;</TD>
    <TD STYLE="text-align: left">&nbsp;</TD><TD STYLE="text-align: right">1,247</TD><TD STYLE="text-align: left">&nbsp;</TD><TD>&nbsp;</TD>
    <TD STYLE="text-align: left">&nbsp;</TD><TD STYLE="text-align: right">&mdash;&nbsp;&nbsp;</TD><TD STYLE="text-align: left">&nbsp;</TD><TD>&nbsp;</TD>
    <TD STYLE="text-align: left">&nbsp;</TD><TD STYLE="text-align: right">&mdash;&nbsp;&nbsp;</TD><TD STYLE="text-align: left">&nbsp;</TD><TD>&nbsp;</TD>
    <TD STYLE="text-align: left">&nbsp;</TD><TD STYLE="text-align: right">1,247</TD><TD STYLE="text-align: left">&nbsp;</TD></TR>
</TABLE>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0; text-indent: 0.5in">The following is a listing of Solitario&#8217;s
financial assets and liabilities required to be measured at fair value on a recurring basis and where they are classified within
the hierarchy as of December 31, 2017:</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify">&nbsp;</P>

<TABLE CELLPADDING="0" CELLSPACING="0" STYLE="border-collapse: collapse; width: 100%; font: 10pt Times New Roman, Times, Serif">
<TR STYLE="vertical-align: bottom">
    <TD STYLE="text-align: justify; border-bottom: Black 1pt solid">(in thousands)</TD><TD STYLE="padding-bottom: 1pt">&nbsp;</TD>
    <TD COLSPAN="3" STYLE="text-align: center; border-bottom: Black 1pt solid">Level 1</TD><TD STYLE="padding-bottom: 1pt">&nbsp;</TD>
    <TD COLSPAN="3" STYLE="text-align: center; border-bottom: Black 1pt solid">Level 2</TD><TD STYLE="padding-bottom: 1pt">&nbsp;</TD>
    <TD COLSPAN="3" STYLE="text-align: center; border-bottom: Black 1pt solid">Level 3</TD><TD STYLE="padding-bottom: 1pt">&nbsp;</TD>
    <TD COLSPAN="3" STYLE="text-align: center; border-bottom: Black 1pt solid">Total</TD></TR>
<TR STYLE="vertical-align: bottom; background-color: rgb(204,238,255)">
    <TD STYLE="font-weight: bold">Assets</TD><TD>&nbsp;</TD>
    <TD STYLE="text-align: left">&nbsp;</TD><TD STYLE="text-align: right">&nbsp;</TD><TD STYLE="text-align: left">&nbsp;</TD><TD>&nbsp;</TD>
    <TD STYLE="text-align: left">&nbsp;</TD><TD STYLE="text-align: right">&nbsp;</TD><TD STYLE="text-align: left">&nbsp;</TD><TD>&nbsp;</TD>
    <TD STYLE="text-align: left">&nbsp;</TD><TD STYLE="text-align: right">&nbsp;</TD><TD STYLE="text-align: left">&nbsp;</TD><TD>&nbsp;</TD>
    <TD STYLE="text-align: left">&nbsp;</TD><TD STYLE="text-align: right">&nbsp;</TD><TD STYLE="text-align: left">&nbsp;</TD></TR>
<TR STYLE="vertical-align: bottom; background-color: White">
    <TD STYLE="width: 40%; text-align: left">&nbsp;&nbsp;Marketable equity securities</TD><TD STYLE="width: 3%">&nbsp;</TD>
    <TD STYLE="width: 1%; text-align: left">$</TD><TD STYLE="width: 10%; text-align: right">2,643</TD><TD STYLE="width: 1%; text-align: left">&nbsp;</TD><TD STYLE="width: 3%">&nbsp;</TD>
    <TD STYLE="width: 1%; text-align: left">$</TD><TD STYLE="width: 10%; text-align: right">&mdash;&nbsp;&nbsp;</TD><TD STYLE="width: 1%; text-align: left">&nbsp;</TD><TD STYLE="width: 3%">&nbsp;</TD>
    <TD STYLE="width: 1%; text-align: left">$</TD><TD STYLE="width: 10%; text-align: right">&mdash;&nbsp;&nbsp;</TD><TD STYLE="width: 1%; text-align: left">&nbsp;</TD><TD STYLE="width: 3%">&nbsp;</TD>
    <TD STYLE="width: 1%; text-align: left">$</TD><TD STYLE="width: 10%; text-align: right">2,643</TD><TD STYLE="width: 1%; text-align: left">&nbsp;</TD></TR>
<TR STYLE="vertical-align: bottom; background-color: rgb(204,238,255)">
    <TD STYLE="text-align: left">&nbsp;&nbsp;United States Treasury securities</TD><TD>&nbsp;</TD>
    <TD STYLE="text-align: left">&nbsp;</TD><TD STYLE="text-align: right">10,395</TD><TD STYLE="text-align: left">&nbsp;</TD><TD>&nbsp;</TD>
    <TD STYLE="text-align: left">&nbsp;</TD><TD STYLE="text-align: right">&mdash;&nbsp;&nbsp;</TD><TD STYLE="text-align: left">&nbsp;</TD><TD>&nbsp;</TD>
    <TD STYLE="text-align: left">&nbsp;</TD><TD STYLE="text-align: right">&mdash;&nbsp;&nbsp;</TD><TD STYLE="text-align: left">&nbsp;</TD><TD>&nbsp;</TD>
    <TD STYLE="text-align: left">&nbsp;</TD><TD STYLE="text-align: right">10,395</TD><TD STYLE="text-align: left">&nbsp;</TD></TR>
<TR STYLE="vertical-align: bottom; background-color: White">
    <TD STYLE="text-align: left">&nbsp;&nbsp;Bank Certificates of Deposit</TD><TD>&nbsp;</TD>
    <TD STYLE="text-align: left">&nbsp;</TD><TD STYLE="text-align: right">1,247</TD><TD STYLE="text-align: left">&nbsp;</TD><TD>&nbsp;</TD>
    <TD STYLE="text-align: left">&nbsp;</TD><TD STYLE="text-align: right">&mdash;&nbsp;&nbsp;</TD><TD STYLE="text-align: left">&nbsp;</TD><TD>&nbsp;</TD>
    <TD STYLE="text-align: left">&nbsp;</TD><TD STYLE="text-align: right">&mdash;&nbsp;&nbsp;</TD><TD STYLE="text-align: left">&nbsp;</TD><TD>&nbsp;</TD>
    <TD STYLE="text-align: left">&nbsp;</TD><TD STYLE="text-align: right">1,247</TD><TD STYLE="text-align: left">&nbsp;</TD></TR>
</TABLE>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0"><B>7.&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Income
Taxes</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0; text-indent: 0.5in">Solitario accounts for income taxes
in accordance with ASC 740. Under ASC 740, income taxes are provided for the tax effects of transactions reported in the financial
statements and consist of taxes currently due plus deferred taxes related to certain income and expenses recognized in different
periods for financial and income tax reporting purposes. Deferred tax assets and liabilities represent the future tax return consequences
of those differences, which will either be taxable or deductible when the assets and liabilities are recovered or settled. Deferred
taxes are also recognized for operating losses and tax credits that are available to offset future taxable income and income taxes,
respectively. A valuation allowance is provided if it is more likely than not that some portion or all of the deferred tax assets
will not be realized.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0; text-indent: 0.5in">At March 31, 2018 and December 31,
2017, a valuation allowance has been recorded, which fully offsets Solitario&#8217;s net deferred tax assets, because it is more
likely than not that the Company will not realize some portion or all of its deferred tax assets.&nbsp; The Company continually
assesses both positive and negative evidence to determine whether it is more likely than not that the deferred tax assets can be
realized prior to their expiration.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0; text-indent: 0.5in">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0; text-indent: 0.5in">During the three months ended March
31, 2018 and 2017, Solitario recorded no deferred tax expense.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0"><B>8.&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Employee
Stock Compensation Plans</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0; text-indent: 0.5in">On June 18, 2013, Solitario&#8217;s
shareholders approved the 2013 Solitario Exploration &amp; Royalty Corp. Omnibus Stock and Incentive Plan (the &#8220;2013 Plan&#8221;).
Under the terms of the 2013 Plan, a total of 1,750,000 shares of Solitario common stock were reserved for awards to directors,
officers, employees and consultants. On June 29, 2017, Solitario shareholders approved an amendment to the 2013 Plan, which increased
the number of shares of common stock available for issuance under the 2013 Plan from 1,750,000 to 5,750,000. Awards granted under
the 2013 Plan may take the form of stock options, stock appreciation rights, restricted stock, and restricted stock units. The
terms and conditions of the awards are pursuant to the 2013 Plan and are granted by the Board of Directors or a committee appointed
by the Board of Directors.</P>

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<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0"></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0; text-indent: 0.5in">As of March 31, 2018, and December
31, 2017 there were options outstanding that are exercisable to acquire 2,082,428 and 1,928,428 shares of Solitario common stock,
respectively. These options have exercise prices between $0.54 per share and $1.74 per share. Of these, 1,728,428 shares were
Replacement Options granted in connection with the Acquisition. During the three months ended March 31, 2018, Solitario granted
options exercisable into 100,000 shares to a consultant, with an exercise price of $0.62 per share, a term of seven months and
a grant date fair value of $12,000 based upon a Black-Scholes model with a 66% volatility and a 1% risk-free interest rate. There
were no stock grants during the three months ended March 31, 2017. There were no exercises of options under the 2013 Plan during
the three months ended March 31, 2018 and 2017. During the three months ended March 31, 2018, Solitario recorded stock option
compensation expense of $10,000. Solitario had no stock options outstanding and recorded no stock option compensation expense
during the three months ended March 31, 2017.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0; text-indent: 0.5in">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0; text-indent: 0.5in">On September 1, 2017, the Board of
Directors granted, subject to shareholder approval at the next meeting of shareholders, an additional 2,300,000 stock options under
the 2013 Plan to officers and members of the board of directors (the &#8220;Conditional Options&#8221;). The Conditional Options
have a five-year life, and exercise price of $0.77 per share, and a grant date fair value of $970,000, based upon a Black-Scholes
model with a volatility of 64%, and a risk-free interest rate of 1.70%. If approved, the Conditional Options will vest on the schedule
of 25% on date of grant and 25% on each of the next three anniversary dates of the date of grant. The Conditional Options are not
deemed outstanding and will not become exercisable in whole or in part unless Solitario shareholders approve the grants, and the
option grants will be void if Solitario shareholders do not approve the grants. Solitario will not record any stock option expense
related to these options unless and until shareholder approval is received.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0; text-indent: 0.5in">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0"><B>9.&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Shareholders&#8217;
Equity and Accumulated Other Comprehensive Income</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0">&nbsp;</P>

<TABLE CELLPADDING="0" CELLSPACING="0" STYLE="border-collapse: collapse; width: 100%; font: 10pt Times New Roman, Times, Serif">
<TR STYLE="vertical-align: bottom">
    <TD>(in thousands, except</TD><TD>&nbsp;</TD>
    <TD COLSPAN="3" STYLE="text-align: center">&nbsp;</TD><TD>&nbsp;</TD>
    <TD COLSPAN="3" STYLE="text-align: center">&nbsp;</TD><TD>&nbsp;</TD>
    <TD COLSPAN="3" STYLE="text-align: center">&nbsp;</TD><TD>&nbsp;</TD>
    <TD COLSPAN="3" STYLE="text-align: center">&nbsp;</TD><TD>&nbsp;</TD>
    <TD COLSPAN="3" STYLE="text-align: center">Accumulated</TD><TD>&nbsp;</TD>
    <TD COLSPAN="3" STYLE="text-align: center">&nbsp;</TD></TR>
<TR STYLE="vertical-align: bottom">
    <TD>Share amounts)</TD><TD>&nbsp;</TD>
    <TD COLSPAN="3" STYLE="text-align: center">Common</TD><TD>&nbsp;</TD>
    <TD COLSPAN="3" STYLE="text-align: center">Common</TD><TD>&nbsp;</TD>
    <TD COLSPAN="3" STYLE="text-align: center">Additional</TD><TD>&nbsp;</TD>
    <TD COLSPAN="3" STYLE="text-align: center">&nbsp;</TD><TD>&nbsp;</TD>
    <TD COLSPAN="3" STYLE="text-align: center">Other</TD><TD>&nbsp;</TD>
    <TD COLSPAN="3" STYLE="text-align: center">Total</TD></TR>
<TR STYLE="vertical-align: bottom">
    <TD>&nbsp;</TD><TD>&nbsp;</TD>
    <TD COLSPAN="3" STYLE="text-align: center">Stock</TD><TD>&nbsp;</TD>
    <TD COLSPAN="3" STYLE="text-align: center">Stock</TD><TD>&nbsp;</TD>
    <TD COLSPAN="3" STYLE="text-align: center">Paid-in</TD><TD>&nbsp;</TD>
    <TD COLSPAN="3" STYLE="text-align: center">Accumulated</TD><TD>&nbsp;</TD>
    <TD COLSPAN="3" STYLE="text-align: center">Comprehensive</TD><TD>&nbsp;</TD>
    <TD COLSPAN="3" STYLE="text-align: center">Shareholders&rsquo;</TD></TR>
<TR STYLE="vertical-align: bottom">
    <TD>&nbsp;</TD><TD STYLE="padding-bottom: 1pt">&nbsp;</TD>
    <TD COLSPAN="3" STYLE="text-align: center; border-bottom: Black 1pt solid">Shares</TD><TD STYLE="padding-bottom: 1pt">&nbsp;</TD>
    <TD COLSPAN="3" STYLE="text-align: center; border-bottom: Black 1pt solid">Amount</TD><TD STYLE="padding-bottom: 1pt">&nbsp;</TD>
    <TD COLSPAN="3" STYLE="text-align: center; border-bottom: Black 1pt solid">Capital</TD><TD STYLE="padding-bottom: 1pt">&nbsp;</TD>
    <TD COLSPAN="3" STYLE="text-align: center; border-bottom: Black 1pt solid">Deficit</TD><TD STYLE="padding-bottom: 1pt">&nbsp;</TD>
    <TD COLSPAN="3" STYLE="text-align: center; border-bottom: Black 1pt solid">Income</TD><TD STYLE="padding-bottom: 1pt">&nbsp;</TD>
    <TD COLSPAN="3" STYLE="text-align: center; border-bottom: Black 1pt solid">Equity</TD></TR>
<TR STYLE="vertical-align: bottom; background-color: rgb(204,238,255)">
    <TD STYLE="width: 40%; font-weight: bold; padding-left: 5.4pt">Balance at December 31, 2017</TD><TD STYLE="width: 2%; font-weight: bold">&nbsp;</TD>
    <TD STYLE="width: 1%; font-weight: bold; text-align: left">&nbsp;</TD><TD STYLE="width: 6%; font-weight: bold; text-align: right">58,434,566</TD><TD STYLE="width: 1%; font-weight: bold; text-align: left">&nbsp;</TD><TD STYLE="width: 2%; font-weight: bold">&nbsp;</TD>
    <TD STYLE="width: 1%; font-weight: bold; text-align: left">&nbsp;</TD><TD STYLE="width: 6%; font-weight: bold; text-align: right">584</TD><TD STYLE="width: 1%; font-weight: bold; text-align: left">&nbsp;</TD><TD STYLE="width: 2%; font-weight: bold">&nbsp;</TD>
    <TD STYLE="width: 1%; font-weight: bold; text-align: left">$</TD><TD STYLE="width: 6%; font-weight: bold; text-align: right">69,312</TD><TD STYLE="width: 1%; font-weight: bold; text-align: left">&nbsp;</TD><TD STYLE="width: 2%; font-weight: bold">&nbsp;</TD>
    <TD STYLE="width: 1%; font-weight: bold; text-align: left">$</TD><TD STYLE="width: 6%; font-weight: bold; text-align: right">(40,343</TD><TD STYLE="width: 1%; font-weight: bold; text-align: left">)</TD><TD STYLE="width: 2%; font-weight: bold">&nbsp;</TD>
    <TD STYLE="width: 1%; font-weight: bold; text-align: left">$</TD><TD STYLE="width: 6%; font-weight: bold; text-align: right">576</TD><TD STYLE="width: 1%; font-weight: bold; text-align: left">&nbsp;</TD><TD STYLE="width: 2%; font-weight: bold">&nbsp;</TD>
    <TD STYLE="width: 1%; font-weight: bold; text-align: left">$</TD><TD STYLE="width: 6%; font-weight: bold; text-align: right">30,129</TD><TD STYLE="width: 1%; font-weight: bold; text-align: left">&nbsp;</TD></TR>
<TR STYLE="vertical-align: bottom; background-color: White">
    <TD STYLE="text-align: left; padding-bottom: 1pt; padding-left: 5.4pt">Cumulative-effect adjustment <BR>change in accounting principle</TD><TD STYLE="font-weight: bold; padding-bottom: 1pt">&nbsp;</TD>
    <TD STYLE="border-bottom: Black 1pt solid; font-weight: bold; text-align: left">&nbsp;</TD><TD STYLE="border-bottom: Black 1pt solid; font-weight: bold; text-align: right">&mdash;&nbsp;&nbsp;</TD><TD STYLE="padding-bottom: 1pt; font-weight: bold; text-align: left">&nbsp;</TD><TD STYLE="font-weight: bold; padding-bottom: 1pt">&nbsp;</TD>
    <TD STYLE="border-bottom: Black 1pt solid; font-weight: bold; text-align: left">&nbsp;</TD><TD STYLE="border-bottom: Black 1pt solid; font-weight: bold; text-align: right">&mdash;&nbsp;&nbsp;</TD><TD STYLE="padding-bottom: 1pt; font-weight: bold; text-align: left">&nbsp;</TD><TD STYLE="font-weight: bold; padding-bottom: 1pt">&nbsp;</TD>
    <TD STYLE="border-bottom: Black 1pt solid; font-weight: bold; text-align: left">&nbsp;</TD><TD STYLE="border-bottom: Black 1pt solid; font-weight: bold; text-align: right">&mdash;&nbsp;&nbsp;</TD><TD STYLE="padding-bottom: 1pt; font-weight: bold; text-align: left">&nbsp;</TD><TD STYLE="padding-bottom: 1pt">&nbsp;</TD>
    <TD STYLE="border-bottom: Black 1pt solid; text-align: left">&nbsp;</TD><TD STYLE="border-bottom: Black 1pt solid; text-align: right">576</TD><TD STYLE="padding-bottom: 1pt; text-align: left">&nbsp;</TD><TD STYLE="padding-bottom: 1pt">&nbsp;</TD>
    <TD STYLE="border-bottom: Black 1pt solid; text-align: left">&nbsp;</TD><TD STYLE="border-bottom: Black 1pt solid; text-align: right">(576</TD><TD STYLE="padding-bottom: 1pt; text-align: left">)</TD><TD STYLE="font-weight: bold; padding-bottom: 1pt">&nbsp;</TD>
    <TD STYLE="border-bottom: Black 1pt solid; font-weight: bold; text-align: left">&nbsp;</TD><TD STYLE="border-bottom: Black 1pt solid; font-weight: bold; text-align: right">&mdash;&nbsp;&nbsp;</TD><TD STYLE="padding-bottom: 1pt; font-weight: bold; text-align: left">&nbsp;</TD></TR>
<TR STYLE="vertical-align: bottom; background-color: rgb(204,238,255)">
    <TD STYLE="font-weight: bold; padding-left: 5.4pt">Adjusted balance January 1, 2018</TD><TD STYLE="font-weight: bold">&nbsp;</TD>
    <TD STYLE="font-weight: bold; text-align: left">&nbsp;</TD><TD STYLE="font-weight: bold; text-align: right">58,434,566</TD><TD STYLE="font-weight: bold; text-align: left">&nbsp;</TD><TD STYLE="font-weight: bold">&nbsp;</TD>
    <TD STYLE="font-weight: bold; text-align: left">&nbsp;</TD><TD STYLE="font-weight: bold; text-align: right">584</TD><TD STYLE="font-weight: bold; text-align: left">&nbsp;</TD><TD STYLE="font-weight: bold">&nbsp;</TD>
    <TD STYLE="font-weight: bold; text-align: left">&nbsp;</TD><TD STYLE="font-weight: bold; text-align: right">69,312</TD><TD STYLE="font-weight: bold; text-align: left">&nbsp;</TD><TD STYLE="font-weight: bold">&nbsp;</TD>
    <TD STYLE="font-weight: bold; text-align: left">&nbsp;</TD><TD STYLE="font-weight: bold; text-align: right">(39,767</TD><TD STYLE="font-weight: bold; text-align: left">)</TD><TD STYLE="font-weight: bold">&nbsp;</TD>
    <TD STYLE="font-weight: bold; text-align: left">&nbsp;</TD><TD STYLE="font-weight: bold; text-align: right">&mdash;&nbsp;&nbsp;</TD><TD STYLE="font-weight: bold; text-align: left">&nbsp;</TD><TD STYLE="font-weight: bold">&nbsp;</TD>
    <TD STYLE="font-weight: bold; text-align: left">&nbsp;</TD><TD STYLE="font-weight: bold; text-align: right">30,129</TD><TD STYLE="font-weight: bold; text-align: left">&nbsp;</TD></TR>
<TR STYLE="vertical-align: bottom; background-color: White">
    <TD STYLE="text-align: left; padding-left: 5.4pt">Stock option expense</TD><TD STYLE="font-weight: bold">&nbsp;</TD>
    <TD STYLE="font-weight: bold; text-align: left">&nbsp;</TD><TD STYLE="font-weight: bold; text-align: right">&mdash;&nbsp;&nbsp;</TD><TD STYLE="font-weight: bold; text-align: left">&nbsp;</TD><TD STYLE="font-weight: bold">&nbsp;</TD>
    <TD STYLE="font-weight: bold; text-align: left">&nbsp;</TD><TD STYLE="font-weight: bold; text-align: right">&mdash;&nbsp;&nbsp;</TD><TD STYLE="font-weight: bold; text-align: left">&nbsp;</TD><TD>&nbsp;</TD>
    <TD STYLE="text-align: left">&nbsp;</TD><TD STYLE="text-align: right">10</TD><TD STYLE="text-align: left">&nbsp;</TD><TD STYLE="font-weight: bold">&nbsp;</TD>
    <TD STYLE="font-weight: bold; text-align: left">&nbsp;</TD><TD STYLE="font-weight: bold; text-align: right">&mdash;&nbsp;&nbsp;</TD><TD STYLE="font-weight: bold; text-align: left">&nbsp;</TD><TD STYLE="font-weight: bold">&nbsp;</TD>
    <TD STYLE="font-weight: bold; text-align: left">&nbsp;</TD><TD STYLE="font-weight: bold; text-align: right">&mdash;&nbsp;&nbsp;</TD><TD STYLE="font-weight: bold; text-align: left">&nbsp;</TD><TD>&nbsp;</TD>
    <TD STYLE="text-align: left">&nbsp;</TD><TD STYLE="text-align: right">10</TD><TD STYLE="text-align: left">&nbsp;</TD></TR>
<TR STYLE="vertical-align: bottom; background-color: rgb(204,238,255)">
    <TD STYLE="padding-left: 5.4pt">Purchase of shares for cancellation</TD><TD>&nbsp;</TD>
    <TD STYLE="text-align: left">&nbsp;</TD><TD STYLE="text-align: right">(52,614</TD><TD STYLE="text-align: left">)</TD><TD>&nbsp;</TD>
    <TD STYLE="text-align: left">&nbsp;</TD><TD STYLE="text-align: right">&mdash;&nbsp;&nbsp;</TD><TD STYLE="text-align: left">&nbsp;</TD><TD>&nbsp;</TD>
    <TD STYLE="text-align: left">&nbsp;</TD><TD STYLE="text-align: right">(26</TD><TD STYLE="text-align: left">)</TD><TD>&nbsp;</TD>
    <TD STYLE="text-align: left">&nbsp;</TD><TD STYLE="text-align: right">&mdash;&nbsp;&nbsp;</TD><TD STYLE="text-align: left">&nbsp;</TD><TD>&nbsp;</TD>
    <TD STYLE="text-align: left">&nbsp;</TD><TD STYLE="text-align: right">&mdash;&nbsp;&nbsp;</TD><TD STYLE="text-align: left">&nbsp;</TD><TD>&nbsp;</TD>
    <TD STYLE="text-align: left">&nbsp;</TD><TD STYLE="text-align: right">(26</TD><TD STYLE="text-align: left">)</TD></TR>
<TR STYLE="vertical-align: bottom; background-color: White">
    <TD STYLE="text-align: left; padding-bottom: 1pt; padding-left: 5.4pt">Net loss</TD><TD STYLE="padding-bottom: 1pt">&nbsp;</TD>
    <TD STYLE="border-bottom: Black 1pt solid; text-align: left">&nbsp;</TD><TD STYLE="border-bottom: Black 1pt solid; text-align: right">&mdash;&nbsp;&nbsp;</TD><TD STYLE="padding-bottom: 1pt; text-align: left">&nbsp;</TD><TD STYLE="padding-bottom: 1pt">&nbsp;</TD>
    <TD STYLE="border-bottom: Black 1pt solid; text-align: left">&nbsp;</TD><TD STYLE="border-bottom: Black 1pt solid; text-align: right">&mdash;&nbsp;&nbsp;</TD><TD STYLE="padding-bottom: 1pt; text-align: left">&nbsp;</TD><TD STYLE="padding-bottom: 1pt">&nbsp;</TD>
    <TD STYLE="border-bottom: Black 1pt solid; text-align: left">&nbsp;</TD><TD STYLE="border-bottom: Black 1pt solid; text-align: right">&mdash;&nbsp;&nbsp;</TD><TD STYLE="padding-bottom: 1pt; text-align: left">&nbsp;</TD><TD STYLE="padding-bottom: 1pt">&nbsp;</TD>
    <TD STYLE="border-bottom: Black 1pt solid; text-align: left">&nbsp;</TD><TD STYLE="border-bottom: Black 1pt solid; text-align: right">(1,004</TD><TD STYLE="padding-bottom: 1pt; text-align: left">)</TD><TD STYLE="padding-bottom: 1pt">&nbsp;</TD>
    <TD STYLE="border-bottom: Black 1pt solid; text-align: left">&nbsp;</TD><TD STYLE="border-bottom: Black 1pt solid; text-align: right">&mdash;&nbsp;&nbsp;</TD><TD STYLE="padding-bottom: 1pt; text-align: left">&nbsp;</TD><TD STYLE="padding-bottom: 1pt">&nbsp;</TD>
    <TD STYLE="border-bottom: Black 1pt solid; text-align: left">&nbsp;</TD><TD STYLE="border-bottom: Black 1pt solid; text-align: right">(1,004</TD><TD STYLE="padding-bottom: 1pt; text-align: left">)</TD></TR>
<TR STYLE="vertical-align: bottom; background-color: rgb(204,238,255)">
    <TD STYLE="font-weight: bold; padding-bottom: 1pt; padding-left: 5.4pt">Balance at March 31, 2018</TD><TD STYLE="font-weight: bold; padding-bottom: 1pt">&nbsp;</TD>
    <TD STYLE="border-bottom: Black 1pt solid; font-weight: bold; text-align: left">&nbsp;</TD><TD STYLE="border-bottom: Black 1pt solid; font-weight: bold; text-align: right">58,381,952</TD><TD STYLE="padding-bottom: 1pt; font-weight: bold; text-align: left">&nbsp;</TD><TD STYLE="font-weight: bold; padding-bottom: 1pt">&nbsp;</TD>
    <TD STYLE="border-bottom: Black 1pt solid; font-weight: bold; text-align: left">$</TD><TD STYLE="border-bottom: Black 1pt solid; font-weight: bold; text-align: right">584</TD><TD STYLE="padding-bottom: 1pt; font-weight: bold; text-align: left">&nbsp;</TD><TD STYLE="font-weight: bold; padding-bottom: 1pt">&nbsp;</TD>
    <TD STYLE="border-bottom: Black 1pt solid; font-weight: bold; text-align: left">$</TD><TD STYLE="border-bottom: Black 1pt solid; font-weight: bold; text-align: right">69,296</TD><TD STYLE="padding-bottom: 1pt; font-weight: bold; text-align: left">&nbsp;</TD><TD STYLE="font-weight: bold; padding-bottom: 1pt">&nbsp;</TD>
    <TD STYLE="border-bottom: Black 1pt solid; font-weight: bold; text-align: left">$</TD><TD STYLE="border-bottom: Black 1pt solid; font-weight: bold; text-align: right">(40,771</TD><TD STYLE="padding-bottom: 1pt; font-weight: bold; text-align: left">)</TD><TD STYLE="font-weight: bold; padding-bottom: 1pt">&nbsp;</TD>
    <TD STYLE="border-bottom: Black 1pt solid; font-weight: bold; text-align: left">$</TD><TD STYLE="border-bottom: Black 1pt solid; font-weight: bold; text-align: right">&mdash;&nbsp;&nbsp;</TD><TD STYLE="padding-bottom: 1pt; font-weight: bold; text-align: left">&nbsp;</TD><TD STYLE="font-weight: bold; padding-bottom: 1pt">&nbsp;</TD>
    <TD STYLE="border-bottom: Black 1pt solid; font-weight: bold; text-align: left">$</TD><TD STYLE="border-bottom: Black 1pt solid; font-weight: bold; text-align: right">29,109</TD><TD STYLE="padding-bottom: 1pt; font-weight: bold; text-align: left">&nbsp;</TD></TR>
</TABLE>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0; text-indent: 0.5in">Solitario adopted ASU No. 2016-01
in the first quarter of 2018. Solitario recorded a cumulative-effect adjustment for the change in accounting principle to retained
earnings of $576,000 related to the adoption of ASU 2016-01. In addition, Solitario eliminated its previously recorded gain on
sale of marketable equity securities of $221,000 in its consolidated statement of operations for the three months ended March 31,
2017 resulting in an adjusted unrealized gain on marketable equity securities of $128,000 for the three months ended March 31,
2017 as a result of the adoption of ASU 2016-01. These changes increased the net loss for the three months ended March 31, 2017
from $13,000 to $106,000. These changes as a result of the adoption of ASU 2016-01 were similarly reflected in the adjustment to
net income for marketable equity securities in the statement of cash flows for the three months ended March 31, 2017.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0; text-indent: 0.5in">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0"><U>Share Repurchase Program</U></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0; text-indent: 0.5in">On October 28, 2015, Solitario&#8217;s
Board of Directors approved a share repurchase program that authorized Solitario to purchase up to two million shares of its outstanding
common stock. During 2017, Solitario&#8217;s Board of Directors extended the expiration date of the share repurchase program through
December 31, 2018. During the three months ended March 31, 2018 and 2017, Solitario purchased 52,614 and 8,400 shares of Solitario
common stock, respectively, for an aggregate purchase price of $26,000 and $6,000, respectively. As of March 31, 2018, Solitario
has purchased a total of 720,414 shares for an aggregate purchase price of $374,000 under the share repurchase program since its
inception.</P>




<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0"><B>10.&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Subsequent
Event</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0; text-indent: 0.5in">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0; text-indent: 0.5in">On April 27, 2018 Solitario, through
its wholly-owned subsidiary, Minera Solitario Peru, S.A.C., sold its non-producing Yanacocha royalty to Minera Los Topados S.A.,
a wholly-owned subsidiary of Newmont Mining Corporation for $502,000 in cash.</P>

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<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0; text-indent: 0.5in">Item 2.&nbsp;&nbsp;&nbsp;<U>Management&#8217;s
Discussion and Analysis of Financial Condition and Results of Operations</U></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0; text-indent: 0.5in">The following discussion should be
read in conjunction with the information contained in the consolidated financial statements of Solitario for the years ended December
31, 2017 and 2016, and Management&#8217;s Discussion and Analysis of Financial Condition and Results of Operations contained in
Solitario&#8217;s Annual Report on Form 10-K for the year ended December 31, 2017. Solitario's financial condition and results
of operations are not necessarily indicative of what may be expected in future periods. Unless otherwise indicated, all references
to dollars are to U.S. dollars.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0">&nbsp;</P>

<P STYLE="font: bold 10pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0; text-align: left">(a) Business Overview and Summary</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0; text-indent: 0.5in">We are an exploration stage company
under Industry Guide 7, as issued by the SEC with a focus of the acquisition of precious and base metal properties with exploration
potential and the development or purchase of royalty interests. Upon the completion of the Acquisition, we have shifted our focus
toward the acquisition and exploration of zinc-related exploration mineral properties. However, we will continue to evaluate other
mineral properties for acquisition and hold a portfolio of mineral exploration properties and assets for future sale, joint venture
or to create a royalty prior to the establishment of proven and probable reserves. Although our mineral properties may be developed
in the future by us, through a joint venture or by a third party, we have never developed a mineral property. In addition to focusing
our mineral exploration properties and the evaluation of mineral properties for acquisition or purchase of royalty interests, we
also evaluate strategic transactions for the acquisition of new precious and base metal properties and assets with exploration
potential.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0; text-indent: 0.5in">We have recorded revenue in the past
from the sale of mineral properties, including the sale of MH-LLC during 2015, joint venture property payments and the sale of
a royalty on our former Mt. Hamilton property. Proceeds from the sale or joint venture of our properties, although significant,
have not historically been a consistent annual source of cash or revenue and would occur, if at all, on an infrequent basis in
the future. We have reduced our exposure to the costs of our exploration activities in the past through the use of joint ventures.
Although we anticipate the use of joint venture funding for some of our exploration activities will continue for the foreseeable
future, we can provide no assurance that these or other sources of capital will be available in sufficient amounts to meet our
needs, if at all.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0; text-indent: 0.5in">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0; text-indent: 0.5in">We currently consider our carried
interest in our Florida Canyon project in Peru and our interest in the Lik project in Alaska to be our core mineral property assets.
We expect our joint venture partner will continue the exploration development and furtherance of the Florida Canyon project and
we will monitor progress at Florida Canyon. We are planning a joint 2018 exploration program at the Lik project with Teck, our
50% partner at Lik. In addition, at March 31, 2018, we have one exploration property in Peru, and one royalty property in each
of Peru, Brazil, United States and Mexico. We are conducting independent exploration activities in Peru and through joint ventures
operated by our partners in Peru and the United States. We conduct potential acquisition evaluations in other countries of both
South and North America.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0; text-indent: 0.5in">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0; text-indent: 0.5in"><FONT STYLE="color: windowtext">As
of March 31, 2018, we have significant balances of cash and short-term investments that we anticipate using, in part, to further
the development of the Lik project and to potentially acquire additional mineral property assets. The</FONT> fluctuations in precious
metal and other commodity prices contribute to a challenging environment for mineral exploration and development, which has created
opportunities as well as challenges for the potential acquisition of advanced mineral exploration projects or other related assets
at potentially attractive terms.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0">&nbsp;</P>

<P STYLE="font: bold 10pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0; text-align: left">(b) Results of Operations</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0"><U>Comparison of the quarter ended March 31, 2018 to
the quarter ended March 31, 2017</U></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0; text-indent: 0.5in">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0; text-indent: 0.5in">We had a net loss of $1,004,000
or $0.02 per basic and diluted share for the three months ended March 31, 2018 compared to a net loss of $106,000 or $0.00 per
basic and diluted share for the three months ended March 31, 2017. As explained in more detail below, the primary reasons for
the increase in the net loss in the three months ended March 31, 2018 compared to the loss in the first three months of 2017 were
(i) a an increase in general and administrative expenses to $403,000 during the three months ended March 31, 2018 compared to
general and administrative costs of $300,000 during the three months ended March 31, 2017; (ii) the recording of a non-cash loss
on unrealized loss on marketable equity securities of $441,000 during the three months ended March 31, 2018 compared to a non-cash
unrealized gain on marketable equity securities of $128,000 during the three months ended March 31, 2017; (iii) a decrease in
interest income to $26,000 during the three months ended March 31, 2018 compared to interest income of $46,000 during the three
months ended March 31, 2017; (iv) an increase in exploration expense to $180,000 during the three months ended March 31, 2018
compared to exploration expense of $151,000 during the three months ended March 31, 2017; and (v) a gain on derivative instruments
of $172,000 during the three months ended March 31, 2017 with no similar item during the three months ended March 31, 2018. Each
of the major components of these items is discussed in more detail below.</P>

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<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0; text-indent: 0.5in">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Our
net exploration expense increased to $180,000 during the three months ended March 31, 2018 compared to exploration expense of $151,000
during the three months ended March 31, 2018. We increased our reconnaissance exploration activities primarily related to the evaluation
of mineral properties and / or entities for potential acquisition or other strategic transactions. In addition, we increased our
reconnaissance exploration activities in Peru for the same purpose. During the three months ended March 31, 2018 we had three contract
geologists in Peru, and our Denver personnel spent a majority of their time on reconnaissance exploration activities described
above and related matters. We anticipate we will continue with our current exploration activities, and, in addition, we have budgeted
additional exploration expenditures related to our Lik project and our Florida Canyon project, and to the extent we acquire any
new exploration projects, to expand those activities further. As a result, we expect our full-year exploration expenditures for
2018 to exceed the expenditures for full-year 2017.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0">Exploration expense (in thousands) by project for the three months
ended March 31, 2018 and 2017 consisted of the following:</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0">&nbsp;</P>

<TABLE CELLPADDING="0" CELLSPACING="0" STYLE="border-collapse: collapse; width: 100%; font: 10pt Times New Roman, Times, Serif">
<TR STYLE="vertical-align: bottom">
    <TD STYLE="text-align: justify">&nbsp;</TD><TD>&nbsp;</TD>
    <TD COLSPAN="3" STYLE="text-align: center">March 31,</TD><TD>&nbsp;</TD>
    <TD COLSPAN="3" STYLE="text-align: center">March 31,</TD></TR>
<TR STYLE="vertical-align: bottom">
    <TD STYLE="text-align: justify; border-bottom: Black 1pt solid">Project Name</TD><TD STYLE="padding-bottom: 1pt">&nbsp;</TD>
    <TD COLSPAN="3" STYLE="text-align: center; border-bottom: Black 1pt solid">2018</TD><TD STYLE="padding-bottom: 1pt">&nbsp;</TD>
    <TD COLSPAN="3" STYLE="text-align: center; border-bottom: Black 1pt solid">2017</TD></TR>
<TR STYLE="vertical-align: bottom; background-color: rgb(204,238,255)">
    <TD STYLE="width: 56%; text-align: justify; padding-left: 5.4pt">Florida Canyon</TD><TD STYLE="width: 8%">&nbsp;</TD>
    <TD STYLE="width: 1%; text-align: left">$</TD><TD STYLE="width: 12%; text-align: right">14</TD><TD STYLE="width: 1%; text-align: left">&nbsp;</TD><TD STYLE="width: 8%">&nbsp;</TD>
    <TD STYLE="width: 1%; text-align: left">$</TD><TD STYLE="width: 12%; text-align: right">20</TD><TD STYLE="width: 1%; text-align: left">&nbsp;</TD></TR>
<TR STYLE="vertical-align: bottom; background-color: White">
    <TD STYLE="text-align: justify; padding-left: 5.4pt">Lik</TD><TD>&nbsp;</TD>
    <TD STYLE="text-align: left">&nbsp;</TD><TD STYLE="text-align: right">15</TD><TD STYLE="text-align: left">&nbsp;</TD><TD>&nbsp;</TD>
    <TD STYLE="text-align: left">&nbsp;</TD><TD STYLE="text-align: right">&mdash;&nbsp;&nbsp;</TD><TD STYLE="text-align: left">&nbsp;</TD></TR>
<TR STYLE="vertical-align: bottom; background-color: rgb(204,238,255)">
    <TD STYLE="text-align: justify; padding-left: 5.4pt">La Promesa</TD><TD>&nbsp;</TD>
    <TD STYLE="text-align: left">&nbsp;</TD><TD STYLE="text-align: right">29</TD><TD STYLE="text-align: left">&nbsp;</TD><TD>&nbsp;</TD>
    <TD STYLE="text-align: left">&nbsp;</TD><TD STYLE="text-align: right">5</TD><TD STYLE="text-align: left">&nbsp;</TD></TR>
<TR STYLE="vertical-align: bottom; background-color: White">
    <TD STYLE="text-align: justify; padding-bottom: 1pt; padding-left: 5.4pt">Reconnaissance</TD><TD STYLE="padding-bottom: 1pt">&nbsp;</TD>
    <TD STYLE="border-bottom: Black 1pt solid; text-align: left">&nbsp;</TD><TD STYLE="border-bottom: Black 1pt solid; text-align: right">122</TD><TD STYLE="padding-bottom: 1pt; text-align: left">&nbsp;</TD><TD STYLE="padding-bottom: 1pt">&nbsp;</TD>
    <TD STYLE="border-bottom: Black 1pt solid; text-align: left">&nbsp;</TD><TD STYLE="border-bottom: Black 1pt solid; text-align: right">126</TD><TD STYLE="padding-bottom: 1pt; text-align: left">&nbsp;</TD></TR>
<TR STYLE="vertical-align: bottom; background-color: rgb(204,238,255)">
    <TD STYLE="text-align: justify; padding-bottom: 1pt; padding-left: 5.4pt">&nbsp;&nbsp;Total exploration expense</TD><TD STYLE="padding-bottom: 1pt">&nbsp;</TD>
    <TD STYLE="border-bottom: Black 1pt solid; text-align: left">$</TD><TD STYLE="border-bottom: Black 1pt solid; text-align: right">180</TD><TD STYLE="padding-bottom: 1pt; text-align: left">&nbsp;</TD><TD STYLE="padding-bottom: 1pt">&nbsp;</TD>
    <TD STYLE="border-bottom: Black 1pt solid; text-align: left">$</TD><TD STYLE="border-bottom: Black 1pt solid; text-align: right">151</TD><TD STYLE="padding-bottom: 1pt; text-align: left">&nbsp;</TD></TR>
</TABLE>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0; text-indent: 0.5in">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0; text-indent: 0.5in">General and administrative costs,
excluding stock option compensation costs, discussed below, were $403,000 during the three months ended March 31, 2018 compared
to $300,000 during the three months ended March 31, 2017. The major components of these costs were related to (i) salaries and
benefit expense of $157,000 during the first three months of 2018 compared to salary and benefit costs of $158,000 during the three
months ended March 31, 2017; (ii) legal and accounting expenditures of $41,000 in the first three months of 2018 compared to $29,000
in the first three months of 2017; (iii) office rent and expenses of $41,000 during the three months ended March 31, 2018, compared
to $43,000 during the three months ended March 31, 2017; and (iv) travel and shareholder relation costs of $153,000 during the
first three months of 2018, which included additional stock exchange fees compared to 2017 due to our additional outstanding shares,
and additional investor relations costs during the three months ended March 31, 2018 incurred for investor presentations and providing
investors with information regarding the Acquisition, compared to $71,000 during the first three months of 2017. We anticipate
the general and administrative costs will be incurred at comparable quarterly amounts for the remainder of 2018.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0; text-indent: 0.5in">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0; text-indent: 0.5in">We recorded $10,000 of stock option
expense for the amortization of unvested grant date fair value with a credit to additional paid-in-capital during the three months
ended March 31, 2018, with no comparable stock option expense during the three months ended March 31, 2017 as we had granted no
options and had no options outstanding during the three months ended March 31, 2017.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0; text-indent: 0.5in">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0; text-indent: 0.5in">We recorded an unrealized loss on
marketable equity securities of $441,000 during the three months ended March 31, 2018 compared to an unrealized gain on marketable
equity securities of $128,000 during the three months ended March 31, 2017. The loss during the three months ended March 31, 2018
was primarily related to a decrease in the value of our holdings of 11,000,000 shares of Vendetta common stock which decreased
from a fair value of $2,190,000 at December 31, 2017 to a fair value of $1,792,000 at March 31, 2018 based on quoted market prices.
We adopted ASU No. 2016-01 in the first quarter of 2018. We recorded a cumulative-effect adjustment for the change in accounting
principle to retained earnings of $576,000 related to the adoption of ASU 2016-01. In addition, we eliminated our previously recorded
gain on sale of marketable equity securities of $221,000 in our consolidated statement of operations for the three months ended
March 31, 2017 resulting in an adjusted unrealized gain on marketable equity securities of $128,000 for the three months ended
March 31, 2017 as a result of the adoption of ASU 2016-01. These changes increased the net loss for the three months ended March
31, 2017 from $13,000 to $106,000. See Note 9, &#8220;Shareholders&#8217; Equity and Other Comprehensive Income&#8221; in the
unaudited consolidated financial statements, above.</P>

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<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0; text-indent: 0.5in">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0; text-indent: 0.5in">We recorded a gain on derivative
instruments of $172,000, during the three months ended March 31, 2017, with no similar item during the three months ended March
31, 2018. The gain during the three months ended March 31, 2017 was related to a $148,000 gain on our Vendetta Warrants primarily
as a result of an increase in the price of Vendetta common shares as quoted on the TSX Venture Exchange during the three months
ended March 31, 2017, which positively affected the fair value of the Vendetta Warrants based upon a Black-Scholes model. In addition,
during the three months ended March 31, 2017 we recorded a gain on derivative instruments related to the change in value of Kinross
covered calls of $25,000 during the three months ended March 31, 2017 related to changes in the value of Kinross calls owned during
the three months ended March 31, 2017. We do not manage or control our derivative instruments for gain or loss and generally do
not anticipate significant income or loss as a result of changes in the value of derivative instruments during the remainder of
2018.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0; text-indent: 0.5in">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0; text-indent: 0.5in">We regularly perform evaluations
of our mineral property assets to assess the recoverability of our investments in these assets. All long-lived assets are reviewed
for impairment whenever events or circumstances change which indicate the carrying amount of an asset may not be recoverable utilizing
guidelines based upon future net cash flows from the asset as well as our estimates of the geological potential of an early stage
mineral property and its related value for future sale, joint venture or development by us or others. During the three months ended
March 31, 2018 and 2017, we recorded no property impairments.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0; text-indent: 0.5in">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0; text-indent: 0.5in">At March 31, 2018 and 2017, our net
operating loss carry-forwards exceed our built-in gains on marketable equity securities resulting in a net tax asset position for
which we provide a valuation allowance for all net deferred tax assets. We recorded no income tax expense or benefit during the
three months ended March 31, 2018 or 2017. As a result of our exploration activities, we anticipate we will not have currently
payable income taxes during 2018. In addition to the valuation allowance discussed above, we provide a valuation allowance for
our foreign net operating losses, which are primarily related to our exploration activities in Peru. We anticipate we will continue
to provide a valuation allowance for these net operating losses until we are in a net tax liability position with regards to those
countries where we operate or until it is more likely than not that we will be able to realize those net operating losses in the
future.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0; text-indent: 0.5in">&nbsp;</P>

<P STYLE="font: bold 10pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0; text-align: left">(c) Liquidity and Capital Resources</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0"><U>Cash and Short-term Investments</U></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0; text-indent: 0.5in">As of March 31, 2018, we have $11,320,000
in cash and short-term investments. As of March 31, 2018, we have invested $9,976,000 of our current assets in USTS with maturities
of 15 days to 21 months. The USTS are recorded at their fair value, based upon quoted market prices. As of March 31, 2018, we have
invested $1,247,000 in separate CDs with maximum values of $250,000, each of which is covered by FDIC insurance to the full-face
value of the CDs. At March 31, 2017, the CDs have maturities of between 4 and 15 months. The CDs are recorded at their fair value,
based upon quoted market prices. We anticipate we will roll over that portion of our USTS and CDs not used for exploration expenditures,
operating costs or mineral property acquisitions as they become due during the remainder of 2018.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0; text-indent: 0.5in">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0; text-indent: 0.5in">We intend to utilize a portion of
our cash and short-term investments in our exploration activities and the potential acquisition of mineral assets over the next
several years. We also expect to use a portion of our cash to repurchase shares of our common stock pursuant to the terms of a
stock buy-back program announced on October 28, 2015, and discussed above in Note 9, &#8220;Shareholders&#8217; Equity and Accumulated
Other Comprehensive Income&#8221; to the unaudited consolidated financial statements. The stock buy-back program may be terminated
at any time and does not require Solitario to purchase a minimum number of shares.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0">&nbsp;</P>

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<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0"><U>Investment in Marketable Equity Securities</U></P>




<P STYLE="font: 12pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0; text-indent: 0.5in">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0; text-indent: 0.5in">Our marketable equity securities
are classified as available-for-sale and are carried at fair value, which is based upon market quotes of the underlying securities.
At March 31, 2018 we own 11,000,000 shares of Vendetta common stock and 100,000 shares of Kinross common stock. The Vendetta shares
are recorded at their fair market value of $1,792,000 and the Kinross shares are recorded at their fair value of $395,000 at March
31, 2018. In addition, we own other marketable equity securities with a fair market value of $15,000 at March 31, 2018. We did
not sell any of our marketable equity securities during the three months ended March 31, 2018. During the three months ended March
31, 2017, we sold 1,480,000 common shares of Vendetta for proceeds of $259,000. During the three months ended March 31, 2017 we
exercised 2,240,000 of the Vendetta Warrants we held and received 2,240,000 Vendetta common shares, by paying $167,000 (Cdn$224,000)
to Vendetta. The recorded cost of the shares received from the exercise of the Vendetta Warrants was recorded based upon the total
of the (i) exercise price of the Vendetta Warrants exercised, $167,000, and (ii) the fair value of the Vendetta Warrants on the
date of exercise, which equaled their intrinsic value, $309,000, for a total value of $476,000.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0; text-indent: 0.5in">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0"><U>Working Capital</U></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-indent: 0.5in">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0; text-indent: 0.5in">We had working capital of $13,450,000
at March 31, 2018 compared to working capital of $14,499,000 as of December 31, 2017. Our working capital at March 31, 2018 consists
primarily of our cash and cash equivalents, our investment in USTS and CDs, discussed above, and our investment in marketable equity
securities of $2,202,000, less our accounts payable of $165,000. As of March 31, 2018, our cash balances along with our short-term
investments and marketable equity securities are adequate to fund our expected expenditures over the next year.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0; text-indent: 0.5in">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0; text-indent: 0.5in">The nature of the mineral exploration
business requires significant sources of capital to fund exploration, development and operation of mining projects. We will need
additional capital if we decide to develop or operate any of our current exploration projects or any projects or assets we may
acquire. We anticipate we would finance any such development through the use of our cash reserves, short-term investments, joint
ventures, issuance of debt or equity, or the sale of other exploration projects or assets.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0; text-indent: 0.5in">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0"><U>Stock-Based Compensation Plans</U></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0; text-indent: 0.5in">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0; text-indent: 0.5in">As of March 31, 2018, and December
31, 2017 there were options outstanding that are exercisable to acquire 2,082,428 and 1,928,428 shares of Solitario common stock,
respectively, with exercise prices between $0.54 per share and $1.74 per share. Of these, 1,728,428 shares were Replacement Options
granted in connection with the Acquisition. We do not anticipate the exercise of options during the remainder of 2018.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0; text-indent: 0.5in">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0"><U>Share Repurchase Program</U></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0; text-indent: 0.5in">On October 28, 2015, our Board of
Directors approved a share repurchase program that authorized us to purchase up to two million shares of our outstanding common
stock. During 2017, our Board of Directors extended the term of the share repurchase program until December 31, 2018. All shares
purchased to date have been cancelled and reduced the number of shares of outstanding common stock. The amount and timing of any
shares purchased has been and will be determined by our management and the purchases will be effected in the open market or in
privately negotiated transactions based upon market conditions and other factors, including price, regulatory requirements and
capital availability and in compliance with applicable state and federal securities laws. Purchases may also be made in accordance
with Rule 10b-18 of the Securities Exchange Act of 1934, as amended (the &#8220;1934 Act&#8221;). The repurchase program does not
require the purchase of any minimum number of shares of common stock by the Company, and may be suspended, modified or discontinued
at any time without prior notice. No purchases will be made outside of the United States, including on the TSX. Payments for shares
of common stock repurchased under the program have been funded using the Company&#8217;s working capital. As of March 31, 2018,
Solitario has purchased a total of 720,414 shares for an aggregate purchase price of $374,000 under the share repurchase program
since its inception and these shares are no longer included in our issued and outstanding shares. We anticipate we will continue
to purchase a limited number of shares under the share repurchase plan during 2018 as determined by management.</P>

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<P STYLE="font: bold 10pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0; text-align: left">(d) Cash Flows</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0; text-indent: 0.5in">Net cash used in operations during
the three months ended March 31, 2018 increased to $491,000 compared to $385,000 for the three months ended March 31, 2017 primarily
as a result of (i) an increase in general and administrative expense to $403,000 during the three months ended March 31, 2018 compared
to $300,000 during the three months ended March 31, 2017 ; (ii) an increase in exploration expenses to $180,000 during the three
months ended March 31, 2018 compared to $151,000 during 2017; and (iii) a decrease in interest income during the three months ended
March 31, 2018 to $26,000 compared to $46,000 during the three months ended March 31, 2017. Based upon projected expenditures in
our 2018 budget, we anticipate continued use of funds from operations through the remainder of 2018, primarily for exploration
related to our Florida Canyon project, our Lik project and reconnaissance exploration. See &#8220;Results of Operations&#8221;
discussed above for further explanation of some of these variances.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0; text-indent: 0.5in">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0; text-indent: 0.5in">During the three months ended March
31, 2018, we provided $408,000 in cash from investing activities compared to the provision of $363,000 of cash from investing activities
during the three months ended March 31, 2017. The primary sources of cash related to (i) the net proceeds from short-term investment
sales and purchases of $408,000 and $246,000, respectively, during 2018 and 2017; (iii) the sale of Vendetta shares for proceeds
of $259,000 during the three months ended March 31, 2017, with no similar sale during the three months ended March 31, 2018 and
(iv) the sale of Kinross calls of $25,000 during the three months ended March 31, 2017, with no similar sale during the three months
ended March 31, 2018. During the three months ended March 31, 2018 we purchased $8,000 of office equipment. During the three months
ended March 31, 2017 we used $167,000 of cash for the purchase of the Vendetta shares discussed above. We do not anticipate significant
continued sales of marketable equity securities during the remainder of 2018, however we will continue to liquidate a portion of
our investments in USTS and CDs as needed to fund our operations and or potential mineral property acquisitions during the remainder
of 2018. Any potential mineral property acquisition or strategic corporate investment during the remainder of 2018, discussed above
under &#8220;Business Overview and Summary,&#8221; could involve a significant change in our cash provided or used for investing
activities, depending on the structure of any potential transaction.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0; text-indent: 0.5in">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0; text-indent: 0.5in">We used $26,000 and $6,000, respectively,
for the purchase of our common stock during the three months ended March 31, 2018 and 2017, as discussed above under &#8220;Share
Repurchase Program&#8221; in &#8220;Liquidity and Capital Resources.&#8221; We anticipate the use of funds for additional purchases
of our common stock during the remainder of 2018, however, this will be limited to the maximum number of shares, permissible under
to the share repurchase program.</P>

<P STYLE="font: bold 10pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0; text-align: left; text-indent: 0.5in">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0"><B>(e) Off-balance sheet arrangements</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0; text-indent: 0.5in">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0; text-indent: 0.5in">As of March 31, 2018, and December
31, 2017 we have no off-balance sheet obligations.</P>

<P STYLE="font: bold 10pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0; text-align: left; text-indent: 0.5in">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0"><B>(f) Development Activities, Exploration Activities,
Environmental Compliance and Contractual Obligations</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0; text-indent: 0.5in">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0; text-indent: 0.5in">We are not involved in any development
activities, nor do we have any contractual obligations related to any potential development activities as of March 31, 2018. As
of March 31, 2018, there have been no changes to our exploration activities, environmental compliance or other contractual obligations
from those disclosed in our Management&#8217;s Discussion and Analysis included in our Annual Report on Form 10-K for the year
ended December 31, 2017.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0; text-indent: 0.5in">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0"><B>(g) Discontinued Projects</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0; text-indent: 0.5in">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0; text-indent: 0.5in">We did not record any mineral property
write-downs during the three months ended March 31, 2018 and 2017.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0; text-indent: 0.5in">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0"><B>(h) Critical Accounting Estimates</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0; text-indent: 0.5in"><B>&nbsp;</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0; text-indent: 0.5in">Management&#8217;s Discussion and
Analysis of Financial Condition and Results of Operations and Note 1 to the Consolidated Financial Statements included in our
Annual Report on Form 10-K for the year ended December 31, 2017, describe the significant accounting estimates and policies used
in preparation of our consolidated financial statements. Actual results in these areas could differ from management&#8217;s estimates.
During the three months ended March 31, 2018, Solitario adopted ASU No. 2016-01. Solitario recorded an accumulated effect of the
change in accounting principle to retained earnings of $576,000 related to the adoption of ASU 2016-01. See Note 9, &#8220;Shareholders&#8217;
Equity and Accumulated Other Comprehensive Income&#8221; to the unaudited consolidated financial statements, for a discussion
of ASU 2016-01.</P>

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<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0"></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0; text-indent: 0.5in">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0"><B>(i) Related Party Transactions</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0; text-indent: 0.5in"><B>&nbsp;</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0; text-indent: 0.5in">As of March 31, 2018, and for the
three months ended March 31, 2018, we have no related party transactions or balances.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0; text-indent: 0.5in"><B>&nbsp;</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0"><B>(j) Recent Accounting Pronouncements</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0; text-indent: 0.5in">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0; text-indent: 0.5in">See Note 1, &#8220;Business and Summary
of Significant Accounting Policies,&#8221; to the unaudited consolidated financial statements under <I>Recent Accounting Pronouncements&#8221;</I>
above for a discussion of our significant accounting policies.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0; text-indent: 0.5in"><B>&nbsp;</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0"><B>(k) Forward Looking Statements</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0; text-indent: 0.5in"><B>&nbsp;</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0; text-indent: 0.5in">This Form 10-Q contains forward-looking
statements, within the meaning of Section&nbsp;27A of the Securities Act of 1933, as amended and Section&nbsp;21E of the 1934 Act
with respect to our financial condition, results of operations, business prospects, plans, objectives, goals, strategies, future
events, capital expenditures, and exploration and development efforts. Words such as &#8220;anticipates,&#8221; &#8220;expects,&#8221;
&#8220;intends,&#8221; &#8220;forecasts,&#8221; &#8220;plans,&#8221; &#8220;believes,&#8221; &#8220;seeks,&#8221; &#8220;estimates,&#8221;
&#8220;may,&#8221; &#8220;will,&#8221; and similar expressions identify forward-looking statements. These forward-looking statements
are based on our current expectations and assumptions about future events and are based on currently available information as to
the outcome and timing of future events. When considering forward-looking statements, you should keep in mind the risk factors
and other cautionary statements described under the heading &quot;Risk Factors&quot; included in Item 1A of Part&nbsp;I of our
Annual Report on Form&nbsp;10-K for the year ended December 31, 2017.&nbsp;These forward-looking statements appear in a number
of places in this report and include statements with respect to, among other things:</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0; text-indent: 0.5in">&nbsp;</P>

<TABLE CELLPADDING="0" CELLSPACING="0" WIDTH="100%" STYLE="font: 11pt/115% Calibri, Helvetica, Sans-Serif; margin-top: 0; margin-bottom: 10pt"><TR STYLE="vertical-align: top">
<TD STYLE="width: 0.5in"></TD><TD STYLE="width: 0.5in"><FONT STYLE="font-family: Symbol; font-size: 10pt">&middot;</FONT></TD><TD STYLE="padding-right: 0.55in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">Our estimates of the
value and recovery of our short-term investments;</FONT></TD></TR></TABLE>

<TABLE CELLPADDING="0" CELLSPACING="0" WIDTH="100%" STYLE="font: 11pt/115% Calibri, Helvetica, Sans-Serif; margin-top: 0; margin-bottom: 10pt"><TR STYLE="vertical-align: top">
<TD STYLE="width: 0.5in"></TD><TD STYLE="width: 0.5in"><FONT STYLE="font-family: Symbol; font-size: 10pt">&middot;</FONT></TD><TD STYLE="padding-right: 0.55in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">Our estimates of future
exploration, development, general and administrative and other costs;</FONT></TD></TR></TABLE>

<TABLE CELLPADDING="0" CELLSPACING="0" WIDTH="100%" STYLE="font: 11pt/115% Calibri, Helvetica, Sans-Serif; margin-top: 0; margin-bottom: 10pt"><TR STYLE="vertical-align: top">
<TD STYLE="width: 0.5in"></TD><TD STYLE="width: 0.5in"><FONT STYLE="font-family: Symbol; font-size: 10pt">&middot;</FONT></TD><TD STYLE="padding-right: 0.55in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">Our ability to realize
a return on our investment in the Lik project acquired in the Acquisition;</FONT></TD></TR></TABLE>

<TABLE CELLPADDING="0" CELLSPACING="0" WIDTH="100%" STYLE="font: 11pt/115% Calibri, Helvetica, Sans-Serif; margin-top: 0; margin-bottom: 10pt"><TR STYLE="vertical-align: top">
<TD STYLE="width: 0.5in"></TD><TD STYLE="width: 0.5in"><FONT STYLE="font-family: Symbol; font-size: 10pt">&middot;</FONT></TD><TD STYLE="padding-right: 0.55in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">Our ability to successfully
identify, and execute on transactions to acquire new mineral exploration properties and other related assets;</FONT></TD></TR></TABLE>

<TABLE CELLPADDING="0" CELLSPACING="0" WIDTH="100%" STYLE="font: 11pt/115% Calibri, Helvetica, Sans-Serif; margin-top: 0; margin-bottom: 10pt"><TR STYLE="vertical-align: top">
<TD STYLE="width: 0.5in"></TD><TD STYLE="width: 0.5in"><FONT STYLE="font-family: Symbol; font-size: 10pt">&middot;</FONT></TD><TD STYLE="padding-right: 0.55in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">Our estimates of fair
value of our investment in shares of Vendetta and Kinross;</FONT></TD></TR></TABLE>

<TABLE CELLPADDING="0" CELLSPACING="0" WIDTH="100%" STYLE="font: 11pt/115% Calibri, Helvetica, Sans-Serif; margin-top: 0; margin-bottom: 10pt"><TR STYLE="vertical-align: top">
<TD STYLE="width: 0.5in"></TD><TD STYLE="width: 0.5in"><FONT STYLE="font-family: Symbol; font-size: 10pt">&middot;</FONT></TD><TD STYLE="padding-right: 0.55in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">Our expectations regarding
development and exploration of our properties, including those subject to joint venture and shareholder agreements;</FONT></TD></TR></TABLE>

<TABLE CELLPADDING="0" CELLSPACING="0" WIDTH="100%" STYLE="font: 11pt/115% Calibri, Helvetica, Sans-Serif; margin-top: 0; margin-bottom: 10pt"><TR STYLE="vertical-align: top">
<TD STYLE="width: 0.5in"></TD><TD STYLE="width: 0.5in"><FONT STYLE="font-family: Symbol; font-size: 10pt">&middot;</FONT></TD><TD STYLE="padding-right: 0.55in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">The impact of political
and regulatory developments;</FONT></TD></TR></TABLE>

<TABLE CELLPADDING="0" CELLSPACING="0" WIDTH="100%" STYLE="font: 11pt/115% Calibri, Helvetica, Sans-Serif; margin-top: 0; margin-bottom: 10pt"><TR STYLE="vertical-align: top">
<TD STYLE="width: 0.5in"></TD><TD STYLE="width: 0.5in"><FONT STYLE="font-family: Symbol; font-size: 10pt">&middot;</FONT></TD><TD STYLE="padding-right: 0.55in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">Our future financial
condition or results of operations and our future revenues and expenses; and</FONT></TD></TR></TABLE>

<TABLE CELLPADDING="0" CELLSPACING="0" WIDTH="100%" STYLE="font: 11pt/115% Calibri, Helvetica, Sans-Serif; margin-top: 0; margin-bottom: 0"><TR STYLE="vertical-align: top">
<TD STYLE="width: 0.5in"></TD><TD STYLE="width: 0.5in"><FONT STYLE="font-family: Symbol; font-size: 10pt">&middot;</FONT></TD><TD STYLE="padding-right: 0.55in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">Our business strategy
and other plans and objectives for future operations.</FONT></TD></TR></TABLE>

<P STYLE="font: 10pt/115% Times New Roman, Times, Serif; margin: 0 0.55in 0 1in; text-indent: -0.5in">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0; text-indent: 0.5in">Although we have attempted to identify
important factors that could cause actual results to differ materially from those described in forward-looking statements, there
may be other factors that cause results not to be as anticipated, estimated or intended. There can be no assurance that these statements
will prove to be accurate as actual results and future events could differ materially from those anticipated in the statements.
Except as required by law, we assume no obligation to publicly update any forward-looking statements, whether as a result of new
information, future events or&nbsp;otherwise.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0; text-indent: 0.5in">&nbsp;</P>

<P STYLE="font: 10pt/89% Times New Roman, Times, Serif; margin: 0 0.55in 0 0">Item 3.&nbsp;&nbsp;&nbsp;<U>Quantitative and Qualitative
Disclosures about Market Risk</U></P>

<P STYLE="font: 10pt/85% Times New Roman, Times, Serif; margin: 0; text-indent: 0.5in"><B>&nbsp;</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0; text-indent: 0.5in">Smaller Reporting Companies are not
required to provide the information required by this item.</P>

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<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0"></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-indent: 0.5in">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0; text-indent: 10.5pt">Item 4.&nbsp;&nbsp;&nbsp;<U>Controls
and Procedures</U></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0; text-indent: 0.5in">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0"><I>Disclosure Controls and Procedures</I></P>




<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0; text-indent: 0.5in">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0; text-indent: 0.5in">As required by Rule 13a-15 under
the 1934 Act, as of March 31, 2018, we carried out an evaluation of the effectiveness of the design and operation of our disclosure
controls and procedures. This evaluation was carried out under the supervision and with the participation of our Chief Executive
Officer (our principal executive officer) and our Chief Financial Officer (our principal financial officer). Based upon and as
of the date of that evaluation, our Chief Executive Officer and Chief Financial Officer concluded that our disclosure controls
and procedures were effective as of March 31, 2018.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0; text-indent: 0.5in">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0; text-indent: 0.5in">Disclosure controls and procedures
are controls and other procedures that are designed to ensure that information required to be disclosed in our reports filed or
submitted under the 1934 Act is recorded, processed, summarized and reported within the time periods specified in the SEC&#8217;s
rules and forms. Disclosure controls and procedures include, without limitation, controls and procedures designed to ensure that
information required to be disclosed in our reports filed under the 1934 Act is accumulated and communicated to our management,
including our principal executive officer and our principal financial officer, as appropriate, to allow timely decisions regarding
required disclosure.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0; text-indent: 0.5in">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0; text-align: justify"><I>Changes in Internal Control Over
Financial Reporting</I></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 0.55in 0 7.5pt; text-indent: 0.5in">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0; text-indent: 0.5in">There were no changes in our internal
control over financial reporting (as defined in Rules 13a-15(f) and 15d-15(f) promulgated under the 1934 Act) during the quarter
ended March 31, 2018 that have materially affected, or are reasonably likely to materially affect, our internal control over financial
reporting.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0; text-indent: 0.5in">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-indent: 0.5in">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0">PART II - OTHER INFORMATION</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-indent: 0.5in">&nbsp;</P>

<TABLE CELLPADDING="0" CELLSPACING="0" WIDTH="100%" STYLE="font: 10pt Times New Roman, Times, Serif; margin-top: 0; margin-bottom: 0"><TR STYLE="vertical-align: top">
<TD STYLE="width: 0"></TD><TD STYLE="width: 0.5in">Item 1.</TD><TD><U>Legal Proceedings</U></TD></TR></TABLE>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0; text-indent: 0.5in">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0; text-indent: 0.5in">None</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0; text-indent: 0.5in">&nbsp;</P>

<TABLE CELLPADDING="0" CELLSPACING="0" WIDTH="100%" STYLE="font: 10pt Times New Roman, Times, Serif; margin-top: 0; margin-bottom: 0"><TR STYLE="vertical-align: top">
<TD STYLE="width: 0"></TD><TD STYLE="width: 0.5in">Item 1A.</TD><TD STYLE="padding-right: 0.55in"><U>Risk Factors</U></TD></TR></TABLE>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0; text-indent: 0.5in">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0; text-indent: 0.5in">There are no material changes to
the Risk Factors associated with our business disclosed in Part I, Item 1A of our Annual Report on Form 10-K for the year ended
December 31, 2017.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0; text-indent: 0.5in">&nbsp;</P>

<TABLE CELLPADDING="0" CELLSPACING="0" WIDTH="100%" STYLE="font: 10pt Times New Roman, Times, Serif; margin-top: 0; margin-bottom: 0"><TR STYLE="vertical-align: top">
<TD STYLE="width: 0"></TD><TD STYLE="width: 0.5in">Item 2.</TD><TD STYLE="padding-right: 0.55in"><U>Unregistered Sales of Equity Securities and Use of Proceeds</U></TD></TR></TABLE>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0; text-indent: 0.5in">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 35.1pt 0 0">The following table provides information about our purchase
of our common shares under the share repurchase program during the three months ended March 31, 2018.</P>

<TABLE CELLPADDING="0" CELLSPACING="0" STYLE="border-collapse: collapse; width: 100%; font: 10pt Times New Roman, Times, Serif">
<TR STYLE="vertical-align: bottom">
    <TD COLSPAN="17" STYLE="font-weight: bold; text-align: center">Issuer Purchases of Equity Securities</TD></TR>
<TR STYLE="vertical-align: bottom">
    <TD STYLE="font-size: 8pt; font-weight: bold">Period</TD><TD STYLE="font-size: 8pt; font-weight: bold">&nbsp;</TD>
    <TD COLSPAN="3" STYLE="font-size: 8pt; font-weight: bold">Total Number of Shares Purchased</TD><TD STYLE="font-size: 8pt; font-weight: bold">&nbsp;</TD>
    <TD COLSPAN="3" STYLE="font-size: 8pt; font-weight: bold">Average Price Paid Per Share</TD><TD STYLE="font-size: 8pt; font-weight: bold">&nbsp;</TD>
    <TD COLSPAN="3" STYLE="font-size: 8pt; font-weight: bold">Total Number of Shares Purchased as Part of Publicly Announced Plans or Programs</TD><TD STYLE="font-size: 8pt; font-weight: bold">&nbsp;</TD>
    <TD COLSPAN="3" STYLE="font-size: 8pt; font-weight: bold"><FONT STYLE="font-size: 8pt"><B>Maximum number of Shares that May Yet Be Purchased Under the Plans or Programs<SUP>(1)</SUP></B></FONT></TD></TR>
<TR STYLE="vertical-align: bottom; background-color: rgb(204,238,255)">
    <TD STYLE="width: 40%; text-align: justify; padding-left: 3pt">January 1, 2018- January 31, 2018</TD><TD STYLE="width: 3%">&nbsp;</TD>
    <TD STYLE="width: 1%; text-align: left">&nbsp;</TD><TD STYLE="width: 10%; text-align: right">&mdash;&nbsp;&nbsp;</TD><TD STYLE="width: 1%; text-align: left">&nbsp;</TD><TD STYLE="width: 3%">&nbsp;</TD>
    <TD STYLE="width: 1%; text-align: left">&nbsp;</TD><TD STYLE="width: 10%; text-align: right">&nbsp;</TD><TD STYLE="width: 1%; text-align: left">&nbsp;</TD><TD STYLE="width: 3%">&nbsp;</TD>
    <TD STYLE="width: 1%; text-align: left">&nbsp;</TD><TD STYLE="width: 10%; text-align: right">&mdash;&nbsp;&nbsp;</TD><TD STYLE="width: 1%; text-align: left">&nbsp;</TD><TD STYLE="width: 3%">&nbsp;</TD>
    <TD STYLE="width: 1%; text-align: left">&nbsp;</TD><TD STYLE="width: 10%; text-align: right">1,332,200</TD><TD STYLE="width: 1%; text-align: left">&nbsp;</TD></TR>
<TR STYLE="vertical-align: bottom; background-color: White">
    <TD STYLE="text-align: justify; padding-left: 3pt">February 1, 2018 &ndash; February 28, 2018</TD><TD>&nbsp;</TD>
    <TD STYLE="text-align: left">&nbsp;</TD><TD STYLE="text-align: right">26,200</TD><TD STYLE="text-align: left">&nbsp;</TD><TD>&nbsp;</TD>
    <TD STYLE="text-align: left">$</TD><TD STYLE="text-align: right">0.52</TD><TD STYLE="text-align: left">&nbsp;</TD><TD>&nbsp;</TD>
    <TD STYLE="text-align: left">&nbsp;</TD><TD STYLE="text-align: right">26,200</TD><TD STYLE="text-align: left">&nbsp;</TD><TD>&nbsp;</TD>
    <TD STYLE="text-align: left">&nbsp;</TD><TD STYLE="text-align: right">1,306,000</TD><TD STYLE="text-align: left">&nbsp;</TD></TR>
<TR STYLE="vertical-align: bottom; background-color: rgb(204,238,255)">
    <TD STYLE="text-align: justify; padding-left: 3pt">March 1, 2018 &ndash; March 31, 2018</TD><TD>&nbsp;</TD>
    <TD STYLE="text-align: left">&nbsp;</TD><TD STYLE="text-align: right">26,414</TD><TD STYLE="text-align: left">&nbsp;</TD><TD>&nbsp;</TD>
    <TD STYLE="text-align: left">$</TD><TD STYLE="text-align: right">0.49</TD><TD STYLE="text-align: left">&nbsp;</TD><TD>&nbsp;</TD>
    <TD STYLE="text-align: left">&nbsp;</TD><TD STYLE="text-align: right">26,414</TD><TD STYLE="text-align: left">&nbsp;</TD><TD>&nbsp;</TD>
    <TD STYLE="text-align: left">&nbsp;</TD><TD STYLE="text-align: right">1,279,586</TD><TD STYLE="text-align: left">&nbsp;</TD></TR>
</TABLE>

<TABLE CELLPADDING="0" CELLSPACING="0" WIDTH="100%" STYLE="font: 10pt Times New Roman, Times, Serif; margin-top: 0; margin-bottom: 0"><TR STYLE="vertical-align: top">
<TD STYLE="width: 0.5in"></TD><TD STYLE="width: 0.5in">(1)</TD><TD STYLE="padding-right: 35.1pt">As of March 31, 2018, we have purchased a total of 720,414 shares for an aggregate purchase price
of $374,000 under the share repurchase program and these shares are no longer included in our issued and outstanding shares.</TD></TR></TABLE>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0; text-indent: 0.5in">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0; text-indent: 0.5in">&nbsp;</P>

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<TD STYLE="width: 0"></TD><TD STYLE="width: 0.5in">Item 3.</TD><TD STYLE="padding-right: 0.55in"><U>Defaults upon Senior Securities</U></TD></TR></TABLE>




<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0; text-indent: 0.5in">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0; text-indent: 0.5in">None</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0; text-indent: 0.5in">&nbsp;</P>

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<TD STYLE="width: 0"></TD><TD STYLE="width: 0.5in">Item 4.</TD><TD STYLE="padding-right: 0.55in"><U>Mine Safety Disclosures</U></TD></TR></TABLE>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0; text-indent: 0.5in">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0; text-indent: 0.5in">None</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0; text-indent: 0.5in">&nbsp;</P>

<TABLE CELLPADDING="0" CELLSPACING="0" WIDTH="100%" STYLE="font: 10pt Times New Roman, Times, Serif; margin-top: 0; margin-bottom: 0"><TR STYLE="vertical-align: top">
<TD STYLE="width: 0"></TD><TD STYLE="width: 0.5in">Item 5.</TD><TD STYLE="padding-right: 0.55in"><U>Other Information</U></TD></TR></TABLE>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0; text-indent: 0.5in">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0; text-indent: 0.5in">None</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0; text-indent: 0.5in">&nbsp;</P>

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<TD STYLE="width: 0"></TD><TD STYLE="width: 0.5in">Item 6.</TD><TD STYLE="padding-right: 0.55in"><U>Exhibits</U></TD></TR></TABLE>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0; text-indent: 0.5in">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0; text-indent: 0.5in">The Exhibits to this report are listed
in the Exhibit Index.</P>

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<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0"></P>




<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0; text-align: center; text-indent: 0.5in"><B>SIGNATURES</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0">Pursuant to the requirements of the Securities Exchange
Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned thereunto duly authorized.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0">SOLITARIO ZINC CORP.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0">&nbsp;</P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="width: 100%; font: 10pt Times New Roman, Times, Serif; border-collapse: collapse">
<TR STYLE="vertical-align: top">
    <TD ROWSPAN="2" STYLE="width: 48%; padding-right: 5.4pt; padding-left: 5.4pt">
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0"><U>May 2, 2018</U></P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0">Date</P></TD>
    <TD STYLE="width: 9%; padding-right: 0.55in; padding-left: 5.4pt; layout-grid-mode: line; text-align: justify">By:</TD>
    <TD ROWSPAN="3" STYLE="width: 43%; padding-right: 5.45pt; padding-left: 5.4pt; layout-grid-mode: line"><U>/s/ James R. Maronick</U><BR>
James R. Maronick<BR>
Chief Financial Officer</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="padding-right: 0.55in; padding-left: 5.4pt; layout-grid-mode: line; text-align: justify">&nbsp;</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="padding-right: 0.55in; padding-left: 5.4pt; layout-grid-mode: line; text-align: justify">&nbsp;</TD>
    <TD STYLE="padding-right: 0.55in; padding-left: 5.4pt; layout-grid-mode: line; text-align: justify">&nbsp;</TD></TR>
</TABLE>
<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0; text-align: center">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0; text-align: center"><B>EXHIBIT INDEX</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0; text-align: center"><B>&nbsp;</B></P>

<P STYLE="font: bold 10pt Times New Roman, Times, Serif; margin: 0 0.25in 0 0">&nbsp;</P>

<TABLE CELLPADDING="0" CELLSPACING="0" STYLE="border-collapse: collapse; width: 100%; font: 10pt Times New Roman, Times, Serif">
<TR STYLE="vertical-align: bottom; background-color: rgb(204,238,255)">
    <TD STYLE="width: 1%; text-align: left">&nbsp;</TD><TD STYLE="width: 18%; text-align: right">3.1</TD><TD STYLE="width: 1%; text-align: left">&nbsp;</TD><TD STYLE="width: 10%">&nbsp;</TD>
    <TD STYLE="width: 70%; text-align: left; padding-left: 5.4pt">Amended and Restated Articles of Incorporation of Solitario Exploration &amp; Royalty Corp., as Amended (incorporated by reference to Exhibit 3.1 to Solitario&rsquo;s Form 10-Q filed on August 10, 2010)</TD></TR>
<TR STYLE="vertical-align: bottom; background-color: White">
    <TD STYLE="text-align: left">&nbsp;</TD><TD STYLE="text-align: right">&nbsp;</TD><TD STYLE="text-align: left">&nbsp;</TD><TD>&nbsp;</TD>
    <TD STYLE="padding-left: 5.4pt">&nbsp;</TD></TR>
<TR STYLE="vertical-align: bottom; background-color: rgb(204,238,255)">
    <TD STYLE="text-align: left">&nbsp;</TD><TD STYLE="text-align: right">3.1.1</TD><TD STYLE="text-align: left">&nbsp;</TD><TD>&nbsp;</TD>
    <TD STYLE="text-align: left; padding-left: 5.4pt">Articles of Amendment to Restated Articles of Incorporation of Solitario Zinc Corp. (incorporated by reference to Exhibit 3.1 to Solitario&rsquo;s Current Report on Form 8-K filed on July 14, 2017)</TD></TR>
<TR STYLE="vertical-align: bottom; background-color: White">
    <TD STYLE="text-align: left">&nbsp;</TD><TD STYLE="text-align: right">&nbsp;</TD><TD STYLE="text-align: left">&nbsp;</TD><TD>&nbsp;</TD>
    <TD STYLE="padding-left: 5.4pt">&nbsp;</TD></TR>
<TR STYLE="vertical-align: bottom; background-color: rgb(204,238,255)">
    <TD STYLE="text-align: left">&nbsp;</TD><TD STYLE="text-align: right">3.2</TD><TD STYLE="text-align: left">&nbsp;</TD><TD>&nbsp;</TD>
    <TD STYLE="text-align: left; padding-left: 5.4pt">Amended and Restated By-laws of Solitario Zinc Corp. (Solitario Exploration &amp; Royalty Corp.) (incorporated by reference to Exhibit 99.1 to Solitario&rsquo;s Form 10-K filed on March 22, 2013)</TD></TR>
<TR STYLE="vertical-align: bottom; background-color: White">
    <TD STYLE="text-align: left">&nbsp;</TD><TD STYLE="text-align: right">&nbsp;</TD><TD STYLE="text-align: left">&nbsp;</TD><TD>&nbsp;</TD>
    <TD STYLE="padding-left: 5.4pt">&nbsp;</TD></TR>
<TR STYLE="vertical-align: bottom; background-color: rgb(204,238,255)">
    <TD STYLE="text-align: left">&nbsp;</TD><TD STYLE="text-align: right">4.1</TD><TD STYLE="text-align: left">&nbsp;</TD><TD>&nbsp;</TD>
    <TD STYLE="text-align: left; padding-left: 5.4pt">Form of Common Stock Certificate of Solitario Zinc Corp. (incorporated by reference to Exhibit 4.1 to Solitario&rsquo;s Form 10-Q filed on November 8, 2017)</TD></TR>
<TR STYLE="vertical-align: bottom; background-color: White">
    <TD STYLE="text-align: left">&nbsp;</TD><TD STYLE="text-align: right">&nbsp;</TD><TD STYLE="text-align: left">&nbsp;</TD><TD>&nbsp;</TD>
    <TD STYLE="padding-left: 5.4pt">&nbsp;</TD></TR>
<TR STYLE="vertical-align: bottom; background-color: rgb(204,238,255)">
    <TD STYLE="text-align: left">&nbsp;</TD><TD STYLE="text-align: right">31.1</TD><TD STYLE="text-align: left">*</TD><TD>&nbsp;</TD>
    <TD STYLE="text-align: left; padding-left: 5.4pt">Certification of Chief Executive Officer pursuant to SEC Rule 13a-14(a)/15d-14(a) as adopted pursuant to Section 302 of the Sarbanes-Oxley Act of 2002</TD></TR>
<TR STYLE="vertical-align: bottom; background-color: White">
    <TD STYLE="text-align: left">&nbsp;</TD><TD STYLE="text-align: right">&nbsp;</TD><TD STYLE="text-align: left">&nbsp;</TD><TD>&nbsp;</TD>
    <TD STYLE="padding-left: 5.4pt">&nbsp;</TD></TR>
<TR STYLE="vertical-align: bottom; background-color: rgb(204,238,255)">
    <TD STYLE="text-align: left">&nbsp;</TD><TD STYLE="text-align: right">31.2</TD><TD STYLE="text-align: left">*</TD><TD>&nbsp;</TD>
    <TD STYLE="text-align: left; padding-left: 5.4pt">Certification of Chief Financial Officer pursuant to SEC Rule 13a-14(a)/15d-14(a) as adopted pursuant to Section 302 of the Sarbanes-Oxley Act of 2002</TD></TR>
<TR STYLE="vertical-align: bottom; background-color: White">
    <TD STYLE="text-align: left">&nbsp;</TD><TD STYLE="text-align: right">&nbsp;</TD><TD STYLE="text-align: left">&nbsp;</TD><TD>&nbsp;</TD>
    <TD STYLE="padding-left: 5.4pt">&nbsp;</TD></TR>
<TR STYLE="vertical-align: bottom; background-color: rgb(204,238,255)">
    <TD STYLE="text-align: left">&nbsp;</TD><TD STYLE="text-align: right">32.1</TD><TD STYLE="text-align: left">*</TD><TD>&nbsp;</TD>
    <TD STYLE="text-align: left; padding-left: 5.4pt">Certification of Chief Executive Officer and Chief Financial Officer pursuant to 18 U.S.C Section 1350 as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002.</TD></TR>
<TR STYLE="vertical-align: bottom; background-color: White">
    <TD STYLE="text-align: left">&nbsp;</TD><TD STYLE="text-align: right">&nbsp;</TD><TD STYLE="text-align: left">&nbsp;</TD><TD>&nbsp;</TD>
    <TD STYLE="padding-left: 5.4pt">&nbsp;</TD></TR>
<TR STYLE="vertical-align: bottom; background-color: rgb(204,238,255)">
    <TD STYLE="text-align: left">&nbsp;</TD><TD STYLE="text-align: right">101</TD><TD STYLE="text-align: left">*</TD><TD>&nbsp;</TD>
    <TD STYLE="text-align: left; padding-left: 5.4pt">The following financial statements, formatted in XBRL: (i) Consolidated Balance Sheets as of March 31, 2018 and December&nbsp;31, 2017, (ii) Consolidated Statements of Operations for the three months ended March 31, 2018 and 2017, (iii) Consolidated Statements of Cash Flows for the three months ended March 31, 2018 and 2017; and (iv) Notes to the Unaudited Consolidated Financial Statements, tagged as blocks of text.</TD></TR>
<TR STYLE="vertical-align: bottom; background-color: White">
    <TD STYLE="text-align: left">&nbsp;</TD><TD STYLE="text-align: right">&nbsp;</TD><TD STYLE="text-align: left">&nbsp;</TD><TD>&nbsp;</TD>
    <TD STYLE="padding-left: 5.4pt">&nbsp;</TD></TR>
<TR STYLE="vertical-align: bottom; background-color: rgb(204,238,255)">
    <TD STYLE="text-align: left">&nbsp;</TD><TD STYLE="text-align: right">*</TD><TD STYLE="text-align: left">&nbsp;</TD><TD>&nbsp;</TD>
    <TD STYLE="text-align: left; padding-left: 5.4pt">Filed herewith</TD></TR>
</TABLE>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0"><B>&nbsp;</B></P>


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<SEQUENCE>2
<FILENAME>exh311.htm
<DESCRIPTION>CERTIFICATIONS
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<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: right"><B>Exhibit 31.1</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: center"><B>CERTIFICATIONS</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify">I, Christopher E. Herald, certify that:</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify">1.&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;I
have reviewed this quarterly report on Form 10-Q of Solitario Zinc Corp. for the three months ended March 31, 2018;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify">2.&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Based
on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary
to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to
the period covered by this report;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify">3.&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Based
on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material
respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented
in this report;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify">4.&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;The
registrant's other certifying officer(s) and I are responsible for establishing and maintaining disclosure controls and procedures
(as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) for the registrant and internal control over financial reporting (as
defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) and we have:</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.75in">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;a)
Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision,
to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by
others within those entities, particularly during the period in which this report is being prepared;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.75in">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;b)
Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed
under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of
financial statements for external purposes in accordance with generally accepted accounting principles;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.75in">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;c)
Evaluated the effectiveness of the registrant's disclosure controls and procedures and presented in this report our conclusions
about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on
such evaluation; and</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 0 0 0.5in; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.75in">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;d)
Disclosed in this report any change in the registrant's internal control over financial reporting that occurred during the registrant's
most recent fiscal quarter (the registrant's fourth fiscal quarter in the case of an annual report) that has materially affected,
or is reasonably likely to materially affect, the registrant's internal control over financial reporting; and</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify">5.&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;The
registrant's other certifying officer(s) and I have disclosed, based on our most recent evaluation of internal control over financial
reporting, to the registrant's auditors and the audit committee of the registrant's board of directors (or persons performing the
equivalent functions):</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.75in">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(a)
All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which
are reasonably likely to adversely affect the registrant's ability to record, process, summarize and report financial information;
and</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 0 0 0.5in; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.75in">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(b)
Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant's
internal control over financial reporting.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify">&nbsp;</P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="width: 100%; border-collapse: collapse">
<TR STYLE="vertical-align: top">
    <TD STYLE="width: 100%; padding-right: 5.4pt; padding-left: 5.4pt">
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; color: #333333">Date: May 2, 2018</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; color: #333333">By: /s/ Christopher E. Herald<BR>
        Christopher E. Herald<BR>
        President and Chief Executive Officer</P></TD></TR>
</TABLE>
<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0">&nbsp;</P>


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<SEQUENCE>3
<FILENAME>exh312.htm
<DESCRIPTION>CERTIFICATIONS
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<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: right"><B>Exhibit 31.2</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: center"><B>CERTIFICATIONS</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify">I, James R. Maronick, certify that:</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify">1.&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;I
have reviewed this quarterly report on Form 10-Q of Solitario Zinc Corp. for the three months ended March 31, 2018;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify">2.&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Based
on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary
to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to
the period covered by this report;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify">3.&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Based
on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material
respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented
in this report;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify">4.&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;The
registrant's other certifying officer(s) and I are responsible for establishing and maintaining disclosure controls and procedures
(as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) for the registrant and internal control over financial reporting (as
defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) and we have:</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.75in">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;a)
Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision,
to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by
others within those entities, particularly during the period in which this report is being prepared;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.75in">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;b)
Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed
under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of
financial statements for external purposes in accordance with generally accepted accounting principles;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.75in">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;c)
Evaluated the effectiveness of the registrant's disclosure controls and procedures and presented in this report our conclusions
about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on
such evaluation; and</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 0 0 0.5in; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.75in">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;d)
Disclosed in this report any change in the registrant's internal control over financial reporting that occurred during the registrant's
most recent fiscal quarter (the registrant's fourth fiscal quarter in the case of an annual report) that has materially affected,
or is reasonably likely to materially affect, the registrant's internal control over financial reporting; and</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify">5.&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;The
registrant's other certifying officer(s) and I have disclosed, based on our most recent evaluation of internal control over financial
reporting, to the registrant's auditors and the audit committee of the registrant's board of directors (or persons performing the
equivalent functions):</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.75in">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(a)
All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which
are reasonably likely to adversely affect the registrant's ability to record, process, summarize and report financial information;
and</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 0 0 0.5in; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.75in">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(b)
Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant's
internal control over financial reporting.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify">&nbsp;</P>

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    <TD STYLE="width: 100%; padding-right: 5.4pt; padding-left: 5.4pt; font: 10pt Times New Roman, Times, Serif; layout-grid-mode: line"><FONT STYLE="color: #333333">Date: May 2, 2018</FONT><BR>
<FONT STYLE="color: #333333">By: /s/ James R. Maronick</FONT><BR>
<FONT STYLE="color: #333333">James R. Maronick</FONT><BR>
<FONT STYLE="color: #333333">Chief Financial Officer</FONT></TD></TR>
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<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0">&nbsp;</P>


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<P STYLE="font: 11pt/115% Times New Roman, Times, Serif; margin: 0; text-align: right"><B>Exhibit 32</B></P>

<P STYLE="font: 11pt/115% Times New Roman, Times, Serif; margin: 0; text-align: center"><B>CERTIFICATION PURSUANT TO</B></P>

<P STYLE="font: 11pt/115% Times New Roman, Times, Serif; margin: 0; text-align: center"><B>18 U.S.C. SECTION 1350,</B></P>

<P STYLE="font: 11pt/115% Times New Roman, Times, Serif; margin: 0; text-align: center"><B>AS ADOPTED PURSUANT TO</B></P>

<P STYLE="font: 11pt/115% Times New Roman, Times, Serif; margin: 0; text-align: center"><B>SECTION 906 OF THE SARBANES-OXLEY ACT
OF 2002</B></P>

<P STYLE="font: 11pt/115% Times New Roman, Times, Serif; margin: 0">&nbsp;</P>

<P STYLE="font: 11pt/115% Times New Roman, Times, Serif; margin: 0">In connection with the Annual Report of Solitario Zinc Corp.
(the &quot;Company&quot;) on Form 10-Q for the period ended March 31, 2018, as filed with the Securities and Exchange Commission
on the date hereof (the &quot;Report&quot;), we, Christopher E. Herald, Chief Executive Officer, and James R. Maronick, Chief Financial
Officer, certify, pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that
to our knowledge:</P>

<P STYLE="font: 11pt/115% Times New Roman, Times, Serif; margin: 0">&nbsp;</P>

<P STYLE="font: 11pt/115% Times New Roman, Times, Serif; margin: 0; text-indent: 0.5in">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(1)&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;The
Report fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934.</P>

<P STYLE="font: 11pt/115% Times New Roman, Times, Serif; margin: 0">&nbsp;</P>

<P STYLE="font: 11pt/115% Times New Roman, Times, Serif; margin: 0; text-indent: 0.5in">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(2)&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;The
information contained in the Report fairly presents, in all material respects, the financial condition and results of operations
of the Company.</P>

<P STYLE="font: 11pt/115% Times New Roman, Times, Serif; margin: 0">&nbsp;</P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="width: 100%; font: 11pt Calibri, Helvetica, Sans-Serif; border-collapse: collapse">
<TR STYLE="vertical-align: top">
    <TD STYLE="width: 50%; padding-right: 5.4pt; padding-left: 5.4pt; line-height: 115%">&nbsp;</TD>
    <TD STYLE="width: 50%; padding-right: 5.4pt; padding-left: 5.4pt; line-height: 115%">&nbsp;</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt; line-height: 115%">&nbsp;</TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt; line-height: 115%">&nbsp;</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt; line-height: 115%"><FONT STYLE="font-family: Times New Roman, Times, Serif">/s/<U>Christopher E. Herald&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</U></FONT></TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt; line-height: 115%"><FONT STYLE="font-family: Times New Roman, Times, Serif">/s/<U>James R. Maronick&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</U></FONT></TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt; line-height: 115%"><FONT STYLE="font-family: Times New Roman, Times, Serif">Christopher E. Herald</FONT></TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt; line-height: 115%"><FONT STYLE="font-family: Times New Roman, Times, Serif">James R. Maronick</FONT></TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt; line-height: 115%"><FONT STYLE="font-family: Times New Roman, Times, Serif">Chief Executive Officer</FONT></TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt; line-height: 115%"><FONT STYLE="font-family: Times New Roman, Times, Serif">Chief Financial Officer</FONT></TD></TR>
</TABLE>
<P STYLE="font: 11pt/115% Times New Roman, Times, Serif; margin: 0">&nbsp;</P>

<P STYLE="font: 11pt/115% Times New Roman, Times, Serif; margin: 0">Dated: May 2, 2018</P>


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    <us-gaap:BusinessDescriptionAndAccountingPoliciesTextBlock contextRef="From2018-01-01to2018-03-31">&lt;p style="margin: 0pt"&gt;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0"&gt;&lt;b&gt;1.&amp;#160;&amp;#160;&amp;#160;&amp;#160;&amp;#160;&amp;#160;&amp;#160;Business&#13;and Significant Accounting Policies&lt;/b&gt;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0"&gt;&lt;i&gt;Business and company formation&lt;/i&gt;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0; text-indent: 0.5in"&gt;Solitario Zinc Corp. (&amp;#8220;Solitario,&amp;#8221;&#13;or the &amp;#8220;Company&amp;#8221;) is an exploration stage company as defined in Industry Guide 7, as issued by the United States Securities&#13;and Exchange Commission (&amp;#8220;SEC&amp;#8221;). Solitario was incorporated in the state of Colorado on November 15, 1984 as a wholly-owned&#13;subsidiary of Crown Resources Corporation (&amp;#34;Crown&amp;#34;). In July 1994, Solitario became a publicly traded company on the Toronto&#13;Stock Exchange (the &amp;#34;TSX&amp;#34;) through its initial public offering. Solitario has been actively involved in mineral exploration&#13;since 1993. Solitario&amp;#8217;s primary business is to acquire exploration mineral properties or royalties and/or discover economic&#13;deposits on its mineral properties and advance these deposits, either on its own or through joint ventures, up to the development&#13;stage. At that point, or sometime prior to that point, Solitario would likely attempt to sell its mineral properties, pursue their&#13;development either on its own, or through a joint venture with a partner that has expertise in mining operations, or create a royalty&#13;with a third party that continues to advance the property. As a result of the Acquisition (defined below), Solitario is now primarily&#13;focused on the acquisition and exploration of zinc-related exploration mineral properties. In addition to focusing on its mineral&#13;exploration properties and the evaluation of mineral properties for acquisition or purchase of royalty interests, Solitario also&#13;evaluates potential strategic transactions for the acquisition of new precious and base metal properties and assets with exploration&#13;potential or business combinations that Solitario determines to be favorable to Solitario.&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0; text-indent: 0.5in"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0; text-indent: 0.5in"&gt;Solitario has recorded revenue in&#13;the past from the sale of mineral property, including the sale in 2015 of its former interest in Mount Hamilton LLC (&amp;#8220;MH-LLC&amp;#8221;)&#13;the owner of its former Mt. Hamilton project (the &amp;#8220;Mt. Hamilton Transaction&amp;#8221;), and joint venture property payments&#13;and the sale of a royalty on its former Mt. Hamilton project. Revenues from the sale or joint venture of properties or assets,&#13;although significant when they occur, have not been a consistent annual source of revenue and would only occur in the future, if&#13;at all, on an infrequent basis.&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0; text-indent: 0.5in"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0; text-indent: 0.5in"&gt;Solitario currently considers its&#13;carried interest in the Florida Canyon project and its interest in the Lik project to be its core mineral property assets. Solitario&amp;#8217;s&#13;joint venture partner is expected to continue the development and furtherance of the Florida Canyon project and Solitario will&#13;monitor progress at Florida Canyon. Solitario is working with its 50% joint venture partner, Teck American Incorporated, a wholly-owned&#13;subsidiary of Teck Resources Limited ( both companies referred to as &amp;#8220;Teck&amp;#8221;), in the Lik deposit to further the exploration&#13;and evaluate potential development plans for the Lik project.&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0; text-indent: 0.5in"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0; text-indent: 0.5in"&gt;&lt;font style="color: windowtext"&gt;As&#13;of March 31, 2018, Solitario has significant balances of cash and short-term investments that Solitario anticipates using, in part,&#13;to further the development of the Florida Canyon and Lik projects and to potentially acquire additional mineral property assets.&#13;The&lt;/font&gt; fluctuations in precious metal and other commodity prices contribute to a challenging environment for mineral exploration&#13;and development, which has created opportunities as well as challenges for the potential acquisition of early-stage and advanced&#13;mineral exploration projects or other related assets at potentially attractive terms.&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0; text-indent: 0.5in"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0; text-indent: 0.5in"&gt;The accompanying interim condensed&#13;consolidated financial statements of Solitario for the three months ended March 31, 2018 are unaudited and are prepared in accordance&#13;with accounting principles generally accepted in the United States of America (&amp;#8220;generally accepted accounting principles&amp;#8221;).&#13;They do not include all disclosures required by generally accepted accounting principles for annual financial statements, but in&#13;the opinion of management, include all adjustments, consisting only of normal recurring items, necessary for a fair presentation.&#13;Interim results are not necessarily indicative of results, which may be achieved in the future or for the full year ending December&#13;31, 2018.&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0; text-indent: 0.5in"&gt;These financial statements should&#13;be read in conjunction with the financial statements and notes thereto which are included in Solitario&amp;#8217;s Annual Report on&#13;Form 10-K for the year ended December 31, 2017. The accounting policies set forth in those annual financial statements are the&#13;same as the accounting policies utilized in the preparation of these financial statements, except as modified for appropriate interim&#13;financial statement presentation.&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0; text-indent: 0.5in"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0; text-indent: 0.5in"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0"&gt;&lt;i&gt;Recent Developments&lt;/i&gt;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0"&gt;&lt;u&gt;Purchase of Zazu&lt;/u&gt;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0; text-indent: 0.5in"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0; text-indent: 0.5in"&gt;On July 12, 2017, Solitario completed&#13;the acquisition of Zazu Metals Corp. (&amp;#8220;Zazu&amp;#8221;) pursuant to a definitive arrangement agreement between Solitario and&#13;Zazu whereby Solitario agreed to acquire all of the issued and outstanding common shares of Zazu (the &amp;#34;Zazu Shares&amp;#34;) by&#13;way of a statutory plan of arrangement (the &amp;#34;Arrangement&amp;#34;) under the &lt;i&gt;Canada Business Corporations Act&lt;/i&gt; (the &amp;#8220;Acquisition&amp;#8221;).&#13;The Arrangement was approved by the Ontario (Canada) Superior Court of Justice on July 7, 2017. Per the Arrangement, Solitario&#13;issued 19,788,177 shares of its common stock on July 12, 2017 in exchange for all of the issued and outstanding Zazu Shares, which&#13;represented 0.3572 shares of Solitario common stock for each outstanding Zazu Share. Zazu had one primary asset, its interest in&#13;the Lik project, and the Acquisition was treated as an asset purchase in accordance with ASU 2017-01 &amp;#8220;Business Combinations.&amp;#8221;&#13;Solitario granted stock options to acquire an aggregate of 1,782,428 shares of Solitario common stock to Zazu option holders the&#13;(&amp;#8220;Replacement Options&amp;#8221;) in connection with the Acquisition. The total purchase price of $16,110,000 was recorded during&#13;the year ended December 31, 2017.&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0"&gt;&lt;i&gt;Financial reporting&lt;/i&gt;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0; text-indent: 0.5in"&gt;The consolidated financial statements&#13;include the accounts of Solitario and its wholly-owned subsidiaries. All significant intercompany accounts and transactions have&#13;been eliminated in consolidation. The consolidated financial statements are prepared in accordance with accounting principles generally&#13;accepted in the United States of America (&amp;#34;generally accepted accounting principles&amp;#34;) and are expressed in U.S. dollars.&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0"&gt;&lt;i&gt;Revenue recognition&lt;/i&gt;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0; text-indent: 0.5in"&gt;Solitario records delay rental payments&#13;as revenue in the period received. Any payments received for the sale of property interests are recorded as a reduction of the&#13;related property's capitalized cost. Proceeds which exceed the capitalized cost of the property without reserves are recognized&#13;as revenue. Payments received on the sale of properties with reserves are recognized as revenue to the extent the proceeds exceed&#13;the proportionate basis in the assets sold. There were no delay rentals in the periods presented.&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0"&gt;&lt;i&gt;Use of estimates&lt;/i&gt;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0; text-indent: 0.5in"&gt;The preparation of financial statements&#13;in conformity with generally accepted accounting principles requires management to make estimates and assumptions that affect the&#13;reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements&#13;and the reported amounts of revenues and expenses during the reporting period. Actual results could differ from those estimates.&#13;Some of the more significant estimates included in the preparation of Solitario's financial statements pertain to: (i) Solitario&amp;#8217;s&#13;carrying value of short-term investments; (ii) the recoverability of mineral properties related to its mineral exploration properties&#13;and their future exploration potential; (iii) the fair value of stock option grants to employees, to officers and directors and&#13;to others; (iv) the ability of Solitario to realize its deferred tax assets; and (v) Solitario's investment in marketable equity&#13;securities.&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0; text-indent: 0.5in"&gt;In performing its activities, Solitario&#13;has incurred certain costs for mineral properties. The recovery of these costs is ultimately dependent upon the sale of mineral&#13;property interests or the development of economically recoverable ore reserves and the ability of Solitario to obtain the necessary&#13;permits and financing to successfully place the properties into production, and upon future profitable operations, none of which&#13;is assured.&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0"&gt;&lt;i&gt;Cash equivalents &lt;/i&gt;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0; text-indent: 0.5in"&gt;Cash equivalents include investments&#13;in highly liquid money-market securities with original maturities of three months or less when purchased. As of March 31, 2018,&#13;a portion of Solitario&amp;#8217;s cash and cash equivalents are held in brokerage accounts and foreign banks, which are not covered&#13;under the Federal Deposit Insurance Corporation (&amp;#8220;FDIC&amp;#8221;) rules for the United States. At March 31, 2018, Solitario&#13;holds short-term investments in United States Treasury securities (&amp;#8220;USTS&amp;#8221;) of $9,976,000.&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0"&gt;&lt;i&gt;Short-term investments&lt;/i&gt;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0"&gt;&lt;i&gt;&amp;#160;&lt;/i&gt;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0; text-indent: 0.5in"&gt;As of March 31, 2018, Solitario has&#13;$9,976,000 of its current assets in USTS with maturities of 15 days to 21 months. The USTS are recorded at their fair value, based&#13;upon quoted market prices. As of March 31, 2018, we have $1,247,000 in separate bank certificates of deposit (&amp;#8220;CDs&amp;#8221;)&#13;each with a maximum value of $250,000, and each of which are covered by FDIC insurance to the full-face value of the CDs. At March&#13;31, 2018, the CDs have maturities of between 4 and 15 months. Solitario&amp;#8217;s short-term investments are recorded at their fair&#13;value, based upon quoted market prices. The short-term investments are highly liquid and may be sold in their entirety at any time&#13;at their quoted market price and are classified as a current asset.&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0"&gt;&lt;i&gt;&amp;#160;&lt;/i&gt;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0"&gt;&lt;i&gt;Mineral properties &lt;/i&gt;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0; text-indent: 0.5in"&gt;&amp;#160;&amp;#160;&amp;#160;&amp;#160;&amp;#160;&amp;#160;&amp;#160;&amp;#160;&amp;#160;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0; text-indent: 0.5in"&gt;Solitario expenses all exploration&#13;costs incurred on its mineral properties prior to the establishment of proven and probable reserves through the completion of a&#13;feasibility study. Initial acquisition costs of Solitario&amp;#8217;s mineral properties are capitalized. Solitario capitalizes all&#13;of its development expenditures on its projects, subsequent to the completion of a feasibility study. Solitario regularly performs&#13;evaluations of its investment in mineral properties to assess the recoverability and/or the residual value of its investments in&#13;these assets. All long-lived assets are reviewed for impairment whenever events or circumstances change which indicate the carrying&#13;amount of an asset may not be recoverable, utilizing established guidelines based upon undiscounted future net cash flows from&#13;the asset or upon the determination that certain exploration properties do not have sufficient potential for economic mineralization.&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0"&gt;&lt;i&gt;Derivative instruments&lt;/i&gt;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0"&gt;&lt;i&gt;&amp;#160;&lt;/i&gt;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0; text-align: left; text-indent: 0.5in"&gt;Solitario accounts&#13;for its derivative instruments in accordance with ASC 815, &amp;#34;Accounting for Derivative Instruments and Hedging Activities&amp;#34;&#13;(&amp;#8220;ASC 815&amp;#8221;). Solitario has entered into covered calls from time to time on its investment in Kinross Gold Corporation&#13;(&amp;#8220;Kinross&amp;#8221;) marketable equity securities. In addition, during 2017 and 2016, Solitario owned warrants exercisable to&#13;acquire shares of Vendetta Mining Corp. (&amp;#8220;Vendetta&amp;#8221;) common stock (the &amp;#8220;Vendetta Warrants&amp;#8221;). Each Vendetta&#13;warrant allowed Solitario to purchase one share of Vendetta common stock at a price of Cdn$0.10 per share for a period of two years.&#13;Solitario has not designated its covered calls as hedging instruments and any changes in the fair value of the covered calls and&#13;its Vendetta Warrants are recognized in the statement of operations in the period of the change as gain or loss on derivative instruments.&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0"&gt;&lt;i&gt;Fair value&lt;/i&gt;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0; text-indent: 0.5in"&gt;FASB ASC 820, &amp;#8220;Fair Value Measurements&#13;and Disclosures&amp;#8221; (&amp;#8220;ASC 820&amp;#8221;), establishes a framework for measuring fair value and requires enhanced disclosures&#13;about fair value measurements. ASC 820 clarifies that fair value is an exit price, representing the amount that would be received&#13;to sell an asset or paid to transfer a liability in an orderly transaction between market participants. For certain of Solitario's&#13;financial instruments, including cash and cash equivalents and accounts payable, the carrying amounts approximate fair value due&#13;to their short-term maturities. Solitario's short-term investments in USTS and CDs, its marketable equity securities and any covered&#13;call options against those marketable equity securities are carried at their estimated fair value based on quoted market prices.&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0"&gt;&lt;i&gt;Marketable equity securities&lt;/i&gt;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0; text-indent: 0.5in"&gt;Solitario's investments in marketable&#13;equity securities are classified as available-for-sale and are carried at fair value, which is based upon quoted prices of the&#13;securities owned. Solitario records investments in marketable equity securities as available-for-sale for investments in publicly&#13;traded marketable equity securities for which it does not exercise significant control and where Solitario has no representation&#13;on the board of directors of those companies and exercises no control over the management of those companies. The cost of marketable&#13;equity securities sold is determined by the specific identification method. During the first three months of 2018 Solitario adopted&#13;ASU 2016-01, &amp;#8220;Financial Instruments &amp;#8211; Recognition and Measurement of Financial Assets and Financial Liabilities (Topic&#13;825)&amp;#8221; (&amp;#8220;ASU 2016-01&amp;#8221;). In accordance with ASU 2016-01, changes in fair value are recorded in the consolidated&#13;statement of operations during the period of the change. During the first three months of 2018 Solitario recorded a cumulative-effect&#13;adjustment to the balance sheet as of the beginning of the fiscal year of adoption of ASU 2016-01. See Note 9, &amp;#8220;Shareholders&amp;#8217;&#13;Equity and Other Comprehensive Income&amp;#8221;, below. &amp;#9;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0"&gt;&lt;i&gt;&amp;#160;&lt;/i&gt;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0"&gt;&lt;i&gt;Foreign exchange&lt;/i&gt;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0; text-indent: 0.5in"&gt;The United States dollar is the functional&#13;currency for all of Solitario's foreign subsidiaries. Although Solitario's South American exploration activities during 2017 and&#13;the first quarter of 2018 have been conducted primarily in Peru, a portion of the payments under the land, leasehold and exploration&#13;agreements of Solitario are denominated in United States dollars. Realized foreign currency gains and losses are included in the&#13;results of operations in the period in which they occur.&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0"&gt;&lt;i&gt;Income taxes&lt;/i&gt;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0; text-indent: 0.5in"&gt;Solitario accounts for income taxes&#13;in accordance with ASC 740, &amp;#8220;Accounting for Income Taxes&amp;#8221; (&amp;#8220;ASC 740&amp;#8221;). Under ASC 740, income taxes are&#13;provided for the tax effects of transactions reported in the financial statements and consist of taxes currently due plus deferred&#13;taxes related to certain income and expenses recognized in different periods for financial and income tax reporting purposes. Deferred&#13;tax assets and liabilities represent the future tax return consequences of those differences, which will either be taxable or deductible&#13;when the assets and liabilities are recovered or settled. Deferred taxes are also recognized for operating losses and tax credits&#13;that are available to offset future taxable income and income taxes, respectively. A valuation allowance is provided if it is more&#13;likely than not that some portion or all of the deferred tax assets will not be realized.&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0"&gt;&lt;i&gt;Accounting for uncertainty in income taxes&lt;/i&gt;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0; text-indent: 0.5in"&gt;ASC 740 clarifies the accounting&#13;for uncertainty in income taxes recognized in a company's financial statements. ASC 740 prescribes a recognition threshold and&#13;measurement attribute for the financial statement recognition and measurement of a tax position taken or expected to be taken in&#13;a tax return. ASC 740 also provides guidance on derecognition, classification, interest and penalties, accounting in interim periods,&#13;disclosure, and transition. ASC 740 provides that a company's tax position will be considered settled if the taxing authority has&#13;completed its examination, the company does not plan to appeal, and it is remote that the taxing authority would reexamine the&#13;tax position in the future. The provisions of ASC 740 had no effect on Solitario's financial position or results of operations.&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0"&gt;&lt;i&gt;Earnings per share&lt;/i&gt;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0; text-indent: 0.5in"&gt;The calculation of basic and&#13;diluted earnings (loss) per share is based on the weighted average number of shares of common stock outstanding during the&#13;three months ended March 31, 2018 and 2017. Potentially dilutive shares related to outstanding common stock options of&#13;2,082,428 Solitario common shares for the three months ended March 31, 2018 were excluded from the calculation of diluted&#13;earnings (loss) per share because the effects were anti-dilutive. There were no similar potentially dilutive securities&#13;outstanding during the three months ended March 31, 2017.&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0.5in; text-indent: -0.5in"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0"&gt;&lt;i&gt;Employee stock compensation and incentive plans&lt;/i&gt;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0; text-indent: 0.5in"&gt;Solitario classifies all of its stock&#13;options as equity options in accordance with the provisions of ASC 718, &amp;#8220;Compensation &amp;#8211; Stock Compensation.&amp;#8221;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0"&gt;&lt;i&gt;Recent accounting pronouncements&lt;/i&gt;&lt;/p&gt;&#13;&#13;&lt;p style="font: 12pt Times New Roman, Times, Serif; margin-right: 30.6pt; margin-left: 0"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0; text-indent: 0.5in"&gt;In February 2016, the FASB issued&#13;ASU 2016-02, &amp;#8220;Leases&amp;#8221; (&amp;#8220;ASU No. 2016-02&amp;#8221;), which will require lessees to recognize a right-of-use asset&#13;and a lease liability for all leases that are not short-term in nature. For a lessor, the accounting applied is also largely unchanged&#13;from previous guidance. The new rules will be effective for Solitario in the first quarter of 2019. Solitario does not anticipate&#13;early adoption. Solitario does not expect the adoption of ASU No. 2016-02 to materially change its current accounting methods and&#13;therefore it does not expect the adoption to have a material impact on its consolidated financial position or results of operations.&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0; text-indent: 0.5in"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0; text-indent: 0.5in"&gt;In January 2016 the FASB issued ASU&#13;No 2016-01&lt;i&gt;.&lt;/i&gt; ASU No. 2016-01 revises the classification and measurement of investment in certain equity investments and the&#13;presentation of certain fair value changes for certain financial liabilities measured at fair value. ASU No. 2016-01 requires the&#13;change in fair value of many equity investments to be recognized in net income. ASU No. 2016-01 is effective for interim and annual&#13;periods beginning after December 15, 2017, with early adoption permitted. Solitario adopted ASU No. 2016-01 in the first quarter&#13;of 2018. Solitario recorded a cumulative-effect adjustment for the change in accounting principle to retained earnings of $576,000&#13;related to the adoption of ASU 2016-01. See Note 9, &amp;#8220;Shareholders&amp;#8217; Equity and Accumulated Other Comprehensive Income,&amp;#8221;&#13;below.&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0.5in; text-indent: -0.5in"&gt;&lt;b&gt;&amp;#160;&lt;/b&gt;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0; text-indent: 0.5in"&gt;In February 2018, the FASB issued&#13;ASU No. 2018-02, &amp;#8220;Reclassification of Certain Tax Effects from Accumulated Other Comprehensive Income&amp;#8221; (ASU 2018-02),&#13;which allows for a reclassification from accumulated other comprehensive income or loss to retained earnings or accumulated deficit&#13;for stranded tax effects resulting from the Tax Cuts and Jobs Act of 2017 (&amp;#8220;TCJA&amp;#8221;). ASU 2018-02 also requires certain&#13;related disclosures. ASU 2018-02 is effective for annual periods, and interim periods within those annual periods, beginning after&#13;December 15, 2018 and should be applied either in the period of adoption or retrospectively to each period in which the effect&#13;of the change in the U.S. federal corporate income tax rate in the TCJA is recognized. Early adoption is permitted. Solitario is&#13;currently evaluating the impact of ASU 2018-02&amp;#160;but&amp;#160;does not believe it will have a material effect on Solitario&amp;#8217;s&#13;financial position or results of operations.&lt;/p&gt;&#13;&#13;&#13;&#13;&lt;p style="margin: 0pt"&gt;&lt;/p&gt;</us-gaap:BusinessDescriptionAndAccountingPoliciesTextBlock>
    <us-gaap:OrganizationConsolidationBasisOfPresentationBusinessDescriptionAndAccountingPoliciesTextBlock contextRef="From2018-01-01to2018-03-31">&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0"&gt;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0"&gt;&lt;b&gt;1.&amp;#160;&amp;#160;&amp;#160;&amp;#160;&amp;#160;&amp;#160;&amp;#160;Business&#13;and Significant Accounting Policies&lt;/b&gt;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0"&gt;&lt;i&gt;Business and company formation&lt;/i&gt;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0; text-indent: 0.5in"&gt;Solitario Zinc Corp. (&amp;#8220;Solitario,&amp;#8221;&#13;or the &amp;#8220;Company&amp;#8221;) is an exploration stage company as defined in Industry Guide 7, as issued by the United States Securities&#13;and Exchange Commission (&amp;#8220;SEC&amp;#8221;). Solitario was incorporated in the state of Colorado on November 15, 1984 as a wholly-owned&#13;subsidiary of Crown Resources Corporation (&amp;#34;Crown&amp;#34;). In July 1994, Solitario became a publicly traded company on the Toronto&#13;Stock Exchange (the &amp;#34;TSX&amp;#34;) through its initial public offering. Solitario has been actively involved in mineral exploration&#13;since 1993. Solitario&amp;#8217;s primary business is to acquire exploration mineral properties or royalties and/or discover economic&#13;deposits on its mineral properties and advance these deposits, either on its own or through joint ventures, up to the development&#13;stage. At that point, or sometime prior to that point, Solitario would likely attempt to sell its mineral properties, pursue their&#13;development either on its own, or through a joint venture with a partner that has expertise in mining operations, or create a royalty&#13;with a third party that continues to advance the property. As a result of the Acquisition (defined below), Solitario is now primarily&#13;focused on the acquisition and exploration of zinc-related exploration mineral properties. In addition to focusing on its mineral&#13;exploration properties and the evaluation of mineral properties for acquisition or purchase of royalty interests, Solitario also&#13;evaluates potential strategic transactions for the acquisition of new precious and base metal properties and assets with exploration&#13;potential or business combinations that Solitario determines to be favorable to Solitario.&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0; text-indent: 0.5in"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0; text-indent: 0.5in"&gt;Solitario has recorded revenue in&#13;the past from the sale of mineral property, including the sale in 2015 of its former interest in Mount Hamilton LLC (&amp;#8220;MH-LLC&amp;#8221;)&#13;the owner of its former Mt. Hamilton project (the &amp;#8220;Mt. Hamilton Transaction&amp;#8221;), and joint venture property payments&#13;and the sale of a royalty on its former Mt. Hamilton project. Revenues from the sale or joint venture of properties or assets,&#13;although significant when they occur, have not been a consistent annual source of revenue and would only occur in the future, if&#13;at all, on an infrequent basis.&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0; text-indent: 0.5in"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0; text-indent: 0.5in"&gt;Solitario currently considers its&#13;carried interest in the Florida Canyon project and its interest in the Lik project to be its core mineral property assets. Solitario&amp;#8217;s&#13;joint venture partner is expected to continue the development and furtherance of the Florida Canyon project and Solitario will&#13;monitor progress at Florida Canyon. Solitario is working with its 50% joint venture partner, Teck American Incorporated, a wholly-owned&#13;subsidiary of Teck Resources Limited ( both companies referred to as &amp;#8220;Teck&amp;#8221;), in the Lik deposit to further the exploration&#13;and evaluate potential development plans for the Lik project.&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0; text-indent: 0.5in"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0; text-indent: 0.5in"&gt;&lt;font style="color: windowtext"&gt;As&#13;of March 31, 2018, Solitario has significant balances of cash and short-term investments that Solitario anticipates using, in part,&#13;to further the development of the Florida Canyon and Lik projects and to potentially acquire additional mineral property assets.&#13;The&lt;/font&gt; fluctuations in precious metal and other commodity prices contribute to a challenging environment for mineral exploration&#13;and development, which has created opportunities as well as challenges for the potential acquisition of early-stage and advanced&#13;mineral exploration projects or other related assets at potentially attractive terms.&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0; text-indent: 0.5in"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0; text-indent: 0.5in"&gt;The accompanying interim condensed&#13;consolidated financial statements of Solitario for the three months ended March 31, 2018 are unaudited and are prepared in accordance&#13;with accounting principles generally accepted in the United States of America (&amp;#8220;generally accepted accounting principles&amp;#8221;).&#13;They do not include all disclosures required by generally accepted accounting principles for annual financial statements, but in&#13;the opinion of management, include all adjustments, consisting only of normal recurring items, necessary for a fair presentation.&#13;Interim results are not necessarily indicative of results, which may be achieved in the future or for the full year ending December&#13;31, 2018.&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0; text-indent: 0.5in"&gt;These financial statements should&#13;be read in conjunction with the financial statements and notes thereto which are included in Solitario&amp;#8217;s Annual Report on&#13;Form 10-K for the year ended December 31, 2017. The accounting policies set forth in those annual financial statements are the&#13;same as the accounting policies utilized in the preparation of these financial statements, except as modified for appropriate interim&#13;financial statement presentation.&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0; text-indent: 0.5in"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0; text-indent: 0.5in"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0"&gt;&lt;i&gt;Recent Developments&lt;/i&gt;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0"&gt;&lt;u&gt;Purchase of Zazu&lt;/u&gt;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0; text-indent: 0.5in"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0; text-indent: 0.5in"&gt;On July 12, 2017, Solitario completed&#13;the acquisition of Zazu Metals Corp. (&amp;#8220;Zazu&amp;#8221;) pursuant to a definitive arrangement agreement between Solitario and&#13;Zazu whereby Solitario agreed to acquire all of the issued and outstanding common shares of Zazu (the &amp;#34;Zazu Shares&amp;#34;) by&#13;way of a statutory plan of arrangement (the &amp;#34;Arrangement&amp;#34;) under the &lt;i&gt;Canada Business Corporations Act&lt;/i&gt; (the &amp;#8220;Acquisition&amp;#8221;).&#13;The Arrangement was approved by the Ontario (Canada) Superior Court of Justice on July 7, 2017. Per the Arrangement, Solitario&#13;issued 19,788,177 shares of its common stock on July 12, 2017 in exchange for all of the issued and outstanding Zazu Shares, which&#13;represented 0.3572 shares of Solitario common stock for each outstanding Zazu Share. Zazu had one primary asset, its interest in&#13;the Lik project, and the Acquisition was treated as an asset purchase in accordance with ASU 2017-01 &amp;#8220;Business Combinations.&amp;#8221;&#13;Solitario granted stock options to acquire an aggregate of 1,782,428 shares of Solitario common stock to Zazu option holders the&#13;(&amp;#8220;Replacement Options&amp;#8221;) in connection with the Acquisition. The total purchase price of $16,110,000 was recorded during&#13;the year ended December 31, 2017.&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0"&gt;&lt;i&gt;Financial reporting&lt;/i&gt;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0; text-indent: 0.5in"&gt;The consolidated financial statements&#13;include the accounts of Solitario and its wholly-owned subsidiaries. All significant intercompany accounts and transactions have&#13;been eliminated in consolidation. The consolidated financial statements are prepared in accordance with accounting principles generally&#13;accepted in the United States of America (&amp;#34;generally accepted accounting principles&amp;#34;) and are expressed in U.S. dollars.&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0"&gt;&lt;i&gt;Revenue recognition&lt;/i&gt;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0; text-indent: 0.5in"&gt;Solitario records delay rental payments&#13;as revenue in the period received. Any payments received for the sale of property interests are recorded as a reduction of the&#13;related property's capitalized cost. Proceeds which exceed the capitalized cost of the property without reserves are recognized&#13;as revenue. Payments received on the sale of properties with reserves are recognized as revenue to the extent the proceeds exceed&#13;the proportionate basis in the assets sold. There were no delay rentals in the periods presented.&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0"&gt;&lt;i&gt;Use of estimates&lt;/i&gt;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0; text-indent: 0.5in"&gt;The preparation of financial statements&#13;in conformity with generally accepted accounting principles requires management to make estimates and assumptions that affect the&#13;reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements&#13;and the reported amounts of revenues and expenses during the reporting period. Actual results could differ from those estimates.&#13;Some of the more significant estimates included in the preparation of Solitario's financial statements pertain to: (i) Solitario&amp;#8217;s&#13;carrying value of short-term investments; (ii) the recoverability of mineral properties related to its mineral exploration properties&#13;and their future exploration potential; (iii) the fair value of stock option grants to employees, to officers and directors and&#13;to others; (iv) the ability of Solitario to realize its deferred tax assets; and (v) Solitario's investment in marketable equity&#13;securities.&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0; text-indent: 0.5in"&gt;In performing its activities, Solitario&#13;has incurred certain costs for mineral properties. The recovery of these costs is ultimately dependent upon the sale of mineral&#13;property interests or the development of economically recoverable ore reserves and the ability of Solitario to obtain the necessary&#13;permits and financing to successfully place the properties into production, and upon future profitable operations, none of which&#13;is assured.&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0"&gt;&lt;i&gt;Cash equivalents &lt;/i&gt;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0; text-indent: 0.5in"&gt;Cash equivalents include investments&#13;in highly liquid money-market securities with original maturities of three months or less when purchased. As of March 31, 2018,&#13;a portion of Solitario&amp;#8217;s cash and cash equivalents are held in brokerage accounts and foreign banks, which are not covered&#13;under the Federal Deposit Insurance Corporation (&amp;#8220;FDIC&amp;#8221;) rules for the United States. At March 31, 2018, Solitario&#13;holds short-term investments in United States Treasury securities (&amp;#8220;USTS&amp;#8221;) of $9,976,000.&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0"&gt;&lt;i&gt;Short-term investments&lt;/i&gt;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0"&gt;&lt;i&gt;&amp;#160;&lt;/i&gt;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0; text-indent: 0.5in"&gt;As of March 31, 2018, Solitario has&#13;$9,976,000 of its current assets in USTS with maturities of 15 days to 21 months. The USTS are recorded at their fair value, based&#13;upon quoted market prices. As of March 31, 2018, we have $1,247,000 in separate bank certificates of deposit (&amp;#8220;CDs&amp;#8221;)&#13;each with a maximum value of $250,000, and each of which are covered by FDIC insurance to the full-face value of the CDs. At March&#13;31, 2018, the CDs have maturities of between 4 and 15 months. Solitario&amp;#8217;s short-term investments are recorded at their fair&#13;value, based upon quoted market prices. The short-term investments are highly liquid and may be sold in their entirety at any time&#13;at their quoted market price and are classified as a current asset.&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0"&gt;&lt;i&gt;&amp;#160;&lt;/i&gt;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0"&gt;&lt;i&gt;Mineral properties &lt;/i&gt;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0; text-indent: 0.5in"&gt;&amp;#160;&amp;#160;&amp;#160;&amp;#160;&amp;#160;&amp;#160;&amp;#160;&amp;#160;&amp;#160;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0; text-indent: 0.5in"&gt;Solitario expenses all exploration&#13;costs incurred on its mineral properties prior to the establishment of proven and probable reserves through the completion of a&#13;feasibility study. Initial acquisition costs of Solitario&amp;#8217;s mineral properties are capitalized. Solitario capitalizes all&#13;of its development expenditures on its projects, subsequent to the completion of a feasibility study. Solitario regularly performs&#13;evaluations of its investment in mineral properties to assess the recoverability and/or the residual value of its investments in&#13;these assets. All long-lived assets are reviewed for impairment whenever events or circumstances change which indicate the carrying&#13;amount of an asset may not be recoverable, utilizing established guidelines based upon undiscounted future net cash flows from&#13;the asset or upon the determination that certain exploration properties do not have sufficient potential for economic mineralization.&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0"&gt;&lt;i&gt;Derivative instruments&lt;/i&gt;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0"&gt;&lt;i&gt;&amp;#160;&lt;/i&gt;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0; text-align: left; text-indent: 0.5in"&gt;Solitario accounts&#13;for its derivative instruments in accordance with ASC 815, &amp;#34;Accounting for Derivative Instruments and Hedging Activities&amp;#34;&#13;(&amp;#8220;ASC 815&amp;#8221;). Solitario has entered into covered calls from time to time on its investment in Kinross Gold Corporation&#13;(&amp;#8220;Kinross&amp;#8221;) marketable equity securities. In addition, during 2017 and 2016, Solitario owned warrants exercisable to&#13;acquire shares of Vendetta Mining Corp. (&amp;#8220;Vendetta&amp;#8221;) common stock (the &amp;#8220;Vendetta Warrants&amp;#8221;). Each Vendetta&#13;warrant allowed Solitario to purchase one share of Vendetta common stock at a price of Cdn$0.10 per share for a period of two years.&#13;Solitario has not designated its covered calls as hedging instruments and any changes in the fair value of the covered calls and&#13;its Vendetta Warrants are recognized in the statement of operations in the period of the change as gain or loss on derivative instruments.&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0"&gt;&lt;i&gt;Fair value&lt;/i&gt;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0; text-indent: 0.5in"&gt;FASB ASC 820, &amp;#8220;Fair Value Measurements&#13;and Disclosures&amp;#8221; (&amp;#8220;ASC 820&amp;#8221;), establishes a framework for measuring fair value and requires enhanced disclosures&#13;about fair value measurements. ASC 820 clarifies that fair value is an exit price, representing the amount that would be received&#13;to sell an asset or paid to transfer a liability in an orderly transaction between market participants. For certain of Solitario's&#13;financial instruments, including cash and cash equivalents and accounts payable, the carrying amounts approximate fair value due&#13;to their short-term maturities. Solitario's short-term investments in USTS and CDs, its marketable equity securities and any covered&#13;call options against those marketable equity securities are carried at their estimated fair value based on quoted market prices.&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0"&gt;&lt;i&gt;Marketable equity securities&lt;/i&gt;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0; text-indent: 0.5in"&gt;Solitario's investments in marketable&#13;equity securities are classified as available-for-sale and are carried at fair value, which is based upon quoted prices of the&#13;securities owned. Solitario records investments in marketable equity securities as available-for-sale for investments in publicly&#13;traded marketable equity securities for which it does not exercise significant control and where Solitario has no representation&#13;on the board of directors of those companies and exercises no control over the management of those companies. The cost of marketable&#13;equity securities sold is determined by the specific identification method. During the first three months of 2018 Solitario adopted&#13;ASU 2016-01, &amp;#8220;Financial Instruments &amp;#8211; Recognition and Measurement of Financial Assets and Financial Liabilities (Topic&#13;825)&amp;#8221; (&amp;#8220;ASU 2016-01&amp;#8221;). In accordance with ASU 2016-01, changes in fair value are recorded in the consolidated&#13;statement of operations during the period of the change. During the first three months of 2018 Solitario recorded a cumulative-effect&#13;adjustment to the balance sheet as of the beginning of the fiscal year of adoption of ASU 2016-01. See Note 9, &amp;#8220;Shareholders&amp;#8217;&#13;Equity and Other Comprehensive Income&amp;#8221;, below. &amp;#9;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0"&gt;&lt;i&gt;&amp;#160;&lt;/i&gt;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0"&gt;&lt;i&gt;Foreign exchange&lt;/i&gt;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0; text-indent: 0.5in"&gt;The United States dollar is the functional&#13;currency for all of Solitario's foreign subsidiaries. Although Solitario's South American exploration activities during 2017 and&#13;the first quarter of 2018 have been conducted primarily in Peru, a portion of the payments under the land, leasehold and exploration&#13;agreements of Solitario are denominated in United States dollars. Realized foreign currency gains and losses are included in the&#13;results of operations in the period in which they occur.&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0"&gt;&lt;i&gt;Income taxes&lt;/i&gt;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0; text-indent: 0.5in"&gt;Solitario accounts for income taxes&#13;in accordance with ASC 740, &amp;#8220;Accounting for Income Taxes&amp;#8221; (&amp;#8220;ASC 740&amp;#8221;). Under ASC 740, income taxes are&#13;provided for the tax effects of transactions reported in the financial statements and consist of taxes currently due plus deferred&#13;taxes related to certain income and expenses recognized in different periods for financial and income tax reporting purposes. Deferred&#13;tax assets and liabilities represent the future tax return consequences of those differences, which will either be taxable or deductible&#13;when the assets and liabilities are recovered or settled. Deferred taxes are also recognized for operating losses and tax credits&#13;that are available to offset future taxable income and income taxes, respectively. A valuation allowance is provided if it is more&#13;likely than not that some portion or all of the deferred tax assets will not be realized.&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0"&gt;&lt;i&gt;Accounting for uncertainty in income taxes&lt;/i&gt;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0; text-indent: 0.5in"&gt;ASC 740 clarifies the accounting&#13;for uncertainty in income taxes recognized in a company's financial statements. ASC 740 prescribes a recognition threshold and&#13;measurement attribute for the financial statement recognition and measurement of a tax position taken or expected to be taken in&#13;a tax return. ASC 740 also provides guidance on derecognition, classification, interest and penalties, accounting in interim periods,&#13;disclosure, and transition. ASC 740 provides that a company's tax position will be considered settled if the taxing authority has&#13;completed its examination, the company does not plan to appeal, and it is remote that the taxing authority would reexamine the&#13;tax position in the future. The provisions of ASC 740 had no effect on Solitario's financial position or results of operations.&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0"&gt;&lt;i&gt;Earnings per share&lt;/i&gt;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0; text-indent: 0.5in"&gt;The calculation of basic and&#13;diluted earnings (loss) per share is based on the weighted average number of shares of common stock outstanding during the&#13;three months ended March 31, 2018 and 2017. Potentially dilutive shares related to outstanding common stock options of&#13;2,082,428 Solitario common shares for the three months ended March 31, 2018 were excluded from the calculation of diluted&#13;earnings (loss) per share because the effects were anti-dilutive. There were no similar potentially dilutive securities&#13;outstanding during the three months ended March 31, 2017.&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0.5in; text-indent: -0.5in"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0"&gt;&lt;i&gt;Employee stock compensation and incentive plans&lt;/i&gt;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0; text-indent: 0.5in"&gt;Solitario classifies all of its stock&#13;options as equity options in accordance with the provisions of ASC 718, &amp;#8220;Compensation &amp;#8211; Stock Compensation.&amp;#8221;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0"&gt;&lt;i&gt;Recent accounting pronouncements&lt;/i&gt;&lt;/p&gt;&#13;&#13;&lt;p style="font: 12pt Times New Roman, Times, Serif; margin-right: 30.6pt; margin-left: 0"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0; text-indent: 0.5in"&gt;In February 2016, the FASB issued&#13;ASU 2016-02, &amp;#8220;Leases&amp;#8221; (&amp;#8220;ASU No. 2016-02&amp;#8221;), which will require lessees to recognize a right-of-use asset&#13;and a lease liability for all leases that are not short-term in nature. For a lessor, the accounting applied is also largely unchanged&#13;from previous guidance. The new rules will be effective for Solitario in the first quarter of 2019. Solitario does not anticipate&#13;early adoption. Solitario does not expect the adoption of ASU No. 2016-02 to materially change its current accounting methods and&#13;therefore it does not expect the adoption to have a material impact on its consolidated financial position or results of operations.&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0; text-indent: 0.5in"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0; text-indent: 0.5in"&gt;In January 2016 the FASB issued ASU&#13;No 2016-01&lt;i&gt;.&lt;/i&gt; ASU No. 2016-01 revises the classification and measurement of investment in certain equity investments and the&#13;presentation of certain fair value changes for certain financial liabilities measured at fair value. ASU No. 2016-01 requires the&#13;change in fair value of many equity investments to be recognized in net income. ASU No. 2016-01 is effective for interim and annual&#13;periods beginning after December 15, 2017, with early adoption permitted. Solitario adopted ASU No. 2016-01 in the first quarter&#13;of 2018. Solitario recorded a cumulative-effect adjustment for the change in accounting principle to retained earnings of $576,000&#13;related to the adoption of ASU 2016-01. See Note 9, &amp;#8220;Shareholders&amp;#8217; Equity and Accumulated Other Comprehensive Income,&amp;#8221;&#13;below.&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0.5in; text-indent: -0.5in"&gt;&lt;b&gt;&amp;#160;&lt;/b&gt;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0; text-indent: 0.5in"&gt;In February 2018, the FASB issued&#13;ASU No. 2018-02, &amp;#8220;Reclassification of Certain Tax Effects from Accumulated Other Comprehensive Income&amp;#8221; (ASU 2018-02),&#13;which allows for a reclassification from accumulated other comprehensive income or loss to retained earnings or accumulated deficit&#13;for stranded tax effects resulting from the Tax Cuts and Jobs Act of 2017 (&amp;#8220;TCJA&amp;#8221;). ASU 2018-02 also requires certain&#13;related disclosures. ASU 2018-02 is effective for annual periods, and interim periods within those annual periods, beginning after&#13;December 15, 2018 and should be applied either in the period of adoption or retrospectively to each period in which the effect&#13;of the change in the U.S. federal corporate income tax rate in the TCJA is recognized. Early adoption is permitted. Solitario is&#13;currently evaluating the impact of ASU 2018-02&amp;#160;but&amp;#160;does not believe it will have a material effect on Solitario&amp;#8217;s&#13;financial position or results of operations.&lt;/p&gt;&#13;&#13;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0"&gt;&lt;/p&gt;</us-gaap:OrganizationConsolidationBasisOfPresentationBusinessDescriptionAndAccountingPoliciesTextBlock>
    <us-gaap:CertificatesOfDepositAtCarryingValue contextRef="AsOf2018-03-31" unitRef="USD" decimals="-3">1247000</us-gaap:CertificatesOfDepositAtCarryingValue>
    <us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount contextRef="From2018-01-01to2018-03-31" unitRef="Shares" decimals="INF">2082428</us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount>
    <XPL:CommonStockIssuedForPurchaseOfAssets contextRef="AsOf2017-07-12" unitRef="Shares" decimals="INF">19788177</XPL:CommonStockIssuedForPurchaseOfAssets>
    <XPL:ReplacementStockOptionsGranted contextRef="AsOf2017-07-12" unitRef="Shares" decimals="INF">1782428</XPL:ReplacementStockOptionsGranted>
    <us-gaap:USGovernmentSecuritiesAtCarryingValue contextRef="AsOf2018-03-31" unitRef="USD" decimals="-3">9976000</us-gaap:USGovernmentSecuritiesAtCarryingValue>
    <us-gaap:AcquisitionCosts contextRef="From2017-01-01to2017-12-31" unitRef="USD" decimals="-3">16110000</us-gaap:AcquisitionCosts>
    <us-gaap:MineralIndustriesDisclosuresTextBlock contextRef="From2018-01-01to2018-03-31">&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0.5in; text-indent: -0.5in"&gt;&lt;b&gt;2.&amp;#160;&amp;#160;&amp;#160;&amp;#160;&amp;#160;&amp;#160;&amp;#160;&amp;#160;Mineral&#13;Property&lt;/b&gt;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0.5in; text-indent: -0.5in"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0"&gt;The following table details Solitario&amp;#8217;s investment&#13;in Mineral Property:&lt;/p&gt;&#13;&#13;&lt;table cellspacing="0" cellpadding="0" style="font: 10pt Times New Roman, Times, Serif; width: 100%; border-collapse: collapse"&gt;&#13;&lt;tr&gt;&#13;    &lt;td style="vertical-align: top; padding-right: 5.4pt; padding-left: 5.4pt; layout-grid-mode: line"&gt;(in thousands)&lt;/td&gt;&#13;    &lt;td colspan="2" style="vertical-align: bottom; padding-right: 5.4pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: center"&gt;March 31,&lt;/td&gt;&#13;    &lt;td style="vertical-align: bottom; padding-right: 5.4pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: center"&gt;December 31,&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr&gt;&#13;    &lt;td style="vertical-align: top; padding-right: 5.4pt; padding-left: 5.4pt; layout-grid-mode: line"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="vertical-align: bottom; border-bottom: Black 1pt solid; padding-right: 5.4pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: center"&gt;2018&lt;/td&gt;&#13;    &lt;td colspan="2" style="vertical-align: bottom; border-bottom: Black 1pt solid; padding-right: 5.4pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: center"&gt;2017&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: bottom"&gt;&#13;    &lt;td style="padding-right: 5.4pt; padding-left: 5.4pt; layout-grid-mode: line"&gt;Exploration&lt;/td&gt;&#13;    &lt;td style="padding-right: 5.4pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: right"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td colspan="2" style="padding-right: 5.4pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: right"&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: bottom"&gt;&#13;    &lt;td style="padding-right: 5.4pt; padding-left: 5.4pt; layout-grid-mode: line"&gt;&amp;#160;&amp;#160;&amp;#160;Lik project (Alaska &amp;#8211; US)&lt;/td&gt;&#13;    &lt;td style="padding-right: 5.4pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: right"&gt;$15,611&amp;#160;&lt;/td&gt;&#13;    &lt;td colspan="2" style="padding-right: 5.4pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: right"&gt;$15,611&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: bottom"&gt;&#13;    &lt;td style="padding-right: 5.4pt; padding-left: 5.4pt; layout-grid-mode: line"&gt;&amp;#160;&amp;#160;&amp;#160;La Promesa (Peru)&lt;/td&gt;&#13;    &lt;td style="padding-right: 5.4pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: right"&gt;6&amp;#160;&lt;/td&gt;&#13;    &lt;td colspan="2" style="padding-right: 5.4pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: right"&gt;6&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: bottom"&gt;&#13;    &lt;td style="padding-right: 5.4pt; padding-left: 5.4pt; layout-grid-mode: line"&gt;&amp;#160;&amp;#160;&amp;#160;Montana Royalty property (US)&lt;/td&gt;&#13;    &lt;td style="padding-right: 5.4pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: right"&gt;40&amp;#160;&lt;/td&gt;&#13;    &lt;td colspan="2" style="padding-right: 5.4pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: right"&gt;40&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: bottom"&gt;&#13;    &lt;td style="padding-right: 5.4pt; padding-left: 5.4pt; layout-grid-mode: line"&gt;&amp;#160;&amp;#160;&amp;#160;&amp;#160;&amp;#160;Total exploration mineral property&lt;/td&gt;&#13;    &lt;td style="border-top: Black 1pt solid; border-bottom: Black 1pt solid; padding-right: 5.4pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: right"&gt;&amp;#160;&amp;#160;$15,657&amp;#160;&lt;/td&gt;&#13;    &lt;td colspan="2" style="border-top: Black 1pt solid; border-bottom: Black 1pt solid; padding-right: 5.4pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: right"&gt;&amp;#160;&amp;#160;$15,657&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr&gt;&#13;    &lt;td style="width: 71%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="width: 14%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="width: 1%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="width: 14%"&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;/table&gt;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0; text-indent: 0.5in"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0; text-indent: 0.5in"&gt;All exploration costs on our other&#13;exploration properties, none of which have proven and probable reserves, including any additional costs incurred for subsequent&#13;lease payments or exploration activities related to our projects are expensed as incurred.&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0.5in; text-indent: -0.5in"&gt;&lt;u&gt;Exploration expense&lt;/u&gt;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0"&gt;The following items comprised exploration expense:&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;table cellspacing="0" cellpadding="0" style="width: 100%; font: 10pt Times New Roman, Times, Serif; border-collapse: collapse"&gt;&#13;&lt;tr&gt;&#13;    &lt;td style="vertical-align: top; padding-right: 0.55in; padding-left: 5.4pt; layout-grid-mode: line"&gt;(in thousands)&lt;/td&gt;&#13;    &lt;td colspan="2" style="vertical-align: bottom; border-bottom: Black 1pt solid; padding-right: 8.1pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: center"&gt;Three months ended&lt;br /&gt;&#13;&amp;#160;March 31,&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr&gt;&#13;    &lt;td style="vertical-align: top; width: 72%; padding-right: 0.55in; padding-left: 5.4pt; layout-grid-mode: line"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="vertical-align: bottom; width: 14%; border-bottom: Black 1pt solid; padding-right: 8.1pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: center"&gt;2018&lt;/td&gt;&#13;    &lt;td style="vertical-align: bottom; width: 14%; border-top: Black 1pt solid; border-bottom: Black 1pt solid; padding-right: 8.1pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: center"&gt;2017&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr&gt;&#13;    &lt;td style="vertical-align: top; padding-right: 0.55in; padding-left: 5.4pt; layout-grid-mode: line"&gt;Geologic and field expenses&lt;/td&gt;&#13;    &lt;td style="vertical-align: bottom; padding-right: 8.1pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: right"&gt;$24&amp;#160;&lt;/td&gt;&#13;    &lt;td style="vertical-align: bottom; padding-right: 8.1pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: right"&gt;$22&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr&gt;&#13;    &lt;td style="vertical-align: top; padding-right: 0.55in; padding-left: 5.4pt; layout-grid-mode: line"&gt;Administrative&lt;/td&gt;&#13;    &lt;td style="vertical-align: bottom; padding-right: 8.1pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: right"&gt;156&amp;#160;&lt;/td&gt;&#13;    &lt;td style="vertical-align: bottom; padding-right: 8.1pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: right"&gt;129&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr&gt;&#13;    &lt;td style="vertical-align: top; padding-right: 0.55in; padding-left: 5.4pt; layout-grid-mode: line"&gt;Total exploration costs&lt;/td&gt;&#13;    &lt;td style="vertical-align: bottom; border-top: Black 1pt solid; border-bottom: Black 1pt solid; padding-right: 8.1pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: right"&gt;$ 180&amp;#160;&lt;/td&gt;&#13;    &lt;td style="vertical-align: bottom; border-top: Black 1pt solid; border-bottom: Black 1pt solid; padding-right: 8.1pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: right"&gt;$ 151&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;/table&gt;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0"&gt;&lt;u&gt;Asset Retirement Obligation&lt;/u&gt;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0; text-indent: 0.5in"&gt;In connection with the Acquisition,&#13;Solitario recorded an asset retirement obligation of $125,000 for Solitario&amp;#8217;s estimated reclamation cost of the existing&#13;disturbance at the Lik project. This disturbance consists of an exploration camp including certain drill sites and access roads&#13;at the camp. The estimate was based upon estimated cash costs for reclamation as determined by the permitting bond required by&#13;the State of Alaska, for which Solitario has purchased a reclamation bond insurance policy in the event Solitario or its 50% partner,&#13;Teck, do not complete required reclamation.&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0; text-indent: 0.5in"&gt;Solitario has not applied a discount&#13;rate to the recorded asset retirement obligation as the estimated time frame for reclamation is not currently known, as reclamation&#13;is not expected to occur until the end of the Lik project life, which would follow future development and operations, the start&#13;of which cannot be estimated or assured at this time. Additionally, no depreciation will be recorded on the related asset for the&#13;asset retirement obligation until the Lik project goes into operation, which cannot be assured.&lt;/p&gt;</us-gaap:MineralIndustriesDisclosuresTextBlock>
    <XPL:ExplorationExpenseMineralProperties contextRef="From2018-01-01to2018-03-31_custom_LikProjectAlaskaMember" unitRef="USD" decimals="-3">15611000</XPL:ExplorationExpenseMineralProperties>
    <XPL:ExplorationExpenseMineralProperties contextRef="From2017-01-01to2017-12-31_custom_LikProjectAlaskaMember" unitRef="USD" decimals="-3">15611000</XPL:ExplorationExpenseMineralProperties>
    <XPL:ExplorationExpenseMineralProperties contextRef="From2018-01-01to2018-03-31_custom_LaPromesaPeruMember" unitRef="USD" decimals="-3">6000</XPL:ExplorationExpenseMineralProperties>
    <XPL:ExplorationExpenseMineralProperties contextRef="From2017-01-01to2017-12-31_custom_LaPromesaPeruMember" unitRef="USD" decimals="-3">6000</XPL:ExplorationExpenseMineralProperties>
    <XPL:ExplorationExpenseMineralProperties contextRef="From2018-01-01to2018-03-31_custom_MontanaRoyaltyPropertyMember" unitRef="USD" decimals="-3">40000</XPL:ExplorationExpenseMineralProperties>
    <XPL:ExplorationExpenseMineralProperties contextRef="From2017-01-01to2017-12-31_custom_MontanaRoyaltyPropertyMember" unitRef="USD" decimals="-3">40000</XPL:ExplorationExpenseMineralProperties>
    <XPL:ExplorationExpenseMineralProperties contextRef="From2018-01-01to2018-03-31_custom_TotalExplorationMineralPropertyMember" unitRef="USD" decimals="-3">15657000</XPL:ExplorationExpenseMineralProperties>
    <XPL:ExplorationExpenseMineralProperties contextRef="From2017-01-01to2017-12-31_custom_TotalExplorationMineralPropertyMember" unitRef="USD" decimals="-3">15657000</XPL:ExplorationExpenseMineralProperties>
    <XPL:ExplorationGeologicAndFieldExpense contextRef="From2018-01-01to2018-03-31" unitRef="USD" decimals="-3">24000</XPL:ExplorationGeologicAndFieldExpense>
    <XPL:ExplorationGeologicAndFieldExpense contextRef="From2017-01-01to2017-03-31" unitRef="USD" decimals="-3">22000</XPL:ExplorationGeologicAndFieldExpense>
    <us-gaap:OtherGeneralAndAdministrativeExpense contextRef="From2018-01-01to2018-03-31" unitRef="USD" decimals="-3">156000</us-gaap:OtherGeneralAndAdministrativeExpense>
    <us-gaap:OtherGeneralAndAdministrativeExpense contextRef="From2017-01-01to2017-03-31" unitRef="USD" decimals="-3">129000</us-gaap:OtherGeneralAndAdministrativeExpense>
    <XPL:InvestmentsDebtAndEquitySecuritiesTextBlock contextRef="From2018-01-01to2018-03-31">&lt;p style="margin: 0pt"&gt;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0"&gt;&lt;b&gt;3. &amp;#160;&amp;#160;&amp;#160;&amp;#160;&amp;#160;&amp;#160;&amp;#160;Marketable&#13;Equity Securities&lt;/b&gt;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0; text-indent: 0.5in"&gt;Solitario's investments in marketable&#13;equity securities are classified as available-for-sale and are carried at fair value, which is based upon quoted prices of the&#13;securities owned. The cost of marketable equity securities sold is determined by the specific identification method. Changes in&#13;market value are recorded in the consolidated statement of operations. During the three months ended March 31, 2018, Solitario&#13;recorded an unrealized loss on marketable equity securities of $441,000. During the three months ended March 31, 2017, Solitario&#13;recorded an unrealized gain on marketable equity securities of $128,000.&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0; text-indent: 0.5in"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0; text-indent: 0.5in"&gt;On May 2, 2016 Solitario purchased&#13;7,240,000 units of Vendetta for aggregate consideration of $289,000. Each unit included one common share of Vendetta and one Vendetta&#13;Warrant. The total purchase price for the units of $289,000 was allocated between the Vendetta common shares and the Vendetta Warrants&#13;based upon total fair values on the date of purchase. The Vendetta common shares were allocated a purchase cost of $186,000 and&#13;the Vendetta Warrants were allocated a purchase cost of $103,000. During the three months ended March 31, 2017, Solitario sold&#13;1,480,000 common shares of Vendetta for proceeds of $259,000, and a recorded cost of $38,000. In addition, during the three months&#13;ended March 31, 2017 Solitario exercised 2,240,000 of the Vendetta Warrants it held and received 2,240,000 Vendetta common shares,&#13;by paying $167,000 (Cdn$224,000) to Vendetta. The cost of the common shares received from the exercise of the Vendetta Warrants&#13;was recorded based upon the total of the (i) exercise price of the Vendetta Warrants exercised, $167,000, and (ii) the fair value&#13;of the Vendetta Warrants on the date of exercise, which equaled their intrinsic value, $309,000, for a total value of $476,000.&#13;During 2017, subsequent to March 31, 2017, Solitario exercised its remaining 5,000,000 Vendetta Warrants by paying $441,000 and&#13;owns 11,000,000 common shares of Vendetta and no Vendetta Warrants as of March 31, 2018 and December 31, 2017.&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0; text-indent: 0.5in"&gt;The following tables summarize Solitario&amp;#8217;s&#13;marketable equity securities and adjustments to fair value:&lt;/p&gt;&#13;&#13;&lt;table cellspacing="0" cellpadding="0" style="font: 10pt Times New Roman, Times, Serif; width: 100%; border-collapse: collapse"&gt;&#13;&lt;tr style="vertical-align: bottom"&gt;&#13;    &lt;td style="width: 72%; layout-grid-mode: line; text-align: justify"&gt;(in thousands)&lt;/td&gt;&#13;    &lt;td style="width: 14%; border-bottom: Black 1pt solid; padding-right: 4.5pt; layout-grid-mode: line; text-align: center"&gt;&amp;#160;&amp;#160;&amp;#160;&amp;#160;March 31, &amp;#160;&amp;#160;&amp;#160;&amp;#160;2018&lt;/td&gt;&#13;    &lt;td style="width: 14%; border-bottom: Black 1pt solid; padding-right: 4.5pt; layout-grid-mode: line; text-align: center"&gt;&amp;#160;December 31, &amp;#160;&amp;#160;&amp;#160;&amp;#160;2017&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: bottom"&gt;&#13;    &lt;td style="layout-grid-mode: line"&gt;&amp;#160;&amp;#160;Marketable equity at cost&lt;/td&gt;&#13;    &lt;td style="padding-right: 4.5pt; layout-grid-mode: line; text-align: right"&gt;$1,714&amp;#160;&lt;/td&gt;&#13;    &lt;td style="padding-right: 9pt; layout-grid-mode: line; text-align: right"&gt;$1,714&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: bottom"&gt;&#13;    &lt;td style="layout-grid-mode: line"&gt;&amp;#160;&amp;#160;Unrealized gain on marketable equity securities&lt;/td&gt;&#13;    &lt;td style="border-bottom: Black 1pt solid; padding-right: 4.5pt; layout-grid-mode: line; text-align: right"&gt;488&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: Black 1pt solid; padding-right: 9pt; layout-grid-mode: line; text-align: right"&gt;&amp;#160;&amp;#160;&amp;#160;929&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: bottom"&gt;&#13;    &lt;td style="layout-grid-mode: line"&gt;&amp;#160;&amp;#160;Marketable equity securities at fair value&lt;/td&gt;&#13;    &lt;td style="border-bottom: Black 1pt solid; padding-right: 4.5pt; layout-grid-mode: line; text-align: right"&gt;$2,202&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: Black 1pt solid; padding-right: 9pt; layout-grid-mode: line; text-align: right"&gt;$2,643&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;/table&gt;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0; text-indent: 0.5in"&gt;&amp;#160;&amp;#160;&amp;#160;&amp;#160;&amp;#160;&amp;#160;&amp;#160;&amp;#160;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0"&gt;The following table represents changes, including sales,&#13;in marketable equity securities during the three months ended March 31, 2018 and 2017:&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;table cellspacing="0" cellpadding="0" style="font: 10pt Times New Roman, Times, Serif; width: 100%; border-collapse: collapse"&gt;&#13;&lt;tr style="vertical-align: bottom"&gt;&#13;    &lt;td style="padding-right: 5.4pt; padding-left: 5.4pt; layout-grid-mode: line"&gt;(in thousands)&lt;/td&gt;&#13;    &lt;td colspan="2" style="padding-right: 5.4pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: center"&gt;Three months ended&lt;br /&gt;&#13;March 31,&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: bottom"&gt;&#13;    &lt;td style="width: 72%; padding-right: 5.4pt; padding-left: 5.4pt; layout-grid-mode: line"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="width: 14%; border-bottom: Black 1pt solid; padding-right: 5.4pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: center"&gt;2018&lt;/td&gt;&#13;    &lt;td style="width: 14%; border-bottom: Black 1pt solid; padding-right: 5.4pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: center"&gt;2017&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: bottom"&gt;&#13;    &lt;td style="padding-right: 5.4pt; padding-left: 5.4pt; layout-grid-mode: line"&gt;Cost of marketable equity securities sold&lt;/td&gt;&#13;    &lt;td style="padding-right: -0.9pt; padding-left: 0.1in; layout-grid-mode: line; text-align: right"&gt;$&amp;#160;&amp;#160;&amp;#160;-&amp;#160;&amp;#160;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="padding-right: 3.75pt; padding-left: 0.1in; layout-grid-mode: line; text-align: right"&gt;$&amp;#160;&amp;#160;&amp;#160;38&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: bottom"&gt;&#13;    &lt;td style="padding-right: 5.4pt; padding-left: 5.4pt; layout-grid-mode: line"&gt;Realized gain on marketable equity securities sold&lt;/td&gt;&#13;    &lt;td style="border-bottom: Black 1pt solid; padding-right: -0.9pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: right"&gt;-&amp;#160;&amp;#160;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: Black 1pt solid; padding-right: 3.75pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: right"&gt;221&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: bottom"&gt;&#13;    &lt;td style="padding-right: 5.4pt; padding-left: 5.4pt; layout-grid-mode: line"&gt;Proceeds from the sale of marketable equity securities sold&lt;/td&gt;&#13;    &lt;td style="padding-right: -0.9pt; padding-left: 0.1in; layout-grid-mode: line; text-align: right"&gt;-&amp;#160;&amp;#160;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="padding-right: 3.75pt; padding-left: 0.1in; layout-grid-mode: line; text-align: right"&gt;(259)&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: bottom"&gt;&#13;    &lt;td style="padding-right: 5.4pt; padding-left: 5.4pt; layout-grid-mode: line"&gt;Purchase of marketable equity securities&lt;/td&gt;&#13;    &lt;td style="padding-right: -0.9pt; padding-left: 0.1in; layout-grid-mode: line; text-align: right"&gt;-&amp;#160;&amp;#160;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="padding-right: 3.75pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: right"&gt;477&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: bottom"&gt;&#13;    &lt;td style="padding-right: 5.4pt; padding-left: 5.4pt; layout-grid-mode: line"&gt;Gross unrealized (loss) gain recorded in the statement of operations&lt;/td&gt;&#13;    &lt;td style="padding-right: -0.9pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: right"&gt;(441)&lt;/td&gt;&#13;    &lt;td style="padding-right: 3.75pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: right"&gt;128&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: bottom"&gt;&#13;    &lt;td style="padding-right: 5.4pt; padding-left: 5.4pt; layout-grid-mode: line"&gt;Change in marketable equity securities at fair value&lt;/td&gt;&#13;    &lt;td style="border-top: Black 1pt solid; border-bottom: Black 1pt solid; padding-right: -0.9pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: right"&gt;$(441)&lt;/td&gt;&#13;    &lt;td style="border-top: Black 1pt solid; border-bottom: Black 1pt solid; padding-right: 3.75pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: right"&gt;&amp;#160;&amp;#160;&amp;#160;$ 346&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;/table&gt;&#13;&#13;&#13;&lt;p style="margin: 0pt"&gt;&lt;/p&gt;</XPL:InvestmentsDebtAndEquitySecuritiesTextBlock>
    <us-gaap:InvestmentsInDebtAndMarketableEquitySecuritiesAndCertainTradingAssetsDisclosureTextBlock contextRef="From2018-01-01to2018-03-31">&lt;table cellspacing="0" cellpadding="0" style="font: 10pt Times New Roman, Times, Serif; width: 100%; border-collapse: collapse"&gt;&#13;&lt;tr style="vertical-align: bottom"&gt;&#13;    &lt;td style="width: 72%; layout-grid-mode: line; text-align: justify"&gt;(in thousands)&lt;/td&gt;&#13;    &lt;td style="width: 14%; border-bottom: Black 1pt solid; padding-right: 4.5pt; layout-grid-mode: line; text-align: center"&gt;&amp;#160;&amp;#160;&amp;#160;&amp;#160;March 31, &amp;#160;&amp;#160;&amp;#160;&amp;#160;2018&lt;/td&gt;&#13;    &lt;td style="width: 14%; border-bottom: Black 1pt solid; padding-right: 4.5pt; layout-grid-mode: line; text-align: center"&gt;&amp;#160;December 31, &amp;#160;&amp;#160;&amp;#160;&amp;#160;2017&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: bottom"&gt;&#13;    &lt;td style="layout-grid-mode: line"&gt;&amp;#160;&amp;#160;Marketable equity at cost&lt;/td&gt;&#13;    &lt;td style="padding-right: 4.5pt; layout-grid-mode: line; text-align: right"&gt;$1,714&amp;#160;&lt;/td&gt;&#13;    &lt;td style="padding-right: 9pt; layout-grid-mode: line; text-align: right"&gt;$1,714&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: bottom"&gt;&#13;    &lt;td style="layout-grid-mode: line"&gt;&amp;#160;&amp;#160;Unrealized gain on marketable equity securities&lt;/td&gt;&#13;    &lt;td style="border-bottom: Black 1pt solid; padding-right: 4.5pt; layout-grid-mode: line; text-align: right"&gt;488&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: Black 1pt solid; padding-right: 9pt; layout-grid-mode: line; text-align: right"&gt;&amp;#160;&amp;#160;&amp;#160;929&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: bottom"&gt;&#13;    &lt;td style="layout-grid-mode: line"&gt;&amp;#160;&amp;#160;Marketable equity securities at fair value&lt;/td&gt;&#13;    &lt;td style="border-bottom: Black 1pt solid; padding-right: 4.5pt; layout-grid-mode: line; text-align: right"&gt;2,202&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: Black 1pt solid; padding-right: 9pt; layout-grid-mode: line; text-align: right"&gt;$2,643&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;/table&gt;</us-gaap:InvestmentsInDebtAndMarketableEquitySecuritiesAndCertainTradingAssetsDisclosureTextBlock>
    <us-gaap:GainLossOnInvestmentsTextBlock contextRef="From2018-01-01to2018-03-31">&lt;table cellspacing="0" cellpadding="0" style="font: 10pt Times New Roman, Times, Serif; width: 100%; border-collapse: collapse"&gt;&#13;&lt;tr style="vertical-align: bottom"&gt;&#13;    &lt;td style="padding-right: 5.4pt; padding-left: 5.4pt; layout-grid-mode: line"&gt;(in thousands)&lt;/td&gt;&#13;    &lt;td colspan="2" style="padding-right: 5.4pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: center"&gt;Three months ended&lt;br /&gt;&#13;March 31,&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: bottom"&gt;&#13;    &lt;td style="width: 72%; padding-right: 5.4pt; padding-left: 5.4pt; layout-grid-mode: line"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="width: 14%; border-bottom: Black 1pt solid; padding-right: 5.4pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: center"&gt;2018&lt;/td&gt;&#13;    &lt;td style="width: 14%; border-bottom: Black 1pt solid; padding-right: 5.4pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: center"&gt;2017&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: bottom"&gt;&#13;    &lt;td style="padding-right: 5.4pt; padding-left: 5.4pt; layout-grid-mode: line"&gt;Cost of marketable equity securities sold&lt;/td&gt;&#13;    &lt;td style="padding-right: -0.9pt; padding-left: 0.1in; layout-grid-mode: line; text-align: right"&gt;$&amp;#160;&amp;#160;&amp;#160;-&amp;#160;&amp;#160;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="padding-right: 3.75pt; padding-left: 0.1in; layout-grid-mode: line; text-align: right"&gt;$&amp;#160;&amp;#160;&amp;#160;38&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: bottom"&gt;&#13;    &lt;td style="padding-right: 5.4pt; padding-left: 5.4pt; layout-grid-mode: line"&gt;Realized gain on marketable equity securities sold&lt;/td&gt;&#13;    &lt;td style="border-bottom: Black 1pt solid; padding-right: -0.9pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: right"&gt;-&amp;#160;&amp;#160;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: Black 1pt solid; padding-right: 3.75pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: right"&gt;221&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: bottom"&gt;&#13;    &lt;td style="padding-right: 5.4pt; padding-left: 5.4pt; layout-grid-mode: line"&gt;Proceeds from the sale of marketable equity securities sold&lt;/td&gt;&#13;    &lt;td style="padding-right: -0.9pt; padding-left: 0.1in; layout-grid-mode: line; text-align: right"&gt;-&amp;#160;&amp;#160;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="padding-right: 3.75pt; padding-left: 0.1in; layout-grid-mode: line; text-align: right"&gt;(259)&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: bottom"&gt;&#13;    &lt;td style="padding-right: 5.4pt; padding-left: 5.4pt; layout-grid-mode: line"&gt;Purchase of marketable equity securities&lt;/td&gt;&#13;    &lt;td style="padding-right: -0.9pt; padding-left: 0.1in; layout-grid-mode: line; text-align: right"&gt;-&amp;#160;&amp;#160;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="padding-right: 3.75pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: right"&gt;477&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: bottom"&gt;&#13;    &lt;td style="padding-right: 5.4pt; padding-left: 5.4pt; layout-grid-mode: line"&gt;Gross unrealized (loss) gain recorded in the statement of operations&lt;/td&gt;&#13;    &lt;td style="padding-right: -0.9pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: right"&gt;(441)&lt;/td&gt;&#13;    &lt;td style="padding-right: 3.75pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: right"&gt;128&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: bottom"&gt;&#13;    &lt;td style="padding-right: 5.4pt; padding-left: 5.4pt; layout-grid-mode: line"&gt;Change in marketable equity securities at fair value&lt;/td&gt;&#13;    &lt;td style="border-top: Black 1pt solid; border-bottom: Black 1pt solid; padding-right: -0.9pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: right"&gt;(441)&lt;/td&gt;&#13;    &lt;td style="border-top: Black 1pt solid; border-bottom: Black 1pt solid; padding-right: 3.75pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: right"&gt;&amp;#160;&amp;#160;&amp;#160;$ 346&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;/table&gt;</us-gaap:GainLossOnInvestmentsTextBlock>
    <us-gaap:InvestmentsFairValueDisclosure contextRef="AsOf2018-03-31" unitRef="USD" decimals="-3">2202000</us-gaap:InvestmentsFairValueDisclosure>
    <us-gaap:InvestmentsFairValueDisclosure contextRef="AsOf2017-12-31" unitRef="USD" decimals="-3">2643000</us-gaap:InvestmentsFairValueDisclosure>
    <us-gaap:InvestmentsFairValueDisclosure contextRef="AsOf2018-03-31_us-gaap_FairValueInputsLevel1Member" unitRef="USD" decimals="-3">2202000</us-gaap:InvestmentsFairValueDisclosure>
    <us-gaap:InvestmentsFairValueDisclosure contextRef="AsOf2017-12-31_us-gaap_FairValueInputsLevel1Member" unitRef="USD" decimals="-3">2643000</us-gaap:InvestmentsFairValueDisclosure>
    <us-gaap:InvestmentsFairValueDisclosure contextRef="AsOf2018-03-31_us-gaap_FairValueInputsLevel2Member" unitRef="USD" xsi:nil="true" />
    <us-gaap:InvestmentsFairValueDisclosure contextRef="AsOf2017-12-31_us-gaap_FairValueInputsLevel2Member" unitRef="USD" xsi:nil="true" />
    <us-gaap:InvestmentsFairValueDisclosure contextRef="AsOf2018-03-31_us-gaap_FairValueInputsLevel3Member" unitRef="USD" xsi:nil="true" />
    <us-gaap:InvestmentsFairValueDisclosure contextRef="AsOf2017-12-31_us-gaap_FairValueInputsLevel3Member" unitRef="USD" xsi:nil="true" />
    <us-gaap:TradingSecuritiesCost contextRef="AsOf2018-03-31" unitRef="USD" decimals="-3">1714000</us-gaap:TradingSecuritiesCost>
    <us-gaap:TradingSecuritiesCost contextRef="AsOf2017-12-31" unitRef="USD" decimals="-3">1714000</us-gaap:TradingSecuritiesCost>
    <us-gaap:AvailableForSaleSecuritiesAccumulatedGrossUnrealizedGainLossBeforeTax contextRef="AsOf2018-03-31" unitRef="USD" decimals="-3">488000</us-gaap:AvailableForSaleSecuritiesAccumulatedGrossUnrealizedGainLossBeforeTax>
    <us-gaap:AvailableForSaleSecuritiesAccumulatedGrossUnrealizedGainLossBeforeTax contextRef="AsOf2017-12-31" unitRef="USD" decimals="-3">929000</us-gaap:AvailableForSaleSecuritiesAccumulatedGrossUnrealizedGainLossBeforeTax>
    <XPL:CostMarketableSecurities contextRef="From2018-01-01to2018-03-31" unitRef="USD" xsi:nil="true" />
    <XPL:CostMarketableSecurities contextRef="From2017-01-01to2017-03-31" unitRef="USD" decimals="-3">38000</XPL:CostMarketableSecurities>
    <us-gaap:ProceedsFromSaleOfAvailableForSaleSecuritiesEquity contextRef="From2018-01-01to2018-03-31" unitRef="USD" xsi:nil="true" />
    <us-gaap:ProceedsFromSaleOfAvailableForSaleSecuritiesEquity contextRef="From2017-01-01to2017-03-31" unitRef="USD" decimals="-3">-259000</us-gaap:ProceedsFromSaleOfAvailableForSaleSecuritiesEquity>
    <us-gaap:RealizedGainLossOnMarketableSecuritiesCostMethodInvestmentsAndOtherInvestments contextRef="From2018-01-01to2018-03-31" unitRef="USD" xsi:nil="true" />
    <us-gaap:RealizedGainLossOnMarketableSecuritiesCostMethodInvestmentsAndOtherInvestments contextRef="From2017-01-01to2017-03-31" unitRef="USD" decimals="-3">221000</us-gaap:RealizedGainLossOnMarketableSecuritiesCostMethodInvestmentsAndOtherInvestments>
    <us-gaap:MarketableSecuritiesUnrealizedGainLoss contextRef="From2018-01-01to2018-03-31" unitRef="USD" decimals="-3">-441000</us-gaap:MarketableSecuritiesUnrealizedGainLoss>
    <us-gaap:MarketableSecuritiesUnrealizedGainLoss contextRef="From2017-01-01to2017-03-31" unitRef="USD" decimals="-3">128000</us-gaap:MarketableSecuritiesUnrealizedGainLoss>
    <us-gaap:IncreaseDecreaseInTradingSecurities contextRef="From2018-01-01to2018-03-31" unitRef="USD" decimals="-3">-441000</us-gaap:IncreaseDecreaseInTradingSecurities>
    <us-gaap:IncreaseDecreaseInTradingSecurities contextRef="From2017-01-01to2017-03-31" unitRef="USD" decimals="-3">346000</us-gaap:IncreaseDecreaseInTradingSecurities>
    <us-gaap:OtherAssetsDisclosureTextBlock contextRef="From2018-01-01to2018-03-31">&lt;p style="margin: 0pt"&gt;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0"&gt;&lt;b&gt;4.&amp;#160;&amp;#160;&amp;#160;&amp;#160;&amp;#160;&amp;#160;&amp;#160;&amp;#160;Other&#13;Assets&lt;/b&gt;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0"&gt;The following items comprised other assets:&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;table cellspacing="0" cellpadding="0" style="width: 100%; font: 10pt Times New Roman, Times, Serif; border-collapse: collapse"&gt;&#13;&lt;tr&gt;&#13;    &lt;td style="vertical-align: top; width: 72%; padding-right: 0.55in; padding-left: 5.4pt; layout-grid-mode: line"&gt;(in thousands)&lt;/td&gt;&#13;    &lt;td style="vertical-align: bottom; width: 14%; padding-right: 5.4pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: center"&gt;March 31,&lt;/td&gt;&#13;    &lt;td style="vertical-align: bottom; width: 14%; padding-right: 5.4pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: center"&gt;December 31&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr&gt;&#13;    &lt;td style="vertical-align: top; padding-right: 0.55in; padding-left: 5.4pt; layout-grid-mode: line"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="vertical-align: bottom; border-bottom: Black 1pt solid; padding-right: 8.1pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: center"&gt;2018&lt;/td&gt;&#13;    &lt;td style="vertical-align: bottom; border-bottom: Black 1pt solid; padding-right: 8.1pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: center"&gt;2017&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr&gt;&#13;    &lt;td style="vertical-align: top; padding-right: 0.55in; padding-left: 5.4pt; layout-grid-mode: line"&gt;Furniture and fixtures, net of accumulated depreciation&lt;/td&gt;&#13;    &lt;td style="vertical-align: bottom; padding-right: -0.9pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: right"&gt;&amp;#160;&amp;#160;$&amp;#160;&amp;#160;&amp;#160;38&amp;#160;&lt;/td&gt;&#13;    &lt;td style="vertical-align: bottom; padding-right: -0.9pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: right"&gt;&amp;#160;&amp;#160;$&amp;#160;&amp;#160;&amp;#160;31&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr&gt;&#13;    &lt;td style="vertical-align: top; padding-right: 0.55in; padding-left: 5.4pt; layout-grid-mode: line"&gt;Lik project equipment, net of accumulated depreciation&lt;/td&gt;&#13;    &lt;td style="vertical-align: bottom; padding-right: -0.9pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: right"&gt;85&amp;#160;&lt;/td&gt;&#13;    &lt;td style="vertical-align: bottom; padding-right: -0.9pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: right"&gt;90&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr&gt;&#13;    &lt;td style="vertical-align: top; padding-right: 0.55in; padding-left: 5.4pt; layout-grid-mode: line"&gt;Exploration bonds and other assets&lt;/td&gt;&#13;    &lt;td style="vertical-align: bottom; padding-right: -0.9pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: right"&gt;&amp;#160;&amp;#160;4&amp;#160;&lt;/td&gt;&#13;    &lt;td style="vertical-align: bottom; padding-right: -0.9pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: right"&gt;&amp;#160;&amp;#160;4&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr&gt;&#13;    &lt;td style="vertical-align: top; padding-right: 0.55in; padding-left: 5.4pt; layout-grid-mode: line"&gt;Total other assets&lt;/td&gt;&#13;    &lt;td style="vertical-align: bottom; border-top: Black 1pt solid; border-bottom: Black 1pt solid; padding-right: -0.9pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: right"&gt;$127&amp;#160;&lt;/td&gt;&#13;    &lt;td style="vertical-align: bottom; border-top: Black 1pt solid; border-bottom: Black 1pt solid; padding-right: -0.9pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: right"&gt;$125&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;/table&gt;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&#13;&#13;&lt;p style="margin: 0pt"&gt;&lt;/p&gt;</us-gaap:OtherAssetsDisclosureTextBlock>
    <us-gaap:ScheduleOfOtherAssetsTableTextBlock contextRef="From2018-01-01to2018-03-31">&lt;table cellspacing="0" cellpadding="0" style="width: 100%; font: 10pt Times New Roman, Times, Serif; border-collapse: collapse"&gt;&#13;&lt;tr&gt;&#13;    &lt;td style="vertical-align: top; width: 72%; padding-right: 0.55in; padding-left: 5.4pt; layout-grid-mode: line"&gt;(in thousands)&lt;/td&gt;&#13;    &lt;td style="vertical-align: bottom; width: 14%; padding-right: 5.4pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: center"&gt;March 31,&lt;/td&gt;&#13;    &lt;td style="vertical-align: bottom; width: 14%; padding-right: 5.4pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: center"&gt;December 31&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr&gt;&#13;    &lt;td style="vertical-align: top; padding-right: 0.55in; padding-left: 5.4pt; layout-grid-mode: line"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="vertical-align: bottom; border-bottom: Black 1pt solid; padding-right: 8.1pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: center"&gt;2018&lt;/td&gt;&#13;    &lt;td style="vertical-align: bottom; border-bottom: Black 1pt solid; padding-right: 8.1pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: center"&gt;2017&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr&gt;&#13;    &lt;td style="vertical-align: top; padding-right: 0.55in; padding-left: 5.4pt; layout-grid-mode: line"&gt;Furniture and fixtures, net of accumulated depreciation&lt;/td&gt;&#13;    &lt;td style="vertical-align: bottom; padding-right: -0.9pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: right"&gt;&amp;#160;&amp;#160;$&amp;#160;&amp;#160;&amp;#160;38&amp;#160;&lt;/td&gt;&#13;    &lt;td style="vertical-align: bottom; padding-right: -0.9pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: right"&gt;&amp;#160;&amp;#160;$&amp;#160;&amp;#160;&amp;#160;31&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr&gt;&#13;    &lt;td style="vertical-align: top; padding-right: 0.55in; padding-left: 5.4pt; layout-grid-mode: line"&gt;Lik project equipment, net of accumulated depreciation&lt;/td&gt;&#13;    &lt;td style="vertical-align: bottom; padding-right: -0.9pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: right"&gt;85&amp;#160;&lt;/td&gt;&#13;    &lt;td style="vertical-align: bottom; padding-right: -0.9pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: right"&gt;90&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr&gt;&#13;    &lt;td style="vertical-align: top; padding-right: 0.55in; padding-left: 5.4pt; layout-grid-mode: line"&gt;Exploration bonds and other assets&lt;/td&gt;&#13;    &lt;td style="vertical-align: bottom; padding-right: -0.9pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: right"&gt;&amp;#160;&amp;#160;4&amp;#160;&lt;/td&gt;&#13;    &lt;td style="vertical-align: bottom; padding-right: -0.9pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: right"&gt;&amp;#160;&amp;#160;4&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr&gt;&#13;    &lt;td style="vertical-align: top; padding-right: 0.55in; padding-left: 5.4pt; layout-grid-mode: line"&gt;Total other assets&lt;/td&gt;&#13;    &lt;td style="vertical-align: bottom; border-top: Black 1pt solid; border-bottom: Black 1pt solid; padding-right: -0.9pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: right"&gt;$127&amp;#160;&lt;/td&gt;&#13;    &lt;td style="vertical-align: bottom; border-top: Black 1pt solid; border-bottom: Black 1pt solid; padding-right: -0.9pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: right"&gt;$125&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;/table&gt;</us-gaap:ScheduleOfOtherAssetsTableTextBlock>
    <us-gaap:PropertyPlantAndEquipmentNet contextRef="AsOf2018-03-31" unitRef="USD" decimals="-3">38000</us-gaap:PropertyPlantAndEquipmentNet>
    <us-gaap:PropertyPlantAndEquipmentNet contextRef="AsOf2017-12-31" unitRef="USD" decimals="-3">31000</us-gaap:PropertyPlantAndEquipmentNet>
    <us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedEquipment contextRef="AsOf2018-03-31" unitRef="USD" decimals="-3">85000</us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedEquipment>
    <us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedEquipment contextRef="AsOf2017-12-31" unitRef="USD" decimals="-3">90000</us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedEquipment>
    <XPL:OtherAssetsVendettaWarrants contextRef="AsOf2018-03-31" unitRef="USD" decimals="-3">4000</XPL:OtherAssetsVendettaWarrants>
    <XPL:OtherAssetsVendettaWarrants contextRef="AsOf2017-12-31" unitRef="USD" decimals="-3">4000</XPL:OtherAssetsVendettaWarrants>
    <us-gaap:OtherAssets contextRef="AsOf2018-03-31" unitRef="USD" decimals="-3">127000</us-gaap:OtherAssets>
    <us-gaap:OtherAssets contextRef="AsOf2017-12-31" unitRef="USD" decimals="-3">125000</us-gaap:OtherAssets>
    <us-gaap:DerivativeInstrumentsAndHedgingActivitiesDisclosureTextBlock contextRef="From2018-01-01to2018-03-31">&lt;p style="margin: 0pt"&gt;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0"&gt;&lt;b&gt;5.&amp;#160;&amp;#160;&amp;#160;&amp;#160;&amp;#160;&amp;#160;&amp;#160;&amp;#160;Derivative&#13;Instruments&lt;/b&gt;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0"&gt;&lt;u&gt;Vendetta Warrants&lt;/u&gt;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0; text-indent: 0.5in"&gt;During the three months ended March&#13;31, 2017, Solitario exercised 2,240,000 of the Vendetta Warrants it held and received 2,240,000 Vendetta common shares, by paying&#13;$167,000 (Cdn$224,000) to Vendetta. As a result, as of March 31, 2017, Solitario owned 5,000,000 Vendetta Warrants, which are carried&#13;at fair value, based upon a Black-Scholes model. During the three months ended March 31, 2017, Solitario recorded a gain on derivative&#13;instruments of $148,000, related to the Vendetta Warrants. Solitario owned no Vendetta Warrants during the three months ended March&#13;31, 2018; see Note 3, &amp;#8220;Marketable equity securities,&amp;#8221; above.&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0 44.1pt 0 0"&gt;&lt;u&gt;Covered Call Options &lt;/u&gt;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0 44.1pt 0 0"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0 44.1pt 0 0; text-indent: 0.5in"&gt;From time to time Solitario has sold&#13;covered call options against its holdings of Kinross. The business purpose of selling covered calls is to provide additional liquidity&#13;on a limited portion of shares of Kinross that Solitario may sell in the near term, which is generally defined as less than one&#13;year. Solitario has not designated its covered calls as hedging instruments and records gains or loss on the covered call in the&#13;period of the change.&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0 44.1pt 0 0; text-indent: 0.5in"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0; text-align: left"&gt;Solitario recorded the following gain&#13;on derivative instruments:&lt;/p&gt;&#13;&#13;&lt;table cellspacing="0" cellpadding="0" style="font: 10pt Times New Roman, Times, Serif; width: 100%; border-collapse: collapse"&gt;&#13;&lt;tr&gt;&#13;    &lt;td style="vertical-align: top; padding-right: 0.55in; padding-left: 5.4pt; layout-grid-mode: line"&gt;(in thousands)&lt;/td&gt;&#13;    &lt;td colspan="2" style="vertical-align: bottom; padding-right: 5.4pt; padding-left: 5.4pt"&gt;&#13;        &lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0 0.05in 0 0; text-align: center"&gt;Three months ended&lt;/p&gt;&#13;        &lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0 0.05in 0 0; text-align: center"&gt;March 31,&lt;/p&gt;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr&gt;&#13;    &lt;td style="vertical-align: top; width: 74%; padding-right: 0.55in; padding-left: 5.4pt; layout-grid-mode: line"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="vertical-align: bottom; width: 13%; border-bottom: Black 1pt solid; padding-right: 5.4pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: center"&gt;&amp;#160;2018&lt;/td&gt;&#13;    &lt;td style="vertical-align: bottom; width: 13%; border-bottom: Black 1pt solid; padding-right: 5.4pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: center"&gt;&amp;#160;2017&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr&gt;&#13;    &lt;td style="vertical-align: top; padding-right: 0.55in; padding-left: 5.4pt; layout-grid-mode: line"&gt;&amp;#160;&amp;#160;Gain (loss) on Kinross calls&lt;/td&gt;&#13;    &lt;td style="vertical-align: bottom; padding-right: 0.05in; padding-left: 5.4pt; layout-grid-mode: line; text-align: right"&gt;&amp;#160;$&amp;#160;&amp;#160;-&amp;#160;&amp;#160;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="vertical-align: bottom; padding-right: 0.05in; padding-left: 5.4pt; layout-grid-mode: line; text-align: right"&gt;&amp;#160;$&amp;#160;&amp;#160;24&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr&gt;&#13;    &lt;td style="vertical-align: top; padding-right: 0.55in; padding-left: 5.4pt; layout-grid-mode: line"&gt;&amp;#160;&amp;#160;Gain on Vendetta Warrants&lt;/td&gt;&#13;    &lt;td style="vertical-align: bottom; border-bottom: Black 1pt solid; padding-right: 0.05in; padding-left: 5.4pt; layout-grid-mode: line; text-align: right"&gt;-&amp;#160;&amp;#160;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="vertical-align: bottom; border-bottom: Black 1pt solid; padding-right: 0.05in; padding-left: 5.4pt; layout-grid-mode: line; text-align: right"&gt;148&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr&gt;&#13;    &lt;td style="vertical-align: top; padding-right: 0.55in; padding-left: 5.4pt; layout-grid-mode: line"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="vertical-align: bottom; border-bottom: Black 1pt solid; padding-right: 0.05in; padding-left: 5.4pt; layout-grid-mode: line; text-align: right"&gt;$&amp;#160;&amp;#160;-&amp;#160;&amp;#160;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="vertical-align: bottom; border-bottom: Black 1pt solid; padding-right: 0.05in; padding-left: 5.4pt; layout-grid-mode: line; text-align: right"&gt;$172&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;/table&gt;&#13;&#13;&#13;&lt;p style="margin: 0pt"&gt;&lt;/p&gt;</us-gaap:DerivativeInstrumentsAndHedgingActivitiesDisclosureTextBlock>
    <us-gaap:ScheduleOfDerivativeInstrumentsGainLossInStatementOfFinancialPerformanceTextBlock contextRef="From2018-01-01to2018-03-31">&lt;table cellspacing="0" cellpadding="0" style="font: 10pt Times New Roman, Times, Serif; width: 100%; border-collapse: collapse"&gt;&#13;&lt;tr&gt;&#13;    &lt;td style="vertical-align: top; padding-right: 0.55in; padding-left: 5.4pt; layout-grid-mode: line"&gt;(in thousands)&lt;/td&gt;&#13;    &lt;td colspan="2" style="vertical-align: bottom; padding-right: 5.4pt; padding-left: 5.4pt"&gt;&#13;        &lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0 0.05in 0 0; text-align: center"&gt;Three months ended&lt;/p&gt;&#13;        &lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0 0.05in 0 0; text-align: center"&gt;March 31,&lt;/p&gt;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr&gt;&#13;    &lt;td style="vertical-align: top; width: 74%; padding-right: 0.55in; padding-left: 5.4pt; layout-grid-mode: line"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="vertical-align: bottom; width: 13%; border-bottom: Black 1pt solid; padding-right: 5.4pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: center"&gt;&amp;#160;2018&lt;/td&gt;&#13;    &lt;td style="vertical-align: bottom; width: 13%; border-bottom: Black 1pt solid; padding-right: 5.4pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: center"&gt;&amp;#160;2017&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr&gt;&#13;    &lt;td style="vertical-align: top; padding-right: 0.55in; padding-left: 5.4pt; layout-grid-mode: line"&gt;&amp;#160;&amp;#160;Gain (loss) on Kinross calls&lt;/td&gt;&#13;    &lt;td style="vertical-align: bottom; padding-right: 0.05in; padding-left: 5.4pt; layout-grid-mode: line; text-align: right"&gt;&amp;#160;$&amp;#160;&amp;#160;-&amp;#160;&amp;#160;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="vertical-align: bottom; padding-right: 0.05in; padding-left: 5.4pt; layout-grid-mode: line; text-align: right"&gt;&amp;#160;$&amp;#160;&amp;#160;24&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr&gt;&#13;    &lt;td style="vertical-align: top; padding-right: 0.55in; padding-left: 5.4pt; layout-grid-mode: line"&gt;&amp;#160;&amp;#160;Gain on Vendetta Warrants&lt;/td&gt;&#13;    &lt;td style="vertical-align: bottom; border-bottom: Black 1pt solid; padding-right: 0.05in; padding-left: 5.4pt; layout-grid-mode: line; text-align: right"&gt;-&amp;#160;&amp;#160;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="vertical-align: bottom; border-bottom: Black 1pt solid; padding-right: 0.05in; padding-left: 5.4pt; layout-grid-mode: line; text-align: right"&gt;148&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr&gt;&#13;    &lt;td style="vertical-align: top; padding-right: 0.55in; padding-left: 5.4pt; layout-grid-mode: line"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="vertical-align: bottom; border-bottom: Black 1pt solid; padding-right: 0.05in; padding-left: 5.4pt; layout-grid-mode: line; text-align: right"&gt;$&amp;#160;&amp;#160;-&amp;#160;&amp;#160;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="vertical-align: bottom; border-bottom: Black 1pt solid; padding-right: 0.05in; padding-left: 5.4pt; layout-grid-mode: line; text-align: right"&gt;$172&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;/table&gt;</us-gaap:ScheduleOfDerivativeInstrumentsGainLossInStatementOfFinancialPerformanceTextBlock>
    <XPL:GainOnCalls contextRef="From2018-01-01to2018-03-31" unitRef="USD" xsi:nil="true" />
    <XPL:GainOnCalls contextRef="From2017-01-01to2017-12-31" unitRef="USD" decimals="-3">24000</XPL:GainOnCalls>
    <XPL:GainOnWarrants contextRef="From2018-01-01to2018-03-31" unitRef="USD" xsi:nil="true" />
    <XPL:GainOnWarrants contextRef="From2017-01-01to2017-12-31" unitRef="USD" decimals="-3">148000</XPL:GainOnWarrants>
    <XPL:DerivativeInstrumentsNotDesignatedAsHedgingInstrumentsGainLossNet2 contextRef="From2018-01-01to2018-03-31" unitRef="USD" xsi:nil="true" />
    <XPL:DerivativeInstrumentsNotDesignatedAsHedgingInstrumentsGainLossNet2 contextRef="From2017-01-01to2017-12-31" unitRef="USD" decimals="-3">172000</XPL:DerivativeInstrumentsNotDesignatedAsHedgingInstrumentsGainLossNet2>
    <us-gaap:GainLossOnDerivativeInstrumentsNetPretax contextRef="From2017-01-01to2017-03-31" unitRef="USD" decimals="-3">148000000</us-gaap:GainLossOnDerivativeInstrumentsNetPretax>
    <us-gaap:FairValueDisclosuresTextBlock contextRef="From2018-01-01to2018-03-31">&lt;p style="margin: 0pt"&gt;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0"&gt;&lt;b&gt;6.&amp;#160;&amp;#160;&amp;#160;&amp;#160;&amp;#160;&amp;#160;&amp;#160;&amp;#160;Fair&#13;Value&lt;/b&gt;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt/12pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0; background-color: white"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt/12pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0; text-indent: 0.5in; background-color: white"&gt;For&#13;certain of Solitario&amp;#8217;s financial instruments, including cash and cash equivalents and payables, the carrying amounts approximate&#13;fair value due to their short-term maturities. Solitario&amp;#8217;s short-term investments in CD&amp;#8217;s and USTS, Kinross calls and&#13;marketable equity securities are carried at their estimated fair value primarily based on quoted market prices.&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt/12pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0; background-color: white"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt/12pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0; text-indent: 0.5in; background-color: white"&gt;Solitario&#13;accounts for its financial instruments under ASC 820. ASC 820 establishes a framework for measuring fair value and requires enhanced&#13;disclosures about fair value measurements. ASC 820 clarifies that fair value is an exit price, representing the amount that would&#13;be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants. ASC 820 also&#13;requires disclosure about how fair value is determined for assets and liabilities and establishes a hierarchy for which these assets&#13;and liabilities must be grouped, based on significant levels of inputs as follows:&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt/12pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0; background-color: white"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;table cellpadding="0" cellspacing="0" style="width: 100%; font: 11pt/115% Calibri, Helvetica, Sans-Serif; margin-top: 0; margin-bottom: 0"&gt;&lt;tr style="vertical-align: top"&gt;&#13;&lt;td style="width: 0.25in"&gt;&lt;/td&gt;&lt;td style="width: 0.25in"&gt;&lt;font style="font: 10pt Symbol"&gt;&amp;#183;&lt;/font&gt;&lt;/td&gt;&lt;td style="padding-right: 0.55in"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;&lt;b&gt;Level 1&lt;/b&gt;: quoted&#13;prices in active markets for identical assets or liabilities;&lt;/font&gt;&lt;/td&gt;&lt;/tr&gt;&lt;/table&gt;&#13;&#13;&lt;table cellpadding="0" cellspacing="0" style="width: 100%; font: 11pt/115% Calibri, Helvetica, Sans-Serif; margin-top: 0; margin-bottom: 0"&gt;&lt;tr style="vertical-align: top"&gt;&#13;&lt;td style="width: 0.25in"&gt;&lt;/td&gt;&lt;td style="width: 0.25in"&gt;&lt;font style="font: 10pt Symbol"&gt;&amp;#183;&lt;/font&gt;&lt;/td&gt;&lt;td style="padding-right: 0.55in"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;&lt;b&gt;Level 2&lt;/b&gt;: quoted&#13;prices in active markets for similar assets and liabilities and inputs that are observable for the asset or liability; or&lt;/font&gt;&lt;/td&gt;&lt;/tr&gt;&lt;/table&gt;&#13;&#13;&lt;table cellpadding="0" cellspacing="0" style="width: 100%; font: 11pt/115% Calibri, Helvetica, Sans-Serif; margin-top: 0; margin-bottom: 0"&gt;&lt;tr style="vertical-align: top"&gt;&#13;&lt;td style="width: 0.25in"&gt;&lt;/td&gt;&lt;td style="width: 0.25in"&gt;&lt;font style="font: 10pt Symbol"&gt;&amp;#183;&lt;/font&gt;&lt;/td&gt;&lt;td style="padding-right: 0.55in"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;&lt;b&gt;Level 3&lt;/b&gt;: Unobservable&#13;inputs in which there is little or no market data, which require the reporting entity to develop its own assumptions.&lt;/font&gt;&lt;/td&gt;&lt;/tr&gt;&lt;/table&gt;&#13;&#13;&lt;p style="font: 10pt/12pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0; background-color: white"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt/12pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0; text-indent: 0.5in; background-color: white"&gt;The&#13;determination of where assets and liabilities fall within this hierarchy is based upon the lowest level of input that is significant&#13;to the fair value measurement. During the three months ended March 31, 2018 there were no reclassifications in financial assets&#13;or liabilities between Level 1, 2 or 3 categories.&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt/12pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0; background-color: white"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0; text-indent: 0.5in"&gt;The following is a listing of Solitario&amp;#8217;s&#13;financial assets and liabilities required to be measured at fair value on a recurring basis and where they are classified within&#13;the hierarchy as of March 31, 2018:&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;table cellspacing="0" cellpadding="0" style="font: 10pt Times New Roman, Times, Serif; width: 100%; border-collapse: collapse"&gt;&#13;&lt;tr style="vertical-align: bottom"&gt;&#13;    &lt;td style="width: 48%; layout-grid-mode: line; text-align: justify"&gt;(in thousands)&lt;/td&gt;&#13;    &lt;td style="width: 13%; border-bottom: Black 1pt solid; padding-right: 6pt; layout-grid-mode: line; text-align: right"&gt;Level 1&amp;#160;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="width: 14%; border-bottom: Black 1pt solid; padding-right: 8.25pt; layout-grid-mode: line; text-align: right"&gt;Level 2&amp;#160;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="width: 12%; border-bottom: Black 1pt solid; padding-right: 3pt; layout-grid-mode: line; text-align: right"&gt;Level 3&lt;/td&gt;&#13;    &lt;td style="width: 13%; border-bottom: Black 1pt solid; padding-right: 5.25pt; layout-grid-mode: line; text-align: right"&gt;Total&amp;#160;&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: bottom"&gt;&#13;    &lt;td style="layout-grid-mode: line"&gt;&lt;b&gt;Assets&lt;/b&gt;&lt;/td&gt;&#13;    &lt;td style="padding-right: 6pt; layout-grid-mode: line; text-align: right"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="padding-right: 8.25pt; layout-grid-mode: line; text-align: right"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="padding-right: 3pt; layout-grid-mode: line; text-align: right"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="padding-right: 5.25pt; layout-grid-mode: line; text-align: right"&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: bottom"&gt;&#13;    &lt;td style="layout-grid-mode: line"&gt;&amp;#160;&amp;#160;Marketable equity securities&lt;/td&gt;&#13;    &lt;td style="padding-right: 6pt; layout-grid-mode: line; text-align: right"&gt;$&amp;#160;&amp;#160;2,202&amp;#160;&lt;/td&gt;&#13;    &lt;td style="padding-right: 8.25pt; layout-grid-mode: line; text-align: right"&gt;$&amp;#160;&amp;#160;&amp;#160;&amp;#160;&amp;#160;&amp;#160;-&amp;#160;&amp;#160;&amp;#160;&amp;#160;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="padding-right: 3pt; padding-left: 0.5in; layout-grid-mode: line; text-align: right; text-indent: -0.25in"&gt;$&lt;font style="font: 7pt Times New Roman, Times, Serif"&gt;&amp;#160;&amp;#160;&amp;#160;&amp;#160;&amp;#160;&amp;#160;&amp;#160;&amp;#160; &lt;/font&gt;-&amp;#160;&amp;#160;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="padding-right: 5.25pt; layout-grid-mode: line; text-align: right"&gt;$&amp;#160;&amp;#160;2,202&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: bottom"&gt;&#13;    &lt;td style="layout-grid-mode: line"&gt;&amp;#160;&amp;#160;United States Treasury securities&lt;/td&gt;&#13;    &lt;td style="padding-right: 6pt; layout-grid-mode: line; text-align: right"&gt;9,976&amp;#160;&lt;/td&gt;&#13;    &lt;td style="padding-right: 8.25pt; layout-grid-mode: line; text-align: right"&gt;-&amp;#160;&amp;#160;&amp;#160;&amp;#160;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="padding-right: 3pt; layout-grid-mode: line; text-align: right"&gt;-&amp;#160;&amp;#160;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="padding-right: 5.25pt; layout-grid-mode: line; text-align: right"&gt;9,976&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: bottom"&gt;&#13;    &lt;td style="layout-grid-mode: line"&gt;&amp;#160;&amp;#160;Bank Certificates of Deposit&lt;/td&gt;&#13;    &lt;td style="padding-right: 6pt; layout-grid-mode: line; text-align: right"&gt;1,247&amp;#160;&lt;/td&gt;&#13;    &lt;td style="padding-right: 8.25pt; layout-grid-mode: line; text-align: right"&gt;-&amp;#160;&amp;#160;&amp;#160;&amp;#160;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="padding-right: 3pt; layout-grid-mode: line; text-align: right"&gt;-&amp;#160;&amp;#160;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="padding-right: 5.25pt; layout-grid-mode: line; text-align: right"&gt;1,247&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;/table&gt;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0; text-indent: 0.5in"&gt;The following is a listing of Solitario&amp;#8217;s&#13;financial assets and liabilities required to be measured at fair value on a recurring basis and where they are classified within&#13;the hierarchy as of December 31, 2017:&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;table cellspacing="0" cellpadding="0" style="font: 10pt Times New Roman, Times, Serif; width: 100%; border-collapse: collapse"&gt;&#13;&lt;tr style="vertical-align: bottom"&gt;&#13;    &lt;td style="width: 48%; layout-grid-mode: line; text-align: justify"&gt;(in thousands)&lt;/td&gt;&#13;    &lt;td style="width: 13%; border-bottom: Black 1pt solid; padding-right: 6pt; layout-grid-mode: line; text-align: center"&gt;Level 1&lt;/td&gt;&#13;    &lt;td style="width: 14%; border-bottom: Black 1pt solid; padding-right: 8.25pt; layout-grid-mode: line; text-align: center"&gt;Level 2&lt;/td&gt;&#13;    &lt;td style="width: 12%; border-bottom: Black 1pt solid; padding-right: 3pt; layout-grid-mode: line; text-align: center"&gt;Level 3&lt;/td&gt;&#13;    &lt;td style="width: 13%; border-bottom: Black 1pt solid; padding-right: 5.25pt; layout-grid-mode: line; text-align: center"&gt;Total&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: bottom"&gt;&#13;    &lt;td style="layout-grid-mode: line"&gt;&lt;b&gt;Assets&lt;/b&gt;&lt;/td&gt;&#13;    &lt;td style="padding-right: 6pt; layout-grid-mode: line; text-align: right"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="padding-right: 8.25pt; layout-grid-mode: line; text-align: right"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="padding-right: 3pt; layout-grid-mode: line; text-align: right"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="padding-right: 5.25pt; layout-grid-mode: line; text-align: right"&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: bottom"&gt;&#13;    &lt;td style="layout-grid-mode: line"&gt;&amp;#160;&amp;#160;Marketable equity securities&lt;/td&gt;&#13;    &lt;td style="padding-right: 6pt; layout-grid-mode: line; text-align: right"&gt;$2,643&amp;#160;&lt;/td&gt;&#13;    &lt;td style="padding-right: 8.25pt; layout-grid-mode: line; text-align: right"&gt;$&amp;#160;&amp;#160;&amp;#160;-&amp;#160;&amp;#160;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="padding-right: 3pt; layout-grid-mode: line; text-align: right"&gt;$&amp;#160;&amp;#160;-&amp;#160;&amp;#160;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="padding-right: 5.25pt; layout-grid-mode: line; text-align: right"&gt;$2,643&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: bottom"&gt;&#13;    &lt;td style="layout-grid-mode: line"&gt;&amp;#160;&amp;#160;United States Treasury securities&lt;/td&gt;&#13;    &lt;td style="padding-right: 6pt; layout-grid-mode: line; text-align: right"&gt;10,395&amp;#160;&lt;/td&gt;&#13;    &lt;td style="padding-right: 3pt; layout-grid-mode: line; text-align: right"&gt;-&amp;#160;&amp;#160;&amp;#160;&amp;#160;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="padding-right: 3pt; layout-grid-mode: line; text-align: right"&gt;-&amp;#160;&amp;#160;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="padding-right: 5.25pt; layout-grid-mode: line; text-align: right"&gt;10,395&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: bottom"&gt;&#13;    &lt;td style="layout-grid-mode: line"&gt;&amp;#160;&amp;#160;Bank Certificates of Deposit&lt;/td&gt;&#13;    &lt;td style="padding-right: 6pt; layout-grid-mode: line; text-align: right"&gt;1,247&amp;#160;&lt;/td&gt;&#13;    &lt;td style="padding-right: 3pt; layout-grid-mode: line; text-align: right"&gt;-&amp;#160;&amp;#160;&amp;#160;&amp;#160;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="padding-right: 3pt; layout-grid-mode: line; text-align: right"&gt;-&amp;#160;&amp;#160;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="padding-right: 5.25pt; layout-grid-mode: line; text-align: right"&gt;1,247&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;/table&gt;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&#13;&#13;&lt;p style="margin: 0pt"&gt;&lt;/p&gt;</us-gaap:FairValueDisclosuresTextBlock>
    <us-gaap:FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTableTextBlock contextRef="From2018-01-01to2018-03-31">&lt;table cellspacing="0" cellpadding="0" style="font: 10pt Times New Roman, Times, Serif; width: 100%; border-collapse: collapse"&gt;&#13;&lt;tr style="vertical-align: bottom"&gt;&#13;    &lt;td style="width: 48%; layout-grid-mode: line; text-align: justify"&gt;(in thousands)&lt;/td&gt;&#13;    &lt;td style="width: 13%; border-bottom: Black 1pt solid; padding-right: 6pt; layout-grid-mode: line; text-align: right"&gt;Level 1&amp;#160;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="width: 14%; border-bottom: Black 1pt solid; padding-right: 8.25pt; layout-grid-mode: line; text-align: right"&gt;Level 2&amp;#160;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="width: 12%; border-bottom: Black 1pt solid; padding-right: 3pt; layout-grid-mode: line; text-align: right"&gt;Level 3&lt;/td&gt;&#13;    &lt;td style="width: 13%; border-bottom: Black 1pt solid; padding-right: 5.25pt; layout-grid-mode: line; text-align: right"&gt;Total&amp;#160;&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: bottom"&gt;&#13;    &lt;td style="layout-grid-mode: line"&gt;&lt;b&gt;Assets&lt;/b&gt;&lt;/td&gt;&#13;    &lt;td style="padding-right: 6pt; layout-grid-mode: line; text-align: right"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="padding-right: 8.25pt; layout-grid-mode: line; text-align: right"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="padding-right: 3pt; layout-grid-mode: line; text-align: right"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="padding-right: 5.25pt; layout-grid-mode: line; text-align: right"&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: bottom"&gt;&#13;    &lt;td style="layout-grid-mode: line"&gt;&amp;#160;&amp;#160;Marketable equity securities&lt;/td&gt;&#13;    &lt;td style="padding-right: 6pt; layout-grid-mode: line; text-align: right"&gt;$&amp;#160;&amp;#160;2,202&amp;#160;&lt;/td&gt;&#13;    &lt;td style="padding-right: 8.25pt; layout-grid-mode: line; text-align: right"&gt;$&amp;#160;&amp;#160;&amp;#160;&amp;#160;&amp;#160;&amp;#160;-&amp;#160;&amp;#160;&amp;#160;&amp;#160;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="padding-right: 3pt; padding-left: 0.5in; layout-grid-mode: line; text-align: right; text-indent: -0.25in"&gt;$&lt;font style="font: 7pt Times New Roman, Times, Serif"&gt;&amp;#160;&amp;#160;&amp;#160;&amp;#160;&amp;#160;&amp;#160;&amp;#160;&amp;#160; &lt;/font&gt;-&amp;#160;&amp;#160;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="padding-right: 5.25pt; layout-grid-mode: line; text-align: right"&gt;$&amp;#160;&amp;#160;2,202&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: bottom"&gt;&#13;    &lt;td style="layout-grid-mode: line"&gt;&amp;#160;&amp;#160;United States Treasury securities&lt;/td&gt;&#13;    &lt;td style="padding-right: 6pt; layout-grid-mode: line; text-align: right"&gt;9,976&amp;#160;&lt;/td&gt;&#13;    &lt;td style="padding-right: 8.25pt; layout-grid-mode: line; text-align: right"&gt;-&amp;#160;&amp;#160;&amp;#160;&amp;#160;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="padding-right: 3pt; layout-grid-mode: line; text-align: right"&gt;-&amp;#160;&amp;#160;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="padding-right: 5.25pt; layout-grid-mode: line; text-align: right"&gt;9,976&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: bottom"&gt;&#13;    &lt;td style="layout-grid-mode: line"&gt;&amp;#160;&amp;#160;Bank Certificates of Deposit&lt;/td&gt;&#13;    &lt;td style="padding-right: 6pt; layout-grid-mode: line; text-align: right"&gt;1,247&amp;#160;&lt;/td&gt;&#13;    &lt;td style="padding-right: 8.25pt; layout-grid-mode: line; text-align: right"&gt;-&amp;#160;&amp;#160;&amp;#160;&amp;#160;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="padding-right: 3pt; layout-grid-mode: line; text-align: right"&gt;-&amp;#160;&amp;#160;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="padding-right: 5.25pt; layout-grid-mode: line; text-align: right"&gt;1,247&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;/table&gt;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0; text-indent: 0.5in"&gt;The following is a listing of Solitario&amp;#8217;s&#13;financial assets and liabilities required to be measured at fair value on a recurring basis and where they are classified within&#13;the hierarchy as of December 31, 2017:&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;table cellspacing="0" cellpadding="0" style="font: 10pt Times New Roman, Times, Serif; width: 100%; border-collapse: collapse"&gt;&#13;&lt;tr style="vertical-align: bottom"&gt;&#13;    &lt;td style="width: 48%; layout-grid-mode: line; text-align: justify"&gt;(in thousands)&lt;/td&gt;&#13;    &lt;td style="width: 13%; border-bottom: Black 1pt solid; padding-right: 6pt; layout-grid-mode: line; text-align: center"&gt;Level 1&lt;/td&gt;&#13;    &lt;td style="width: 14%; border-bottom: Black 1pt solid; padding-right: 8.25pt; layout-grid-mode: line; text-align: center"&gt;Level 2&lt;/td&gt;&#13;    &lt;td style="width: 12%; border-bottom: Black 1pt solid; padding-right: 3pt; layout-grid-mode: line; text-align: center"&gt;Level 3&lt;/td&gt;&#13;    &lt;td style="width: 13%; border-bottom: Black 1pt solid; padding-right: 5.25pt; layout-grid-mode: line; text-align: center"&gt;Total&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: bottom"&gt;&#13;    &lt;td style="layout-grid-mode: line"&gt;&lt;b&gt;Assets&lt;/b&gt;&lt;/td&gt;&#13;    &lt;td style="padding-right: 6pt; layout-grid-mode: line; text-align: right"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="padding-right: 8.25pt; layout-grid-mode: line; text-align: right"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="padding-right: 3pt; layout-grid-mode: line; text-align: right"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="padding-right: 5.25pt; layout-grid-mode: line; text-align: right"&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: bottom"&gt;&#13;    &lt;td style="layout-grid-mode: line"&gt;&amp;#160;&amp;#160;Marketable equity securities&lt;/td&gt;&#13;    &lt;td style="padding-right: 6pt; layout-grid-mode: line; text-align: right"&gt;$2,643&amp;#160;&lt;/td&gt;&#13;    &lt;td style="padding-right: 8.25pt; layout-grid-mode: line; text-align: right"&gt;$&amp;#160;&amp;#160;&amp;#160;-&amp;#160;&amp;#160;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="padding-right: 3pt; layout-grid-mode: line; text-align: right"&gt;$&amp;#160;&amp;#160;-&amp;#160;&amp;#160;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="padding-right: 5.25pt; layout-grid-mode: line; text-align: right"&gt;$2,643&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: bottom"&gt;&#13;    &lt;td style="layout-grid-mode: line"&gt;&amp;#160;&amp;#160;United States Treasury securities&lt;/td&gt;&#13;    &lt;td style="padding-right: 6pt; layout-grid-mode: line; text-align: right"&gt;10,395&amp;#160;&lt;/td&gt;&#13;    &lt;td style="padding-right: 3pt; layout-grid-mode: line; 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    <XPL:StockRepurchasedAndRetiredDuringPeriodValue2 contextRef="From2017-01-01to2017-03-31" unitRef="USD" decimals="-3">6000</XPL:StockRepurchasedAndRetiredDuringPeriodValue2>
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    <us-gaap:PaymentsToAcquireAvailableForSaleSecurities contextRef="From2017-01-01to2017-03-31" unitRef="USD" decimals="-3">477000</us-gaap:PaymentsToAcquireAvailableForSaleSecurities>
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    <XPL:ScheduleOfStockholdersEquityTsbleTextBlockTableTextBlock contextRef="From2018-01-01to2018-03-31">&lt;table cellspacing="0" cellpadding="0" style="font: 10pt Times New Roman, Times, Serif; width: 100%; border-collapse: collapse"&gt;&#13;&lt;tr&gt;&#13;    &lt;td style="vertical-align: top; width: 32%; padding-right: 5.4pt; padding-left: 5.4pt; font-family: Courier New, Courier, Monospace"&gt;&lt;font style="font-family: Times New Roman, Times, Serif"&gt;(in thousands, except&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="vertical-align: bottom; width: 10%; padding-right: -5.4pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: center"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="vertical-align: bottom; width: 9%; padding-right: 5.4pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: center"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="vertical-align: bottom; width: 11%; padding-right: 5.4pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: center"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="vertical-align: bottom; width: 12%; padding-right: 5.4pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: center"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="vertical-align: bottom; width: 14%; padding-right: -5.4pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: center"&gt;Accumulated&lt;/td&gt;&#13;    &lt;td style="vertical-align: bottom; width: 12%; padding-right: -5.4pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: center"&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr&gt;&#13;    &lt;td style="vertical-align: top; padding-right: 5.4pt; padding-left: 5.4pt; layout-grid-mode: line"&gt;Share amounts)&lt;/td&gt;&#13;    &lt;td style="vertical-align: bottom; padding-right: -5.4pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: center"&gt;Common&lt;/td&gt;&#13;    &lt;td style="vertical-align: bottom; padding-right: -5.4pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: center"&gt;Common&lt;/td&gt;&#13;    &lt;td style="vertical-align: bottom; padding-right: -5.4pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: center; text-indent: -5.4pt"&gt;Additional&lt;/td&gt;&#13;    &lt;td style="vertical-align: bottom; padding-right: -5.4pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: center"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="vertical-align: bottom; padding-right: -5.4pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: center"&gt;Other&lt;/td&gt;&#13;    &lt;td style="vertical-align: bottom; padding-right: -5.4pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: center"&gt;Total&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr&gt;&#13;    &lt;td style="vertical-align: top; padding-right: 5.4pt; padding-left: 5.4pt; layout-grid-mode: line"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="vertical-align: bottom; padding-right: -5.4pt; padding-left: 5.4pt; text-align: center; font-family: CG Times (W1)"&gt;&lt;font style="font-family: Times New Roman, Times, Serif"&gt;Stock&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="vertical-align: bottom; padding-right: -5.4pt; padding-left: 5.4pt; text-align: center; font-family: CG Times (W1)"&gt;&lt;font style="font-family: Times New Roman, Times, Serif"&gt;Stock&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="vertical-align: bottom; padding-right: -5.4pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: center; text-indent: -5.4pt"&gt;Paid-in&lt;/td&gt;&#13;    &lt;td style="vertical-align: bottom; padding-right: -5.4pt; padding-left: 5.4pt; text-align: center; font-family: CG Times (W1)"&gt;&lt;font style="font-family: Times New Roman, Times, Serif"&gt;Accumulated&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="vertical-align: bottom; padding-right: -5.4pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: center"&gt;Comprehensive&lt;/td&gt;&#13;    &lt;td style="vertical-align: bottom; padding-right: -5.4pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: center"&gt;Shareholders&amp;#8217;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr&gt;&#13;    &lt;td style="vertical-align: top; padding-right: 5.4pt; padding-left: 5.4pt; layout-grid-mode: line"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="vertical-align: bottom; border-bottom: Black 1pt solid; padding-right: -5.4pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: center"&gt;Shares&lt;/td&gt;&#13;    &lt;td style="vertical-align: bottom; border-bottom: Black 1pt solid; padding-right: -5.4pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: center"&gt;Amount&lt;/td&gt;&#13;    &lt;td style="vertical-align: bottom; border-bottom: Black 1pt solid; padding-right: -5.4pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: center; text-indent: -5.4pt"&gt;Capital&lt;/td&gt;&#13;    &lt;td style="vertical-align: bottom; border-bottom: Black 1pt solid; padding-right: -5.4pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: center"&gt;Deficit&lt;/td&gt;&#13;    &lt;td style="vertical-align: bottom; border-bottom: Black 1pt solid; padding-right: -5.4pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: center"&gt;Income&lt;/td&gt;&#13;    &lt;td style="vertical-align: bottom; border-bottom: Black 1pt solid; padding-right: -5.4pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: center"&gt;Equity&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: bottom"&gt;&#13;    &lt;td style="padding-right: 5.4pt; padding-left: 5.4pt; layout-grid-mode: line"&gt;&lt;b&gt;Balance at December 31, 2017&lt;/b&gt;&lt;/td&gt;&#13;    &lt;td style="padding-right: 5.4pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: right"&gt;&lt;b&gt;58,434,566&lt;/b&gt;&lt;/td&gt;&#13;    &lt;td style="padding-right: -0.75pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: right"&gt;&lt;b&gt;584&amp;#160;&lt;/b&gt;&lt;/td&gt;&#13;    &lt;td style="padding-right: 5.4pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: right"&gt;&lt;b&gt;$69,312&amp;#160;&lt;/b&gt;&lt;/td&gt;&#13;    &lt;td style="padding-right: 3.75pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: right"&gt;&lt;b&gt;$(40,343)&lt;/b&gt;&lt;/td&gt;&#13;    &lt;td style="padding-right: 3.75pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: right"&gt;&lt;b&gt;$&amp;#160;&amp;#160;&amp;#160;576&amp;#160;&lt;/b&gt;&lt;/td&gt;&#13;    &lt;td style="padding-right: 2.15pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: right"&gt;&lt;b&gt;$30,129&amp;#160;&lt;/b&gt;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr&gt;&#13;    &lt;td style="vertical-align: top; padding-right: 5.4pt; padding-left: 5.4pt"&gt;&#13;        &lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0"&gt;Cumulative-effect adjustment&lt;/p&gt;&#13;        &lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0"&gt;change in accounting principle&lt;/p&gt;&lt;/td&gt;&#13;    &lt;td style="vertical-align: bottom; border-bottom: Black 1pt solid; padding-right: 5.4pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: right"&gt;&lt;b&gt;- &amp;#160;&amp;#160;&lt;/b&gt;&lt;/td&gt;&#13;    &lt;td style="vertical-align: bottom; border-bottom: Black 1pt solid; padding-right: -0.75pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: right"&gt;&lt;b&gt;- &amp;#160;&amp;#160;&lt;/b&gt;&lt;/td&gt;&#13;    &lt;td style="vertical-align: bottom; border-bottom: Black 1pt solid; padding-right: 5.4pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: right"&gt;&lt;b&gt;- &amp;#160;&amp;#160;&lt;/b&gt;&lt;/td&gt;&#13;    &lt;td style="vertical-align: bottom; border-bottom: Black 1pt solid; padding-right: 3.75pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: right"&gt;576&amp;#160;&lt;/td&gt;&#13;    &lt;td style="vertical-align: bottom; border-bottom: Black 1pt solid; padding-right: 3.75pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: right"&gt;(576)&lt;/td&gt;&#13;    &lt;td style="vertical-align: bottom; border-bottom: Black 1pt solid; padding-right: 3.75pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: right"&gt;&lt;b&gt;-&amp;#160;&amp;#160;&lt;/b&gt;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr&gt;&#13;    &lt;td style="vertical-align: top; padding-right: 5.4pt; padding-left: 5.4pt; layout-grid-mode: line"&gt;&lt;b&gt;Adjusted balance January 1, 2018&lt;/b&gt;&lt;/td&gt;&#13;    &lt;td style="vertical-align: bottom; padding-right: 5.4pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: right"&gt;&lt;b&gt;58,434,566&lt;/b&gt;&lt;/td&gt;&#13;    &lt;td style="vertical-align: bottom; padding-right: -0.75pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: right"&gt;&lt;b&gt;584&lt;/b&gt;&lt;/td&gt;&#13;    &lt;td style="vertical-align: bottom; padding-right: 5.4pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: right"&gt;&lt;b&gt;69,312&amp;#160;&lt;/b&gt;&lt;/td&gt;&#13;    &lt;td style="vertical-align: bottom; padding-right: 3.75pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: right"&gt;&lt;b&gt;(39,767)&lt;/b&gt;&lt;/td&gt;&#13;    &lt;td style="vertical-align: bottom; padding-right: 3.75pt; padding-left: 26.2pt; layout-grid-mode: line; text-align: right"&gt;&lt;b&gt;- &amp;#160;&amp;#160;&lt;/b&gt;&lt;/td&gt;&#13;    &lt;td style="vertical-align: bottom; padding-right: 2.15pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: right"&gt;&lt;b&gt;30,129&amp;#160;&lt;/b&gt;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr&gt;&#13;    &lt;td style="vertical-align: top; padding-right: 5.4pt; padding-left: 5.4pt; layout-grid-mode: line"&gt;Stock option expense&lt;/td&gt;&#13;    &lt;td style="vertical-align: bottom; padding-right: 5.4pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: right"&gt;&lt;b&gt;- &amp;#160;&amp;#160;&lt;/b&gt;&lt;/td&gt;&#13;    &lt;td style="vertical-align: bottom; padding-right: -0.75pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: right"&gt;&lt;b&gt;- &amp;#160;&amp;#160;&lt;/b&gt;&lt;/td&gt;&#13;    &lt;td style="vertical-align: bottom; padding-right: 5.4pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: right"&gt;10&lt;b&gt;&amp;#160;&lt;/b&gt;&lt;/td&gt;&#13;    &lt;td style="vertical-align: bottom; padding-right: 3.75pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: right"&gt;&lt;b&gt;- &amp;#160;&amp;#160;&lt;/b&gt;&lt;/td&gt;&#13;    &lt;td style="vertical-align: bottom; padding-right: 3.75pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: right"&gt;&lt;b&gt;- &amp;#160;&amp;#160;&lt;/b&gt;&lt;/td&gt;&#13;    &lt;td style="vertical-align: bottom; padding-right: 2.15pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: right"&gt;10&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr&gt;&#13;    &lt;td style="vertical-align: top; padding-right: 5.4pt; padding-left: 5.4pt; layout-grid-mode: line"&gt;Purchase of shares for cancellation&lt;/td&gt;&#13;    &lt;td style="vertical-align: bottom; padding-right: 5.4pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: right"&gt;(52,614)&lt;/td&gt;&#13;    &lt;td style="vertical-align: bottom; padding-right: -0.75pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: right"&gt;-&amp;#160;&amp;#160;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="vertical-align: bottom; padding-right: 5.4pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: right"&gt;(26)&lt;/td&gt;&#13;    &lt;td style="vertical-align: bottom; padding-right: 3.75pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: right"&gt;-&amp;#160;&amp;#160;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="vertical-align: bottom; padding-right: 3.75pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: right"&gt;-&amp;#160;&amp;#160;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="vertical-align: bottom; padding-right: 2.15pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: right"&gt;(26)&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr&gt;&#13;    &lt;td style="vertical-align: top; padding-right: 5.4pt; padding-left: 5.4pt; layout-grid-mode: line"&gt;Net loss&lt;/td&gt;&#13;    &lt;td style="vertical-align: bottom; padding-right: 5.4pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: right"&gt;-&amp;#160;&amp;#160;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="vertical-align: bottom; padding-right: -0.75pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: right"&gt;-&amp;#160;&amp;#160;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="vertical-align: bottom; padding-right: 5.4pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: right"&gt;-&amp;#160;&amp;#160;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="vertical-align: bottom; padding-right: 3.75pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: right"&gt;(1,004)&lt;/td&gt;&#13;    &lt;td style="vertical-align: bottom; padding-right: 3.75pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: right"&gt;-&amp;#160;&amp;#160;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="vertical-align: bottom; padding-right: 2.15pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: right"&gt;(1,004)&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr&gt;&#13;    &lt;td style="vertical-align: top; padding-right: 5.4pt; padding-left: 5.4pt; layout-grid-mode: line"&gt;&lt;b&gt;Balance at March 31, 2017 &lt;/b&gt;&lt;/td&gt;&#13;    &lt;td style="vertical-align: bottom; border-top: Black 1pt solid; border-bottom: Black 1pt solid; padding-right: 5.4pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: right"&gt;&lt;b&gt;58,381,952&lt;/b&gt;&lt;/td&gt;&#13;    &lt;td style="vertical-align: bottom; border-top: Black 1pt solid; border-bottom: Black 1pt solid; padding-right: -0.75pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: right"&gt;&lt;b&gt;$584&lt;/b&gt;&lt;/td&gt;&#13;    &lt;td style="vertical-align: bottom; border-top: Black 1pt solid; border-bottom: Black 1pt solid; padding-right: 5.4pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: right"&gt;&lt;b&gt;$69,296&amp;#160;&lt;/b&gt;&lt;/td&gt;&#13;    &lt;td style="vertical-align: bottom; border-top: Black 1pt solid; border-bottom: Black 1pt solid; padding-right: 3.75pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: right"&gt;&lt;b&gt;$(40,771)&lt;/b&gt;&lt;/td&gt;&#13;    &lt;td style="vertical-align: bottom; border-top: Black 1pt solid; border-bottom: Black 1pt solid; padding-right: 3.75pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: right"&gt;&lt;b&gt;$&amp;#160;&amp;#160;&amp;#160;&amp;#160;-&amp;#160;&amp;#160;&amp;#160;&amp;#160;&amp;#160;&lt;/b&gt;&lt;/td&gt;&#13;    &lt;td style="vertical-align: bottom; border-top: Black 1pt solid; border-bottom: Black 1pt solid; padding-right: 2.15pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: right"&gt;&lt;b&gt;$29,109&amp;#160;&lt;/b&gt;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;/table&gt;</XPL:ScheduleOfStockholdersEquityTsbleTextBlockTableTextBlock>
    <XPL:BalanceStockholdersEquiityBeginning contextRef="AsOf2017-12-31_us-gaap_CommonStockMember698075781" unitRef="USD" decimals="-3">584000</XPL:BalanceStockholdersEquiityBeginning>
    <XPL:BalanceStockholdersEquiityBeginning contextRef="AsOf2017-12-31_us-gaap_AdditionalPaidInCapitalMember698076015" unitRef="USD" decimals="-3">69312000</XPL:BalanceStockholdersEquiityBeginning>
    <XPL:BalanceStockholdersEquiityBeginning contextRef="AsOf2017-12-31_custom_AccumulatedDeficitMember" unitRef="USD" decimals="-3">-39767000</XPL:BalanceStockholdersEquiityBeginning>
    <XPL:BalanceStockholdersEquiityBeginning contextRef="AsOf2017-12-31_us-gaap_AccumulatedOtherComprehensiveIncomeMember698076421" unitRef="USD" xsi:nil="true" />
    <XPL:BalanceStockholdersEquiityBeginning contextRef="AsOf2017-12-31_custom_TotalShareholdersEquityMember" unitRef="USD" decimals="-3">30129000</XPL:BalanceStockholdersEquiityBeginning>
    <XPL:BalanceStockholdersEquityEnding contextRef="AsOf2018-03-31_us-gaap_CommonStockMember698075921" unitRef="USD" decimals="-3">584000</XPL:BalanceStockholdersEquityEnding>
    <XPL:BalanceStockholdersEquityEnding contextRef="AsOf2018-03-31_us-gaap_AdditionalPaidInCapitalMember698076140" unitRef="USD" decimals="-3">69296000</XPL:BalanceStockholdersEquityEnding>
    <XPL:BalanceStockholdersEquityEnding contextRef="AsOf2018-03-31_custom_AccumulatedDeficitMember" unitRef="USD" decimals="-3">-40771000</XPL:BalanceStockholdersEquityEnding>
    <XPL:BalanceStockholdersEquityEnding contextRef="AsOf2018-03-31_us-gaap_AccumulatedOtherComprehensiveIncomeMember698076546" unitRef="USD" xsi:nil="true" />
    <XPL:BalanceStockholdersEquityEnding contextRef="AsOf2018-03-31_custom_TotalShareholdersEquityMember" unitRef="USD" decimals="-3">29109000</XPL:BalanceStockholdersEquityEnding>
    <XPL:ShareholdersEquityNoteDisclosureTextBlock contextRef="From2018-01-01to2018-03-31">&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0"&gt;&lt;b&gt;9.&amp;#160;&amp;#160;&amp;#160;&amp;#160;&amp;#160;&amp;#160;&amp;#160;&amp;#160;Shareholders&amp;#8217;&#13;Equity and Accumulated Other Comprehensive Income&lt;/b&gt;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;table cellspacing="0" cellpadding="0" style="font: 10pt Times New Roman, Times, Serif; width: 100%; border-collapse: collapse"&gt;&#13;&lt;tr&gt;&#13;    &lt;td style="vertical-align: top; width: 32%; padding-right: 5.4pt; padding-left: 5.4pt; font-family: Courier New, Courier, Monospace"&gt;&lt;font style="font-family: Times New Roman, Times, Serif"&gt;(in thousands, except&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="vertical-align: bottom; width: 10%; padding-right: -5.4pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: center"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="vertical-align: bottom; width: 9%; padding-right: 5.4pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: center"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="vertical-align: bottom; width: 11%; padding-right: 5.4pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: center"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="vertical-align: bottom; width: 12%; padding-right: 5.4pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: center"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="vertical-align: bottom; width: 14%; padding-right: -5.4pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: center"&gt;Accumulated&lt;/td&gt;&#13;    &lt;td style="vertical-align: bottom; width: 12%; padding-right: -5.4pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: center"&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr&gt;&#13;    &lt;td style="vertical-align: top; padding-right: 5.4pt; padding-left: 5.4pt; layout-grid-mode: line"&gt;Share amounts)&lt;/td&gt;&#13;    &lt;td style="vertical-align: bottom; padding-right: -5.4pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: center"&gt;Common&lt;/td&gt;&#13;    &lt;td style="vertical-align: bottom; padding-right: -5.4pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: center"&gt;Common&lt;/td&gt;&#13;    &lt;td style="vertical-align: bottom; padding-right: -5.4pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: center; text-indent: -5.4pt"&gt;Additional&lt;/td&gt;&#13;    &lt;td style="vertical-align: bottom; padding-right: -5.4pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: center"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="vertical-align: bottom; padding-right: -5.4pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: center"&gt;Other&lt;/td&gt;&#13;    &lt;td style="vertical-align: bottom; padding-right: -5.4pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: center"&gt;Total&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr&gt;&#13;    &lt;td style="vertical-align: top; padding-right: 5.4pt; padding-left: 5.4pt; layout-grid-mode: line"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="vertical-align: bottom; padding-right: -5.4pt; padding-left: 5.4pt; text-align: center; font-family: CG Times (W1)"&gt;&lt;font style="font-family: Times New Roman, Times, Serif"&gt;Stock&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="vertical-align: bottom; padding-right: -5.4pt; padding-left: 5.4pt; text-align: center; font-family: CG Times (W1)"&gt;&lt;font style="font-family: Times New Roman, Times, Serif"&gt;Stock&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="vertical-align: bottom; padding-right: -5.4pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: center; text-indent: -5.4pt"&gt;Paid-in&lt;/td&gt;&#13;    &lt;td style="vertical-align: bottom; padding-right: -5.4pt; padding-left: 5.4pt; text-align: center; font-family: CG Times (W1)"&gt;&lt;font style="font-family: Times New Roman, Times, Serif"&gt;Accumulated&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="vertical-align: bottom; padding-right: -5.4pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: center"&gt;Comprehensive&lt;/td&gt;&#13;    &lt;td style="vertical-align: bottom; padding-right: -5.4pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: center"&gt;Shareholders&amp;#8217;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr&gt;&#13;    &lt;td style="vertical-align: top; padding-right: 5.4pt; padding-left: 5.4pt; layout-grid-mode: line"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="vertical-align: bottom; border-bottom: Black 1pt solid; padding-right: -5.4pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: center"&gt;Shares&lt;/td&gt;&#13;    &lt;td style="vertical-align: bottom; border-bottom: Black 1pt solid; padding-right: -5.4pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: center"&gt;Amount&lt;/td&gt;&#13; 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padding-left: 5.4pt; layout-grid-mode: line; text-align: right"&gt;&lt;b&gt;58,434,566&lt;/b&gt;&lt;/td&gt;&#13;    &lt;td style="padding-right: -0.75pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: right"&gt;&lt;b&gt;584&amp;#160;&lt;/b&gt;&lt;/td&gt;&#13;    &lt;td style="padding-right: 5.4pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: right"&gt;&lt;b&gt;$69,312&amp;#160;&lt;/b&gt;&lt;/td&gt;&#13;    &lt;td style="padding-right: 3.75pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: right"&gt;&lt;b&gt;$(40,343)&lt;/b&gt;&lt;/td&gt;&#13;    &lt;td style="padding-right: 3.75pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: right"&gt;&lt;b&gt;$&amp;#160;&amp;#160;&amp;#160;576&amp;#160;&lt;/b&gt;&lt;/td&gt;&#13;    &lt;td style="padding-right: 2.15pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: right"&gt;&lt;b&gt;$30,129&amp;#160;&lt;/b&gt;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr&gt;&#13;    &lt;td style="vertical-align: top; padding-right: 5.4pt; padding-left: 5.4pt"&gt;&#13;        &lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0"&gt;Cumulative-effect adjustment&lt;/p&gt;&#13;        &lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0"&gt;change in accounting principle&lt;/p&gt;&lt;/td&gt;&#13;    &lt;td style="vertical-align: bottom; border-bottom: Black 1pt solid; padding-right: 5.4pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: right"&gt;&lt;b&gt;- &amp;#160;&amp;#160;&lt;/b&gt;&lt;/td&gt;&#13;    &lt;td style="vertical-align: bottom; border-bottom: Black 1pt solid; padding-right: -0.75pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: right"&gt;&lt;b&gt;- &amp;#160;&amp;#160;&lt;/b&gt;&lt;/td&gt;&#13;    &lt;td style="vertical-align: bottom; border-bottom: Black 1pt solid; padding-right: 5.4pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: right"&gt;&lt;b&gt;- &amp;#160;&amp;#160;&lt;/b&gt;&lt;/td&gt;&#13;    &lt;td style="vertical-align: bottom; border-bottom: Black 1pt solid; padding-right: 3.75pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: right"&gt;576&amp;#160;&lt;/td&gt;&#13;    &lt;td style="vertical-align: bottom; border-bottom: Black 1pt solid; padding-right: 3.75pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: right"&gt;(576)&lt;/td&gt;&#13;    &lt;td style="vertical-align: bottom; border-bottom: Black 1pt solid; padding-right: 3.75pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: right"&gt;&lt;b&gt;-&amp;#160;&amp;#160;&lt;/b&gt;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr&gt;&#13;    &lt;td style="vertical-align: top; padding-right: 5.4pt; padding-left: 5.4pt; layout-grid-mode: line"&gt;&lt;b&gt;Adjusted balance January 1, 2018&lt;/b&gt;&lt;/td&gt;&#13;    &lt;td style="vertical-align: bottom; padding-right: 5.4pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: right"&gt;&lt;b&gt;58,434,566&lt;/b&gt;&lt;/td&gt;&#13;    &lt;td style="vertical-align: bottom; padding-right: -0.75pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: right"&gt;&lt;b&gt;584&lt;/b&gt;&lt;/td&gt;&#13;    &lt;td style="vertical-align: bottom; padding-right: 5.4pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: right"&gt;&lt;b&gt;69,312&amp;#160;&lt;/b&gt;&lt;/td&gt;&#13;    &lt;td style="vertical-align: bottom; padding-right: 3.75pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: right"&gt;&lt;b&gt;(39,767)&lt;/b&gt;&lt;/td&gt;&#13;    &lt;td style="vertical-align: bottom; padding-right: 3.75pt; padding-left: 26.2pt; layout-grid-mode: line; text-align: right"&gt;&lt;b&gt;- &amp;#160;&amp;#160;&lt;/b&gt;&lt;/td&gt;&#13;    &lt;td style="vertical-align: bottom; padding-right: 2.15pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: right"&gt;&lt;b&gt;30,129&amp;#160;&lt;/b&gt;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr&gt;&#13;    &lt;td style="vertical-align: top; padding-right: 5.4pt; padding-left: 5.4pt; layout-grid-mode: line"&gt;Stock option expense&lt;/td&gt;&#13;    &lt;td style="vertical-align: bottom; padding-right: 5.4pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: right"&gt;&lt;b&gt;- &amp;#160;&amp;#160;&lt;/b&gt;&lt;/td&gt;&#13;    &lt;td style="vertical-align: bottom; padding-right: -0.75pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: right"&gt;&lt;b&gt;- &amp;#160;&amp;#160;&lt;/b&gt;&lt;/td&gt;&#13;    &lt;td style="vertical-align: bottom; padding-right: 5.4pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: right"&gt;10&lt;b&gt;&amp;#160;&lt;/b&gt;&lt;/td&gt;&#13;    &lt;td style="vertical-align: bottom; padding-right: 3.75pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: right"&gt;&lt;b&gt;- &amp;#160;&amp;#160;&lt;/b&gt;&lt;/td&gt;&#13;    &lt;td style="vertical-align: bottom; padding-right: 3.75pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: right"&gt;&lt;b&gt;- &amp;#160;&amp;#160;&lt;/b&gt;&lt;/td&gt;&#13;    &lt;td style="vertical-align: bottom; padding-right: 2.15pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: right"&gt;10&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr&gt;&#13;    &lt;td style="vertical-align: top; padding-right: 5.4pt; padding-left: 5.4pt; layout-grid-mode: line"&gt;Purchase of shares for cancellation&lt;/td&gt;&#13;    &lt;td style="vertical-align: bottom; padding-right: 5.4pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: right"&gt;(52,614)&lt;/td&gt;&#13;    &lt;td style="vertical-align: bottom; padding-right: -0.75pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: right"&gt;-&amp;#160;&amp;#160;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="vertical-align: bottom; padding-right: 5.4pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: right"&gt;(26)&lt;/td&gt;&#13;    &lt;td style="vertical-align: bottom; padding-right: 3.75pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: right"&gt;-&amp;#160;&amp;#160;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="vertical-align: bottom; padding-right: 3.75pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: right"&gt;-&amp;#160;&amp;#160;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="vertical-align: bottom; padding-right: 2.15pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: right"&gt;(26)&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr&gt;&#13;    &lt;td style="vertical-align: top; padding-right: 5.4pt; padding-left: 5.4pt; layout-grid-mode: line"&gt;Net loss&lt;/td&gt;&#13;    &lt;td style="vertical-align: bottom; padding-right: 5.4pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: right"&gt;-&amp;#160;&amp;#160;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="vertical-align: bottom; padding-right: -0.75pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: right"&gt;-&amp;#160;&amp;#160;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="vertical-align: bottom; padding-right: 5.4pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: right"&gt;-&amp;#160;&amp;#160;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="vertical-align: bottom; padding-right: 3.75pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: right"&gt;(1,004)&lt;/td&gt;&#13;    &lt;td style="vertical-align: bottom; padding-right: 3.75pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: right"&gt;-&amp;#160;&amp;#160;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="vertical-align: bottom; padding-right: 2.15pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: right"&gt;(1,004)&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr&gt;&#13;    &lt;td style="vertical-align: top; padding-right: 5.4pt; padding-left: 5.4pt; layout-grid-mode: line"&gt;&lt;b&gt;Balance at March 31, 2018 &lt;/b&gt;&lt;/td&gt;&#13;    &lt;td style="vertical-align: bottom; border-top: Black 1pt solid; border-bottom: Black 1pt solid; padding-right: 5.4pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: right"&gt;&lt;b&gt;58,381,952&lt;/b&gt;&lt;/td&gt;&#13;    &lt;td style="vertical-align: bottom; border-top: Black 1pt solid; border-bottom: Black 1pt solid; padding-right: -0.75pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: right"&gt;&lt;b&gt;$584&lt;/b&gt;&lt;/td&gt;&#13;    &lt;td style="vertical-align: bottom; border-top: Black 1pt solid; border-bottom: Black 1pt solid; padding-right: 5.4pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: right"&gt;&lt;b&gt;$69,296&amp;#160;&lt;/b&gt;&lt;/td&gt;&#13;    &lt;td style="vertical-align: bottom; border-top: Black 1pt solid; border-bottom: Black 1pt solid; padding-right: 3.75pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: right"&gt;&lt;b&gt;$(40,771)&lt;/b&gt;&lt;/td&gt;&#13;    &lt;td style="vertical-align: bottom; border-top: Black 1pt solid; border-bottom: Black 1pt solid; padding-right: 3.75pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: right"&gt;&lt;b&gt;$&amp;#160;&amp;#160;&amp;#160;&amp;#160;-&amp;#160;&amp;#160;&amp;#160;&amp;#160;&amp;#160;&lt;/b&gt;&lt;/td&gt;&#13;    &lt;td style="vertical-align: bottom; border-top: Black 1pt solid; border-bottom: Black 1pt solid; padding-right: 2.15pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: right"&gt;&lt;b&gt;$29,109&amp;#160;&lt;/b&gt;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;/table&gt;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0; text-indent: 0.5in"&gt;Solitario adopted ASU No. 2016-01&#13;in the first quarter of 2018. Solitario recorded a cumulative-effect adjustment for the change in accounting principle to retained&#13;earnings of $576,000 related to the adoption of ASU 2016-01. In addition, Solitario eliminated its previously recorded gain on&#13;sale of marketable equity securities of $221,000 in its consolidated statement of operations for the three months ended March 31,&#13;2017 resulting in an adjusted unrealized gain on marketable equity securities of $128,000 for the three months ended March 31,&#13;2017 as a result of the adoption of ASU 2016-01. These changes increased the net loss for the three months ended March 31, 2017&#13;from $13,000 to $106,000. These changes as a result of the adoption of ASU 2016-01 were similarly reflected in the adjustment to&#13;net income for marketable equity securities in the statement of cash flows for the three months ended March 31, 2017.&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0; text-indent: 0.5in"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0"&gt;&lt;u&gt;Share Repurchase Program&lt;/u&gt;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0; text-indent: 0.5in"&gt;On October 28, 2015, Solitario&amp;#8217;s&#13;Board of Directors approved a share repurchase program that authorized Solitario to purchase up to two million shares of its outstanding&#13;common stock. During 2017, Solitario&amp;#8217;s Board of Directors extended the expiration date of the share repurchase program through&#13;December 31, 2018. During the three months ended March 31, 2018 and 2017, Solitario purchased 52,614 and 8,400 shares of Solitario&#13;common stock, respectively, for an aggregate purchase price of $26,000 and $6,000, respectively. As of March 31, 2018, Solitario&#13;has purchased a total of 720,414 shares for an aggregate purchase price of $374,000 under the share repurchase program since its&#13;inception.&lt;/p&gt;</XPL:ShareholdersEquityNoteDisclosureTextBlock>
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      <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_DocumentType" xlink:to="dei_DocumentType_lbl" xlink:type="arc" />
      <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="dei_DocumentType_lbl" xml:lang="en-US">Document Type</link:label>
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      <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_DocumentPeriodEndDate" xlink:to="dei_DocumentPeriodEndDate_lbl" xlink:type="arc" />
      <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="dei_DocumentPeriodEndDate_lbl" xml:lang="en-US">Document Period End Date</link:label>
      <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2018/dei-2018-01-31.xsd#dei_AmendmentFlag" xlink:label="dei_AmendmentFlag" />
      <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_AmendmentFlag" xlink:to="dei_AmendmentFlag_lbl" xlink:type="arc" />
      <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="dei_AmendmentFlag_lbl" xml:lang="en-US">Amendment Flag</link:label>
      <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2018/dei-2018-01-31.xsd#dei_CurrentFiscalYearEndDate" xlink:label="dei_CurrentFiscalYearEndDate" />
      <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_CurrentFiscalYearEndDate" xlink:to="dei_CurrentFiscalYearEndDate_lbl" xlink:type="arc" />
      <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="dei_CurrentFiscalYearEndDate_lbl" xml:lang="en-US">Current Fiscal Year End Date</link:label>
      <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2018/dei-2018-01-31.xsd#dei_EntityWellKnownSeasonedIssuer" xlink:label="dei_EntityWellKnownSeasonedIssuer" />
      <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_EntityWellKnownSeasonedIssuer" xlink:to="dei_EntityWellKnownSeasonedIssuer_lbl" xlink:type="arc" />
      <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="dei_EntityWellKnownSeasonedIssuer_lbl" xml:lang="en-US">Is Entity a Well-known Seasoned Issuer?</link:label>
      <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2018/dei-2018-01-31.xsd#dei_EntityVoluntaryFilers" xlink:label="dei_EntityVoluntaryFilers" />
      <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_EntityVoluntaryFilers" xlink:to="dei_EntityVoluntaryFilers_lbl" xlink:type="arc" />
      <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="dei_EntityVoluntaryFilers_lbl" xml:lang="en-US">Is Entity a Voluntary Filer?</link:label>
      <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2018/dei-2018-01-31.xsd#dei_EntityCurrentReportingStatus" xlink:label="dei_EntityCurrentReportingStatus" />
      <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_EntityCurrentReportingStatus" xlink:to="dei_EntityCurrentReportingStatus_lbl" xlink:type="arc" />
      <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="dei_EntityCurrentReportingStatus_lbl" xml:lang="en-US">Is Entity's Reporting Status Current?</link:label>
      <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2018/dei-2018-01-31.xsd#dei_EntityFilerCategory" xlink:label="dei_EntityFilerCategory" />
      <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_EntityFilerCategory" xlink:to="dei_EntityFilerCategory_lbl" xlink:type="arc" />
      <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="dei_EntityFilerCategory_lbl" xml:lang="en-US">Entity Filer Category</link:label>
      <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2018/dei-2018-01-31.xsd#dei_EntityPublicFloat" xlink:label="dei_EntityPublicFloat" />
      <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_EntityPublicFloat" xlink:to="dei_EntityPublicFloat_lbl" xlink:type="arc" />
      <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="dei_EntityPublicFloat_lbl" xml:lang="en-US">Entity Public Float</link:label>
      <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2018/dei-2018-01-31.xsd#dei_EntityCommonStockSharesOutstanding" xlink:label="dei_EntityCommonStockSharesOutstanding" />
      <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_EntityCommonStockSharesOutstanding" xlink:to="dei_EntityCommonStockSharesOutstanding_lbl" xlink:type="arc" />
      <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="dei_EntityCommonStockSharesOutstanding_lbl" xml:lang="en-US">Entity Common Stock, Shares Outstanding</link:label>
      <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2018/dei-2018-01-31.xsd#dei_DocumentFiscalPeriodFocus" xlink:label="dei_DocumentFiscalPeriodFocus" />
      <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_DocumentFiscalPeriodFocus" xlink:to="dei_DocumentFiscalPeriodFocus_lbl" xlink:type="arc" />
      <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="dei_DocumentFiscalPeriodFocus_lbl" xml:lang="en-US">Document Fiscal Period Focus</link:label>
      <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2018/dei-2018-01-31.xsd#dei_DocumentFiscalYearFocus" xlink:label="dei_DocumentFiscalYearFocus" />
      <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_DocumentFiscalYearFocus" xlink:to="dei_DocumentFiscalYearFocus_lbl" xlink:type="arc" />
      <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="dei_DocumentFiscalYearFocus_lbl" xml:lang="en-US">Document Fiscal Year Focus</link:label>
      <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_StatementOfFinancialPositionAbstract" xlink:label="us-gaap_StatementOfFinancialPositionAbstract" />
      <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_StatementOfFinancialPositionAbstract" xlink:to="us-gaap_StatementOfFinancialPositionAbstract_lbl" xlink:type="arc" />
      <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_StatementOfFinancialPositionAbstract_lbl" xml:lang="en-US">Statement of Financial Position [Abstract]</link:label>
      <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AssetsAbstract" xlink:label="us-gaap_AssetsAbstract" />
      <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AssetsAbstract" xlink:to="us-gaap_AssetsAbstract_lbl" xlink:type="arc" />
      <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_AssetsAbstract_lbl" xml:lang="en-US">Assets</link:label>
      <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AssetsCurrentAbstract" xlink:label="us-gaap_AssetsCurrentAbstract" />
      <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AssetsCurrentAbstract" xlink:to="us-gaap_AssetsCurrentAbstract_lbl" xlink:type="arc" />
      <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_AssetsCurrentAbstract_lbl" xml:lang="en-US">Current assets:</link:label>
      <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_CashAndCashEquivalentsAtCarryingValue" xlink:label="us-gaap_CashAndCashEquivalentsAtCarryingValue" />
      <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CashAndCashEquivalentsAtCarryingValue" xlink:to="us-gaap_CashAndCashEquivalentsAtCarryingValue_lbl" xlink:type="arc" />
      <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_CashAndCashEquivalentsAtCarryingValue_lbl" xml:lang="en-US">Cash and cash equivalents</link:label>
      <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ShortTermInvestments" xlink:label="us-gaap_ShortTermInvestments" />
      <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ShortTermInvestments" xlink:to="us-gaap_ShortTermInvestments_lbl" xlink:type="arc" />
      <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ShortTermInvestments_lbl" xml:lang="en-US">Short-term investments</link:label>
      <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AvailableForSaleSecuritiesCurrent" xlink:label="us-gaap_AvailableForSaleSecuritiesCurrent" />
      <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AvailableForSaleSecuritiesCurrent" xlink:to="us-gaap_AvailableForSaleSecuritiesCurrent_lbl" xlink:type="arc" />
      <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_AvailableForSaleSecuritiesCurrent_lbl" xml:lang="en-US">Investments in marketable equity securities, at fair value</link:label>
      <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_PrepaidExpenseAndOtherAssetsCurrent" xlink:label="us-gaap_PrepaidExpenseAndOtherAssetsCurrent" />
      <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PrepaidExpenseAndOtherAssetsCurrent" xlink:to="us-gaap_PrepaidExpenseAndOtherAssetsCurrent_lbl" xlink:type="arc" />
      <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_PrepaidExpenseAndOtherAssetsCurrent_lbl" xml:lang="en-US">Prepaid expenses and other</link:label>
      <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AssetsCurrent" xlink:label="us-gaap_AssetsCurrent" />
      <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AssetsCurrent" xlink:to="us-gaap_AssetsCurrent_lbl" xlink:type="arc" />
      <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="us-gaap_AssetsCurrent_lbl" xml:lang="en-US">Total current assets</link:label>
      <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_MineralPropertiesNet" xlink:label="us-gaap_MineralPropertiesNet" />
      <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_MineralPropertiesNet" xlink:to="us-gaap_MineralPropertiesNet_lbl" xlink:type="arc" />
      <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_MineralPropertiesNet_lbl" xml:lang="en-US">Mineral properties</link:label>
      <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_OtherAssetsNoncurrent" xlink:label="us-gaap_OtherAssetsNoncurrent" />
      <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_OtherAssetsNoncurrent" xlink:to="us-gaap_OtherAssetsNoncurrent_lbl" xlink:type="arc" />
      <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_OtherAssetsNoncurrent_lbl" xml:lang="en-US">Other assets</link:label>
      <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_PrepaidExpenseAndOtherAssets" xlink:label="us-gaap_PrepaidExpenseAndOtherAssets" />
      <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PrepaidExpenseAndOtherAssets" xlink:to="us-gaap_PrepaidExpenseAndOtherAssets_lbl" xlink:type="arc" />
      <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_PrepaidExpenseAndOtherAssets_lbl" xml:lang="en-US">Total assets</link:label>
      <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_LiabilitiesAndStockholdersEquityAbstract" xlink:label="us-gaap_LiabilitiesAndStockholdersEquityAbstract" />
      <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LiabilitiesAndStockholdersEquityAbstract" xlink:to="us-gaap_LiabilitiesAndStockholdersEquityAbstract_lbl" xlink:type="arc" />
      <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_LiabilitiesAndStockholdersEquityAbstract_lbl" xml:lang="en-US">Liabilities and Shareholders&#8217; Equity</link:label>
      <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_LiabilitiesCurrentAbstract" xlink:label="us-gaap_LiabilitiesCurrentAbstract" />
      <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LiabilitiesCurrentAbstract" xlink:to="us-gaap_LiabilitiesCurrentAbstract_lbl" xlink:type="arc" />
      <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_LiabilitiesCurrentAbstract_lbl" xml:lang="en-US">Current liabilities:</link:label>
      <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AccruedLiabilitiesCurrent" xlink:label="us-gaap_AccruedLiabilitiesCurrent" />
      <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AccruedLiabilitiesCurrent" xlink:to="us-gaap_AccruedLiabilitiesCurrent_lbl" xlink:type="arc" />
      <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_AccruedLiabilitiesCurrent_lbl" xml:lang="en-US">Accounts payable</link:label>
      <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_LiabilitiesCurrent" xlink:label="us-gaap_LiabilitiesCurrent" />
      <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LiabilitiesCurrent" xlink:to="us-gaap_LiabilitiesCurrent_lbl" xlink:type="arc" />
      <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_LiabilitiesCurrent_lbl" xml:lang="en-US">Total current liabilities</link:label>
      <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_LiabilitiesOtherThanLongTermDebtNoncurrentAbstract" xlink:label="us-gaap_LiabilitiesOtherThanLongTermDebtNoncurrentAbstract" />
      <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LiabilitiesOtherThanLongTermDebtNoncurrentAbstract" xlink:to="us-gaap_LiabilitiesOtherThanLongTermDebtNoncurrentAbstract_lbl" xlink:type="arc" />
      <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_LiabilitiesOtherThanLongTermDebtNoncurrentAbstract_lbl" xml:lang="en-US">Long-term liabilities</link:label>
      <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_MineReclamationAndClosingLiabilityNoncurrent" xlink:label="us-gaap_MineReclamationAndClosingLiabilityNoncurrent" />
      <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_MineReclamationAndClosingLiabilityNoncurrent" xlink:to="us-gaap_MineReclamationAndClosingLiabilityNoncurrent_lbl" xlink:type="arc" />
      <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_MineReclamationAndClosingLiabilityNoncurrent_lbl" xml:lang="en-US">Asset retirement obligation &#8211; Lik</link:label>
      <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_StockholdersEquityAbstract" xlink:label="us-gaap_StockholdersEquityAbstract" />
      <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_StockholdersEquityAbstract" xlink:to="us-gaap_StockholdersEquityAbstract_lbl" xlink:type="arc" />
      <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_StockholdersEquityAbstract_lbl" xml:lang="en-US">Shareholders&#8217; equity:</link:label>
      <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_PreferredStockValue" xlink:label="us-gaap_PreferredStockValue" />
      <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PreferredStockValue" xlink:to="us-gaap_PreferredStockValue_lbl" xlink:type="arc" />
      <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_PreferredStockValue_lbl" xml:lang="en-US">Preferred stock, $0.01 par value, authorized 10,000,000 shares (none issued and outstanding at March 31, 2018 and December 31, 2017)</link:label>
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      <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CommonStockValue" xlink:to="us-gaap_CommonStockValue_lbl" xlink:type="arc" />
      <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_CommonStockValue_lbl" xml:lang="en-US">Common stock, $0.01 par value, authorized 100,000,000 shares (58,381,952 and 58,434,566 shares, respectively, issued and outstanding at March 31, 2018 and December 31, 2017)</link:label>
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      <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AdditionalPaidInCapital" xlink:to="us-gaap_AdditionalPaidInCapital_lbl" xlink:type="arc" />
      <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_AdditionalPaidInCapital_lbl" xml:lang="en-US">Additional paid-in capital</link:label>
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      <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_RetainedEarningsAccumulatedDeficit" xlink:to="us-gaap_RetainedEarningsAccumulatedDeficit_lbl" xlink:type="arc" />
      <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_RetainedEarningsAccumulatedDeficit_lbl" xml:lang="en-US">Accumulated deficit</link:label>
      <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest" xlink:label="us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest" />
      <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest" xlink:to="us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_lbl" xlink:type="arc" />
      <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_lbl" xml:lang="en-US">Total shareholders&#8217; equity</link:label>
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      <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LiabilitiesAndStockholdersEquity" xlink:to="us-gaap_LiabilitiesAndStockholdersEquity_lbl" xlink:type="arc" />
      <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="us-gaap_LiabilitiesAndStockholdersEquity_lbl" xml:lang="en-US">Total liabilities and shareholders&#8217; equity</link:label>
      <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_PreferredStockNumberOfSharesParValueAndOtherDisclosuresAbstract" xlink:label="us-gaap_PreferredStockNumberOfSharesParValueAndOtherDisclosuresAbstract" />
      <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PreferredStockNumberOfSharesParValueAndOtherDisclosuresAbstract" xlink:to="us-gaap_PreferredStockNumberOfSharesParValueAndOtherDisclosuresAbstract_lbl" xlink:type="arc" />
      <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_PreferredStockNumberOfSharesParValueAndOtherDisclosuresAbstract_lbl" xml:lang="en-US">Preferred stock</link:label>
      <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_PreferredStockParOrStatedValuePerShare" xlink:label="us-gaap_PreferredStockParOrStatedValuePerShare" />
      <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PreferredStockParOrStatedValuePerShare" xlink:to="us-gaap_PreferredStockParOrStatedValuePerShare_lbl" xlink:type="arc" />
      <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_PreferredStockParOrStatedValuePerShare_lbl" xml:lang="en-US">Preferred stock, par value</link:label>
      <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_PreferredStockSharesAuthorized" xlink:label="us-gaap_PreferredStockSharesAuthorized" />
      <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PreferredStockSharesAuthorized" xlink:to="us-gaap_PreferredStockSharesAuthorized_lbl" xlink:type="arc" />
      <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_PreferredStockSharesAuthorized_lbl" xml:lang="en-US">Preferred stock, shares authorized</link:label>
      <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_PreferredStockSharesIssued" xlink:label="us-gaap_PreferredStockSharesIssued" />
      <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PreferredStockSharesIssued" xlink:to="us-gaap_PreferredStockSharesIssued_lbl" xlink:type="arc" />
      <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_PreferredStockSharesIssued_lbl" xml:lang="en-US">Preferred stock, shares issued</link:label>
      <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_CommonStockNumberOfSharesParValueAndOtherDisclosuresAbstract" xlink:label="us-gaap_CommonStockNumberOfSharesParValueAndOtherDisclosuresAbstract" />
      <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CommonStockNumberOfSharesParValueAndOtherDisclosuresAbstract" xlink:to="us-gaap_CommonStockNumberOfSharesParValueAndOtherDisclosuresAbstract_lbl" xlink:type="arc" />
      <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_CommonStockNumberOfSharesParValueAndOtherDisclosuresAbstract_lbl" xml:lang="en-US">Common stock</link:label>
      <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_CommonStockParOrStatedValuePerShare" xlink:label="us-gaap_CommonStockParOrStatedValuePerShare" />
      <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CommonStockParOrStatedValuePerShare" xlink:to="us-gaap_CommonStockParOrStatedValuePerShare_lbl" xlink:type="arc" />
      <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_CommonStockParOrStatedValuePerShare_lbl" xml:lang="en-US">Common stock, par value</link:label>
      <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_CommonStockSharesAuthorized" xlink:label="us-gaap_CommonStockSharesAuthorized" />
      <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CommonStockSharesAuthorized" xlink:to="us-gaap_CommonStockSharesAuthorized_lbl" xlink:type="arc" />
      <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_CommonStockSharesAuthorized_lbl" xml:lang="en-US">Common stock, shares authorized</link:label>
      <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_CommonStockSharesIssued" xlink:label="us-gaap_CommonStockSharesIssued" />
      <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CommonStockSharesIssued" xlink:to="us-gaap_CommonStockSharesIssued_lbl" xlink:type="arc" />
      <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_CommonStockSharesIssued_lbl" xml:lang="en-US">Common stock, shares issued</link:label>
      <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_CommonStockSharesOutstanding" xlink:label="us-gaap_CommonStockSharesOutstanding" />
      <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CommonStockSharesOutstanding" xlink:to="us-gaap_CommonStockSharesOutstanding_lbl" xlink:type="arc" />
      <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_CommonStockSharesOutstanding_lbl" xml:lang="en-US">Common stock, shares outstanding</link:label>
      <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_IncomeStatementAbstract" xlink:label="us-gaap_IncomeStatementAbstract" />
      <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_IncomeStatementAbstract" xlink:to="us-gaap_IncomeStatementAbstract_lbl" xlink:type="arc" />
      <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_IncomeStatementAbstract_lbl" xml:lang="en-US">Income Statement [Abstract]</link:label>
      <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_CostsAndExpensesAbstract" xlink:label="us-gaap_CostsAndExpensesAbstract" />
      <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CostsAndExpensesAbstract" xlink:to="us-gaap_CostsAndExpensesAbstract_lbl" xlink:type="arc" />
      <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_CostsAndExpensesAbstract_lbl" xml:lang="en-US">Costs, expenses and other:</link:label>
      <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ExplorationExpenseMining" xlink:label="us-gaap_ExplorationExpenseMining" />
      <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ExplorationExpenseMining" xlink:to="us-gaap_ExplorationExpenseMining_lbl" xlink:type="arc" />
      <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ExplorationExpenseMining_lbl" xml:lang="en-US">Exploration expense</link:label>
      <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DepreciationAndAmortization" xlink:label="us-gaap_DepreciationAndAmortization" />
      <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DepreciationAndAmortization" xlink:to="us-gaap_DepreciationAndAmortization_lbl" xlink:type="arc" />
      <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_DepreciationAndAmortization_lbl" xml:lang="en-US">Depreciation and amortization</link:label>
      <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_GeneralAndAdministrativeExpense" xlink:label="us-gaap_GeneralAndAdministrativeExpense" />
      <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_GeneralAndAdministrativeExpense" xlink:to="us-gaap_GeneralAndAdministrativeExpense_lbl" xlink:type="arc" />
      <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_GeneralAndAdministrativeExpense_lbl" xml:lang="en-US">General and administrative</link:label>
      <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_OtherCostAndExpenseOperating" xlink:label="us-gaap_OtherCostAndExpenseOperating" />
      <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_OtherCostAndExpenseOperating" xlink:to="us-gaap_OtherCostAndExpenseOperating_lbl" xlink:type="arc" />
      <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="us-gaap_OtherCostAndExpenseOperating_lbl" xml:lang="en-US">Total costs, expenses and other</link:label>
      <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_OtherIncomeDisclosureNonoperating" xlink:label="us-gaap_OtherIncomeDisclosureNonoperating" />
      <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_OtherIncomeDisclosureNonoperating" xlink:to="us-gaap_OtherIncomeDisclosureNonoperating_lbl" xlink:type="arc" />
      <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_OtherIncomeDisclosureNonoperating_lbl" xml:lang="en-US">Other (loss) income</link:label>
      <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_InterestIncomeExpenseNet" xlink:label="us-gaap_InterestIncomeExpenseNet" />
      <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_InterestIncomeExpenseNet" xlink:to="us-gaap_InterestIncomeExpenseNet_lbl" xlink:type="arc" />
      <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_InterestIncomeExpenseNet_lbl" xml:lang="en-US">Interest income (net)</link:label>
      <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_UnrealizedGainLossOnMarketableSecuritiesCostMethodInvestmentsAndOtherInvestments" xlink:label="us-gaap_UnrealizedGainLossOnMarketableSecuritiesCostMethodInvestmentsAndOtherInvestments" />
      <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_UnrealizedGainLossOnMarketableSecuritiesCostMethodInvestmentsAndOtherInvestments" xlink:to="us-gaap_UnrealizedGainLossOnMarketableSecuritiesCostMethodInvestmentsAndOtherInvestments_lbl" xlink:type="arc" />
      <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_UnrealizedGainLossOnMarketableSecuritiesCostMethodInvestmentsAndOtherInvestments_lbl" xml:lang="en-US">Unrealized (loss) gain on marketable equity securities</link:label>
      <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_GainLossOnDerivativeInstrumentsHeldForTradingPurposesNet" xlink:label="us-gaap_GainLossOnDerivativeInstrumentsHeldForTradingPurposesNet" />
      <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_GainLossOnDerivativeInstrumentsHeldForTradingPurposesNet" xlink:to="us-gaap_GainLossOnDerivativeInstrumentsHeldForTradingPurposesNet_lbl" xlink:type="arc" />
      <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_GainLossOnDerivativeInstrumentsHeldForTradingPurposesNet_lbl" xml:lang="en-US">Gain on derivative instruments</link:label>
      <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_OtherNonrecurringIncomeExpense" xlink:label="us-gaap_OtherNonrecurringIncomeExpense" />
      <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_OtherNonrecurringIncomeExpense" xlink:to="us-gaap_OtherNonrecurringIncomeExpense_lbl" xlink:type="arc" />
      <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedTotalLabel" xlink:label="us-gaap_OtherNonrecurringIncomeExpense_lbl" xml:lang="en-US">Total other (loss) income</link:label>
      <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_NetIncomeLoss" xlink:label="us-gaap_NetIncomeLoss" />
      <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_NetIncomeLoss" xlink:to="us-gaap_NetIncomeLoss_lbl" xlink:type="arc" />
      <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_NetIncomeLoss_lbl" xml:lang="en-US">Net loss</link:label>
      <link:loc xlink:type="locator" xlink:href="xpl-20180331.xsd#XPL_IncomeLossPerShareAttributableToSolitarioShareholders" xlink:label="XPL_IncomeLossPerShareAttributableToSolitarioShareholders" />
      <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="XPL_IncomeLossPerShareAttributableToSolitarioShareholders" xlink:to="XPL_IncomeLossPerShareAttributableToSolitarioShareholders_lbl" xlink:type="arc" />
      <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="XPL_IncomeLossPerShareAttributableToSolitarioShareholders_lbl" xml:lang="en-US">Loss per common share:</link:label>
      <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_EarningsPerShareBasicAndDiluted" xlink:label="us-gaap_EarningsPerShareBasicAndDiluted" />
      <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_EarningsPerShareBasicAndDiluted" xlink:to="us-gaap_EarningsPerShareBasicAndDiluted_lbl" xlink:type="arc" />
      <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_EarningsPerShareBasicAndDiluted_lbl" xml:lang="en-US">Basic and diluted</link:label>
      <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_WeightedAverageNumberOfSharesOutstandingAbstract" xlink:label="us-gaap_WeightedAverageNumberOfSharesOutstandingAbstract" />
      <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_WeightedAverageNumberOfSharesOutstandingAbstract" xlink:to="us-gaap_WeightedAverageNumberOfSharesOutstandingAbstract_lbl" xlink:type="arc" />
      <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_WeightedAverageNumberOfSharesOutstandingAbstract_lbl" xml:lang="en-US">Weighted average shares outstanding:</link:label>
      <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_WeightedAverageNumberOfShareOutstandingBasicAndDiluted" xlink:label="us-gaap_WeightedAverageNumberOfShareOutstandingBasicAndDiluted" />
      <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_WeightedAverageNumberOfShareOutstandingBasicAndDiluted" xlink:to="us-gaap_WeightedAverageNumberOfShareOutstandingBasicAndDiluted_lbl" xlink:type="arc" />
      <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_WeightedAverageNumberOfShareOutstandingBasicAndDiluted_lbl" xml:lang="en-US">Basic and diluted</link:label>
      <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_StatementOfCashFlowsAbstract" xlink:label="us-gaap_StatementOfCashFlowsAbstract" />
      <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_StatementOfCashFlowsAbstract" xlink:to="us-gaap_StatementOfCashFlowsAbstract_lbl" xlink:type="arc" />
      <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_StatementOfCashFlowsAbstract_lbl" xml:lang="en-US">Statement of Cash Flows [Abstract]</link:label>
      <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract" xlink:label="us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract" />
      <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract" xlink:to="us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract_lbl" xlink:type="arc" />
      <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract_lbl" xml:lang="en-US">Operating activities:</link:label>
      <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AdjustmentsNoncashItemsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract" xlink:label="us-gaap_AdjustmentsNoncashItemsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract" />
      <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AdjustmentsNoncashItemsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract" xlink:to="us-gaap_AdjustmentsNoncashItemsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_lbl" xlink:type="arc" />
      <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_AdjustmentsNoncashItemsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_lbl" xml:lang="en-US">Adjustments to reconcile net loss to net cash used in operating activities:</link:label>
      <link:loc xlink:type="locator" xlink:href="xpl-20180331.xsd#XPL_UnrealizedGainLossAvailableForSaleSecurities" xlink:label="XPL_UnrealizedGainLossAvailableForSaleSecurities" />
      <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="XPL_UnrealizedGainLossAvailableForSaleSecurities" xlink:to="XPL_UnrealizedGainLossAvailableForSaleSecurities_lbl" xlink:type="arc" />
      <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="XPL_UnrealizedGainLossAvailableForSaleSecurities_lbl" xml:lang="en-US">Unrealized loss (gain) on sale of marketable equity securities</link:label>
      <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_StockOptionPlanExpense" xlink:label="us-gaap_StockOptionPlanExpense" />
      <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_StockOptionPlanExpense" xlink:to="us-gaap_StockOptionPlanExpense_lbl" xlink:type="arc" />
      <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_StockOptionPlanExpense_lbl" xml:lang="en-US">Employee stock option expense</link:label>
      <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_UnrealizedGainLossOnDerivatives" xlink:label="us-gaap_UnrealizedGainLossOnDerivatives" />
      <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_UnrealizedGainLossOnDerivatives" xlink:to="us-gaap_UnrealizedGainLossOnDerivatives_lbl" xlink:type="arc" />
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      <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_IncreaseDecreaseInPrepaidExpense" xlink:to="us-gaap_IncreaseDecreaseInPrepaidExpense_lbl" xlink:type="arc" />
      <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_IncreaseDecreaseInPrepaidExpense_lbl" xml:lang="en-US">Prepaid expenses and other current assets</link:label>
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      <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_IncreaseDecreaseInAccountsPayableAndAccruedLiabilities" xlink:to="us-gaap_IncreaseDecreaseInAccountsPayableAndAccruedLiabilities_lbl" xlink:type="arc" />
      <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_IncreaseDecreaseInAccountsPayableAndAccruedLiabilities_lbl" xml:lang="en-US">Accounts payable and other current liabilities</link:label>
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      <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract" xlink:label="us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract" />
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      <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_PaymentsToAcquireAvailableForSaleSecuritiesEquity" xlink:label="us-gaap_PaymentsToAcquireAvailableForSaleSecuritiesEquity" />
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      <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:label="us-gaap_PaymentsToAcquireAvailableForSaleSecuritiesEquity_lbl" xml:lang="en-US">Sale of short-term investments, net</link:label>
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      <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:label="us-gaap_PaymentsToAcquireOtherProductiveAssets_lbl" xml:lang="en-US">Purchase of other assets</link:label>
      <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ProceedsFromSaleAndMaturityOfMarketableSecurities" xlink:label="us-gaap_ProceedsFromSaleAndMaturityOfMarketableSecurities" />
      <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ProceedsFromSaleAndMaturityOfMarketableSecurities" xlink:to="us-gaap_ProceedsFromSaleAndMaturityOfMarketableSecurities_lbl" xlink:type="arc" />
      <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ProceedsFromSaleAndMaturityOfMarketableSecurities_lbl" xml:lang="en-US">Proceeds from the sale of marketable equity securities</link:label>
      <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_PaymentsForProceedsFromAvailableforsaleSecuritiesShortterm" xlink:label="us-gaap_PaymentsForProceedsFromAvailableforsaleSecuritiesShortterm" />
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      <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:label="us-gaap_PaymentsForProceedsFromAvailableforsaleSecuritiesShortterm_lbl" xml:lang="en-US">Purchase of marketable equity securities</link:label>
      <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ProceedsFromDerivativeInstrumentInvestingActivities" xlink:label="us-gaap_ProceedsFromDerivativeInstrumentInvestingActivities" />
      <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ProceedsFromDerivativeInstrumentInvestingActivities" xlink:to="us-gaap_ProceedsFromDerivativeInstrumentInvestingActivities_lbl" xlink:type="arc" />
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      <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_NetCashProvidedByUsedInInvestingActivities" xlink:label="us-gaap_NetCashProvidedByUsedInInvestingActivities" />
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      <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract" xlink:label="us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract" />
      <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract" xlink:to="us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_lbl" xlink:type="arc" />
      <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_lbl" xml:lang="en-US">Financing activities:</link:label>
      <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_PaymentsForRepurchaseOfCommonStock" xlink:label="us-gaap_PaymentsForRepurchaseOfCommonStock" />
      <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PaymentsForRepurchaseOfCommonStock" xlink:to="us-gaap_PaymentsForRepurchaseOfCommonStock_lbl" xlink:type="arc" />
      <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:label="us-gaap_PaymentsForRepurchaseOfCommonStock_lbl" xml:lang="en-US">Purchase of common stock for cancellation</link:label>
      <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_NetCashProvidedByUsedInFinancingActivities" xlink:label="us-gaap_NetCashProvidedByUsedInFinancingActivities" />
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      <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseExcludingExchangeRateEffect" xlink:label="us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseExcludingExchangeRateEffect" />
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      <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseExcludingExchangeRateEffect_lbl" xml:lang="en-US">Net decrease in cash and cash equivalents</link:label>
      <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CashAndCashEquivalentsAtCarryingValue" xlink:to="us-gaap_CashAndCashEquivalentsAtCarryingValue_2_lbl" xlink:type="arc" />
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      <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CashAndCashEquivalentsAtCarryingValue" xlink:to="us-gaap_CashAndCashEquivalentsAtCarryingValue_3_lbl" xlink:type="arc" />
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      <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_BusinessDescriptionAndAccountingPoliciesTextBlock" xlink:label="us-gaap_BusinessDescriptionAndAccountingPoliciesTextBlock" />
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      <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_BusinessDescriptionAndAccountingPoliciesTextBlock_lbl" xml:lang="en-US">Business and Significant Accounting Policies</link:label>
      <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/srt/2018/elts/srt-2018-01-31.xsd#srt_ExtractiveIndustriesAbstract" xlink:label="srt_ExtractiveIndustriesAbstract" />
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      <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="srt_ExtractiveIndustriesAbstract_lbl" xml:lang="en-US">Extractive Industries [Abstract]</link:label>
      <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_MineralIndustriesDisclosuresTextBlock" xlink:label="us-gaap_MineralIndustriesDisclosuresTextBlock" />
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      <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_MineralIndustriesDisclosuresTextBlock_lbl" xml:lang="en-US">Mineral Property</link:label>
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      <link:loc xlink:type="locator" xlink:href="xpl-20180331.xsd#XPL_InvestmentsDebtAndEquitySecuritiesTextBlock" xlink:label="XPL_InvestmentsDebtAndEquitySecuritiesTextBlock" />
      <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="XPL_InvestmentsDebtAndEquitySecuritiesTextBlock" xlink:to="XPL_InvestmentsDebtAndEquitySecuritiesTextBlock_lbl" xlink:type="arc" />
      <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="XPL_InvestmentsDebtAndEquitySecuritiesTextBlock_lbl" xml:lang="en-US">Marketable Equity Securities</link:label>
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      <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_OtherAssetsDisclosureTextBlock" xlink:label="us-gaap_OtherAssetsDisclosureTextBlock" />
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      <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_OtherAssetsDisclosureTextBlock_lbl" xml:lang="en-US">Other Assets</link:label>
      <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DerivativeInstrumentsAndHedgingActivitiesDisclosureAbstract" xlink:label="us-gaap_DerivativeInstrumentsAndHedgingActivitiesDisclosureAbstract" />
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      <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DerivativeInstrumentsAndHedgingActivitiesDisclosureTextBlock" xlink:label="us-gaap_DerivativeInstrumentsAndHedgingActivitiesDisclosureTextBlock" />
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      <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_FairValueDisclosuresTextBlock" xlink:label="us-gaap_FairValueDisclosuresTextBlock" />
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      <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_RealizedGainLossOnMarketableSecuritiesCostMethodInvestmentsAndOtherInvestments" xlink:to="us-gaap_RealizedGainLossOnMarketableSecuritiesCostMethodInvestmentsAndOtherInvestments_lbl" xlink:type="arc" />
      <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_RealizedGainLossOnMarketableSecuritiesCostMethodInvestmentsAndOtherInvestments_lbl" xml:lang="en-US">Realized gain on marketable equity securities sold</link:label>
      <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ProceedsFromSaleOfAvailableForSaleSecuritiesEquity" xlink:label="us-gaap_ProceedsFromSaleOfAvailableForSaleSecuritiesEquity" />
      <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ProceedsFromSaleOfAvailableForSaleSecuritiesEquity" xlink:to="us-gaap_ProceedsFromSaleOfAvailableForSaleSecuritiesEquity_lbl" xlink:type="arc" />
      <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ProceedsFromSaleOfAvailableForSaleSecuritiesEquity_lbl" xml:lang="en-US">Proceeds from the sale of marketable equity securities sold</link:label>
      <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_PaymentsToAcquireAvailableForSaleSecurities" xlink:label="us-gaap_PaymentsToAcquireAvailableForSaleSecurities" />
      <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PaymentsToAcquireAvailableForSaleSecurities" xlink:to="us-gaap_PaymentsToAcquireAvailableForSaleSecurities_lbl" xlink:type="arc" />
      <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_PaymentsToAcquireAvailableForSaleSecurities_lbl" xml:lang="en-US">Purchase of marketable equity securities</link:label>
      <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_MarketableSecuritiesUnrealizedGainLoss" xlink:label="us-gaap_MarketableSecuritiesUnrealizedGainLoss" />
      <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_MarketableSecuritiesUnrealizedGainLoss" xlink:to="us-gaap_MarketableSecuritiesUnrealizedGainLoss_lbl" xlink:type="arc" />
      <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_MarketableSecuritiesUnrealizedGainLoss_lbl" xml:lang="en-US">Gross unrealized (loss) gain recorded in the statement of operations</link:label>
      <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_IncreaseDecreaseInTradingSecurities" xlink:label="us-gaap_IncreaseDecreaseInTradingSecurities" />
      <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_IncreaseDecreaseInTradingSecurities" xlink:to="us-gaap_IncreaseDecreaseInTradingSecurities_lbl" xlink:type="arc" />
      <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_IncreaseDecreaseInTradingSecurities_lbl" xml:lang="en-US">Change in marketable equity securities at fair value</link:label>
      <link:loc xlink:type="locator" xlink:href="xpl-20180331.xsd#XPL_UnitsOfSharesAndWarrantsPurchased" xlink:label="XPL_UnitsOfSharesAndWarrantsPurchased" />
      <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="XPL_UnitsOfSharesAndWarrantsPurchased" xlink:to="XPL_UnitsOfSharesAndWarrantsPurchased_lbl" xlink:type="arc" />
      <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="XPL_UnitsOfSharesAndWarrantsPurchased_lbl" xml:lang="en-US">Units Vendetta purchased</link:label>
      <link:loc xlink:type="locator" xlink:href="xpl-20180331.xsd#XPL_PriceOfFinancialInstrumentsOwned" xlink:label="XPL_PriceOfFinancialInstrumentsOwned" />
      <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="XPL_PriceOfFinancialInstrumentsOwned" xlink:to="XPL_PriceOfFinancialInstrumentsOwned_lbl" xlink:type="arc" />
      <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="XPL_PriceOfFinancialInstrumentsOwned_lbl" xml:lang="en-US">Aggregate consideration for units of Vendetta (common stock $186,000; Warrants $103,000)</link:label>
      <link:loc xlink:type="locator" xlink:href="xpl-20180331.xsd#XPL_SharesSoldMarketableEquitySecurities" xlink:label="XPL_SharesSoldMarketableEquitySecurities" />
      <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="XPL_SharesSoldMarketableEquitySecurities" xlink:to="XPL_SharesSoldMarketableEquitySecurities_lbl" xlink:type="arc" />
      <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="XPL_SharesSoldMarketableEquitySecurities_lbl" xml:lang="en-US">Common shares Vendetta sold</link:label>
      <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ProceedsFromSalesOfAssetsInvestingActivities" xlink:label="us-gaap_ProceedsFromSalesOfAssetsInvestingActivities" />
      <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ProceedsFromSalesOfAssetsInvestingActivities" xlink:to="us-gaap_ProceedsFromSalesOfAssetsInvestingActivities_lbl" xlink:type="arc" />
      <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ProceedsFromSalesOfAssetsInvestingActivities_lbl" xml:lang="en-US">Proceeds from sale of Vendetta</link:label>
      <link:loc xlink:type="locator" xlink:href="xpl-20180331.xsd#XPL_CostOfSaleOfAssets" xlink:label="XPL_CostOfSaleOfAssets" />
      <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="XPL_CostOfSaleOfAssets" xlink:to="XPL_CostOfSaleOfAssets_lbl" xlink:type="arc" />
      <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="XPL_CostOfSaleOfAssets_lbl" xml:lang="en-US">Cost of sale of Vendetta</link:label>
      <link:loc xlink:type="locator" xlink:href="xpl-20180331.xsd#XPL_MarketableEquitySecuritiesSharesReceivedUponExerciseOfWarrants" xlink:label="XPL_MarketableEquitySecuritiesSharesReceivedUponExerciseOfWarrants" />
      <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="XPL_MarketableEquitySecuritiesSharesReceivedUponExerciseOfWarrants" xlink:to="XPL_MarketableEquitySecuritiesSharesReceivedUponExerciseOfWarrants_lbl" xlink:type="arc" />
      <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="XPL_MarketableEquitySecuritiesSharesReceivedUponExerciseOfWarrants_lbl" xml:lang="en-US">Vendetta warrants exercised and shares received</link:label>
      <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_PaymentsToAcquireMarketableSecurities" xlink:label="us-gaap_PaymentsToAcquireMarketableSecurities" />
      <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PaymentsToAcquireMarketableSecurities" xlink:to="us-gaap_PaymentsToAcquireMarketableSecurities_lbl" xlink:type="arc" />
      <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_PaymentsToAcquireMarketableSecurities_lbl" xml:lang="en-US">US dollar cost of warrants exercised</link:label>
      <link:loc xlink:type="locator" xlink:href="xpl-20180331.xsd#XPL_IntrinsicValueWarrant" xlink:label="XPL_IntrinsicValueWarrant" />
      <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="XPL_IntrinsicValueWarrant" xlink:to="XPL_IntrinsicValueWarrant_lbl" xlink:type="arc" />
      <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="XPL_IntrinsicValueWarrant_lbl" xml:lang="en-US">Intrinsic value Vendetta Warrants</link:label>
      <link:loc xlink:type="locator" xlink:href="xpl-20180331.xsd#XPL_TotalValueWarrant" xlink:label="XPL_TotalValueWarrant" />
      <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="XPL_TotalValueWarrant" xlink:to="XPL_TotalValueWarrant_lbl" xlink:type="arc" />
      <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="XPL_TotalValueWarrant_lbl" xml:lang="en-US">Total value Vendetta Warrants</link:label>
      <link:loc xlink:type="locator" xlink:href="xpl-20180331.xsd#XPL_SharesOwnedVendetta" xlink:label="XPL_SharesOwnedVendetta" />
      <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="XPL_SharesOwnedVendetta" xlink:to="XPL_SharesOwnedVendetta_lbl" xlink:type="arc" />
      <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="XPL_SharesOwnedVendetta_lbl" xml:lang="en-US">Number of Vendetta shares owned</link:label>
      <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_PropertyPlantAndEquipmentNet" xlink:label="us-gaap_PropertyPlantAndEquipmentNet" />
      <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PropertyPlantAndEquipmentNet" xlink:to="us-gaap_PropertyPlantAndEquipmentNet_lbl" xlink:type="arc" />
      <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_PropertyPlantAndEquipmentNet_lbl" xml:lang="en-US">Furniture and fixtures, net of accumulated depreciation</link:label>
      <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedEquipment" xlink:label="us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedEquipment" />
      <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedEquipment" xlink:to="us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedEquipment_lbl" xlink:type="arc" />
      <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedEquipment_lbl" xml:lang="en-US">Lik project equipment, net of accumulated depreciation</link:label>
      <link:loc xlink:type="locator" xlink:href="xpl-20180331.xsd#XPL_OtherAssetsVendettaWarrants" xlink:label="XPL_OtherAssetsVendettaWarrants" />
      <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="XPL_OtherAssetsVendettaWarrants" xlink:to="XPL_OtherAssetsVendettaWarrants_lbl" xlink:type="arc" />
      <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="XPL_OtherAssetsVendettaWarrants_lbl" xml:lang="en-US">Exploration bonds and other assets</link:label>
      <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_OtherAssets" xlink:label="us-gaap_OtherAssets" />
      <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_OtherAssets" xlink:to="us-gaap_OtherAssets_lbl" xlink:type="arc" />
      <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_OtherAssets_lbl" xml:lang="en-US">Total other assets</link:label>
      <link:loc xlink:type="locator" xlink:href="xpl-20180331.xsd#XPL_GainOnCalls" xlink:label="XPL_GainOnCalls" />
      <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="XPL_GainOnCalls" xlink:to="XPL_GainOnCalls_lbl" xlink:type="arc" />
      <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="XPL_GainOnCalls_lbl" xml:lang="en-US">Gain on Kinross calls</link:label>
      <link:loc xlink:type="locator" xlink:href="xpl-20180331.xsd#XPL_GainOnWarrants" xlink:label="XPL_GainOnWarrants" />
      <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="XPL_GainOnWarrants" xlink:to="XPL_GainOnWarrants_lbl" xlink:type="arc" />
      <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="XPL_GainOnWarrants_lbl" xml:lang="en-US">Gain on Vendetta Warrants</link:label>
      <link:loc xlink:type="locator" xlink:href="xpl-20180331.xsd#XPL_DerivativeInstrumentsNotDesignatedAsHedgingInstrumentsGainLossNet2" xlink:label="XPL_DerivativeInstrumentsNotDesignatedAsHedgingInstrumentsGainLossNet2" />
      <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="XPL_DerivativeInstrumentsNotDesignatedAsHedgingInstrumentsGainLossNet2" xlink:to="XPL_DerivativeInstrumentsNotDesignatedAsHedgingInstrumentsGainLossNet2_lbl" xlink:type="arc" />
      <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="XPL_DerivativeInstrumentsNotDesignatedAsHedgingInstrumentsGainLossNet2_lbl" xml:lang="en-US">Gain on derivative instruments</link:label>
      <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_GainLossOnDerivativeInstrumentsNetPretax" xlink:label="us-gaap_GainLossOnDerivativeInstrumentsNetPretax" />
      <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_GainLossOnDerivativeInstrumentsNetPretax" xlink:to="us-gaap_GainLossOnDerivativeInstrumentsNetPretax_lbl" xlink:type="arc" />
      <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_GainLossOnDerivativeInstrumentsNetPretax_lbl" xml:lang="en-US">Gain on derivative instruments</link:label>
      <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_InvestmentsFairValueDisclosure" xlink:to="us-gaap_InvestmentsFairValueDisclosure_2_lbl" xlink:type="arc" />
      <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_InvestmentsFairValueDisclosure_2_lbl" xml:lang="en-US">Marketable equity securities</link:label>
      <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_FinancialInstrumentsOwnedUSGovernmentAndAgencyObligationsAtFairValue" xlink:label="us-gaap_FinancialInstrumentsOwnedUSGovernmentAndAgencyObligationsAtFairValue" />
      <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FinancialInstrumentsOwnedUSGovernmentAndAgencyObligationsAtFairValue" xlink:to="us-gaap_FinancialInstrumentsOwnedUSGovernmentAndAgencyObligationsAtFairValue_lbl" xlink:type="arc" />
      <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_FinancialInstrumentsOwnedUSGovernmentAndAgencyObligationsAtFairValue_lbl" xml:lang="en-US">United States Treasury securities</link:label>
      <link:loc xlink:type="locator" xlink:href="xpl-20180331.xsd#XPL_CertificatesOfDepositAtFairValue" xlink:label="XPL_CertificatesOfDepositAtFairValue" />
      <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="XPL_CertificatesOfDepositAtFairValue" xlink:to="XPL_CertificatesOfDepositAtFairValue_lbl" xlink:type="arc" />
      <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="XPL_CertificatesOfDepositAtFairValue_lbl" xml:lang="en-US">Bank Certificates of Deposit</link:label>
      <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized" />
      <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized" xlink:to="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized_lbl" xlink:type="arc" />
      <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized_lbl" xml:lang="en-US">Shares reserved for awards under 2013 Plan</link:label>
      <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingNumber" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingNumber" />
      <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingNumber" xlink:to="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingNumber_lbl" xlink:type="arc" />
      <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingNumber_lbl" xml:lang="en-US">Options outstandiing with exercise prices between $0.54 and $1.74</link:label>
      <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross" />
      <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross" xlink:to="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross_lbl" xlink:type="arc" />
      <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross_lbl" xml:lang="en-US">Options issued to consultant at exercise price of $0.62 per share</link:label>
      <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedInPeriodFairValue1" xlink:label="us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedInPeriodFairValue1" />
      <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedInPeriodFairValue1" xlink:to="us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedInPeriodFairValue1_lbl" xlink:type="arc" />
      <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedInPeriodFairValue1_lbl" xml:lang="en-US">Grant date fair value of options issued to consultant</link:label>
      <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AllocatedShareBasedCompensationExpense" xlink:label="us-gaap_AllocatedShareBasedCompensationExpense" />
      <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AllocatedShareBasedCompensationExpense" xlink:to="us-gaap_AllocatedShareBasedCompensationExpense_lbl" xlink:type="arc" />
      <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_AllocatedShareBasedCompensationExpense_lbl" xml:lang="en-US">Stock option compensation expense recorded</link:label>
      <link:loc xlink:type="locator" xlink:href="xpl-20180331.xsd#XPL_ConditionalOptionGrant" xlink:label="XPL_ConditionalOptionGrant" />
      <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="XPL_ConditionalOptionGrant" xlink:to="XPL_ConditionalOptionGrant_lbl" xlink:type="arc" />
      <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="XPL_ConditionalOptionGrant_lbl" xml:lang="en-US">Additional options granted at $0.77 per share subject to shareholder approval</link:label>
      <link:loc xlink:type="locator" xlink:href="xpl-20180331.xsd#XPL_GrantDateFairValueConditionalOptionGrant" xlink:label="XPL_GrantDateFairValueConditionalOptionGrant" />
      <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="XPL_GrantDateFairValueConditionalOptionGrant" xlink:to="XPL_GrantDateFairValueConditionalOptionGrant_lbl" xlink:type="arc" />
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</TEXT>
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<DOCUMENT>
<TYPE>EX-101.PRE
<SEQUENCE>10
<FILENAME>xpl-20180331_pre.xml
<DESCRIPTION>XBRL PRESENTATION FILE
<TEXT>
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<span style="display: none;">v3.8.0.1</span><table class="report" border="0" cellspacing="2" id="idp6804881904">
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<th class="tl" colspan="1" rowspan="2"><div style="width: 200px;"><strong>Document and Entity Information - shares<br></strong></div></th>
<th class="th" colspan="1">3 Months Ended</th>
<th class="th" colspan="1"></th>
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<tr>
<th class="th"><div>Mar. 31, 2018</div></th>
<th class="th"><div>May 01, 2018</div></th>
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<td class="text">&#160;<span></span>
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<td class="text">&#160;<span></span>
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<td class="text">Solitario Zinc Corp.<span></span>
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<td class="text">&#160;<span></span>
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<td class="text">0000917225<span></span>
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<td class="text">&#160;<span></span>
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<td class="text">10-Q<span></span>
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<td class="text">&#160;<span></span>
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<tr class="re">
<td class="pl " style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_dei_DocumentPeriodEndDate', window );">Document Period End Date</a></td>
<td class="text">Mar. 31,  2018<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl " style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_dei_AmendmentFlag', window );">Amendment Flag</a></td>
<td class="text">false<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="re">
<td class="pl " style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_dei_CurrentFiscalYearEndDate', window );">Current Fiscal Year End Date</a></td>
<td class="text">--12-31<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl " style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_dei_EntityWellKnownSeasonedIssuer', window );">Is Entity a Well-known Seasoned Issuer?</a></td>
<td class="text">No<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="re">
<td class="pl " style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_dei_EntityVoluntaryFilers', window );">Is Entity a Voluntary Filer?</a></td>
<td class="text">No<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl " style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_dei_EntityCurrentReportingStatus', window );">Is Entity's Reporting Status Current?</a></td>
<td class="text">Yes<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="re">
<td class="pl " style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_dei_EntityFilerCategory', window );">Entity Filer Category</a></td>
<td class="text">Smaller Reporting Company<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl " style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_dei_EntityCommonStockSharesOutstanding', window );">Entity Common Stock, Shares Outstanding</a></td>
<td class="text">&#160;<span></span>
</td>
<td class="nump">58,332,266<span></span>
</td>
</tr>
<tr class="re">
<td class="pl " style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_dei_DocumentFiscalPeriodFocus', window );">Document Fiscal Period Focus</a></td>
<td class="text">Q1<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl " style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_dei_DocumentFiscalYearFocus', window );">Document Fiscal Year Focus</a></td>
<td class="text">2018<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
</table>
<div style="display: none;">
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<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- References</a><div><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">XPL_DocumentAndEntityInformationAbstract</td>
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<tr>
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<td>xbrli:stringItemType</td>
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<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_dei_AmendmentFlag">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div><p>If the value is true, then the document is an amendment to previously-filed/accepted document.</p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;"><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">dei_AmendmentFlag</td>
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<td>xbrli:booleanItemType</td>
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<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div><p>End date of current fiscal year in the format --MM-DD.</p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;"><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">dei_CurrentFiscalYearEndDate</td>
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<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_dei_DocumentFiscalPeriodFocus">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div><p>This is focus fiscal period of the document report. For a first quarter 2006 quarterly report, which may also provide financial information from prior periods, the first fiscal quarter should be given as the fiscal period focus. Values: FY, Q1, Q2, Q3, Q4, H1, H2, M9, T1, T2, T3, M8, CY.</p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;"><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">dei_DocumentFiscalPeriodFocus</td>
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<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>dei_</td>
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<td><strong> Data Type:</strong></td>
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<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
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<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
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<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div><p>This is focus fiscal year of the document report in CCYY format. For a 2006 annual report, which may also provide financial information from prior periods, fiscal 2006 should be given as the fiscal year focus. Example: 2006.</p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;"><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">dei_DocumentFiscalYearFocus</td>
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<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>dei_</td>
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<td><strong> Data Type:</strong></td>
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<td><strong> Balance Type:</strong></td>
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<tr>
<td><strong> Period Type:</strong></td>
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</div></td></tr>
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<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_dei_DocumentPeriodEndDate">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div><p>The end date of the period reflected on the cover page if a periodic report. For all other reports and registration statements containing historical data, it is the date up through which that historical data is presented.  If there is no historical data in the report, use the filing date. The format of the date is CCYY-MM-DD.</p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;"><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">dei_DocumentPeriodEndDate</td>
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<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>dei_</td>
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<td><strong> Data Type:</strong></td>
<td>xbrli:dateItemType</td>
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<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
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<td><strong> Period Type:</strong></td>
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</table></div>
</div></td></tr>
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<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_dei_DocumentType">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div><p>The type of document being provided (such as 10-K, 10-Q, 485BPOS, etc). The document type is limited to the same value as the supporting SEC submission type, or the word 'Other'.</p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;"><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">dei_DocumentType</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>dei_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>dei:submissionTypeItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_dei_EntityCentralIndexKey">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div><p>A unique 10-digit SEC-issued value to identify entities that have filed disclosures with the SEC. It is commonly abbreviated as CIK.</p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br> -Publisher SEC<br> -Name Regulation 12B<br> -Number 240<br> -Section 12<br> -Subsection b-2<br></p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">dei_EntityCentralIndexKey</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>dei_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>dei:centralIndexKeyItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_dei_EntityCommonStockSharesOutstanding">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div><p>Indicate number of shares or other units outstanding of each of registrant's classes of capital or common stock or other ownership interests, if and as stated on cover of related periodic report. Where multiple classes or units exist define each class/interest by adding class of stock items such as Common Class A [Member], Common Class B [Member] or Partnership Interest [Member] onto the Instrument [Domain] of the Entity Listings, Instrument.</p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;"><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">dei_EntityCommonStockSharesOutstanding</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>dei_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:sharesItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>instant</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_dei_EntityCurrentReportingStatus">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div><p>Indicate 'Yes' or 'No' whether registrants (1) have filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that registrants were required to file such reports), and (2) have been subject to such filing requirements for the past 90 days. This information should be based on the registrant's current or most recent filing containing the related disclosure.</p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;"><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">dei_EntityCurrentReportingStatus</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>dei_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>dei:yesNoItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_dei_EntityFilerCategory">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div><p>Indicate whether the registrant is one of the following: (1) Large Accelerated Filer, (2) Accelerated Filer, (3) Non-accelerated Filer, (4) Smaller Reporting Company (Non-accelerated) (5) Smaller Reporting Accelerated Filer, (6) Smaller Reporting Emerging Growth Company Filer (7) Non-accelerated Emerging Growth Company Filer or (8) Accelerated Emerging Growth Company Filer. Definitions of these categories are stated in Rule 12b-2 of the Exchange Act. This information should be based on the registrant's current or most recent filing containing the related disclosure.</p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br> -Publisher SEC<br> -Name Regulation 12B<br> -Number 240<br> -Section 12<br> -Subsection b-2<br></p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">dei_EntityFilerCategory</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>dei_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>dei:filerCategoryItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_dei_EntityRegistrantName">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div><p>The exact name of the entity filing the report as specified in its charter, which is required by forms filed with the SEC.</p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br> -Publisher SEC<br> -Name Regulation 12B<br> -Number 240<br> -Section 12<br> -Subsection b-2<br></p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">dei_EntityRegistrantName</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>dei_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:normalizedStringItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_dei_EntityVoluntaryFilers">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div><p>Indicate 'Yes' or 'No' if the registrant is not required to file reports pursuant to Section 13 or Section 15(d) of the Act.</p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;"><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">dei_EntityVoluntaryFilers</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>dei_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>dei:yesNoItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
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<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_dei_EntityWellKnownSeasonedIssuer">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div><p>Indicate 'Yes' or 'No' if the registrant is a well-known seasoned issuer, as defined in Rule 405 of the Securities Act. Is used on Form Type: 10-K, 10-Q, 8-K, 20-F, 6-K, 10-K/A, 10-Q/A, 20-F/A, 6-K/A, N-CSR, N-Q, N-1A.</p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;"><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">dei_EntityWellKnownSeasonedIssuer</td>
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<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>dei_</td>
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<td><strong> Data Type:</strong></td>
<td>dei:yesNoItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
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<span style="display: none;">v3.8.0.1</span><table class="report" border="0" cellspacing="2" id="idp6805107136">
<tr>
<th class="tl" colspan="1" rowspan="1"><div style="width: 200px;"><strong>Consolidated Balance Sheets - USD ($)<br> $ in Thousands</strong></div></th>
<th class="th"><div>Mar. 31, 2018</div></th>
<th class="th"><div>Dec. 31, 2017</div></th>
</tr>
<tr class="re">
<td class="pl " style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_AssetsCurrentAbstract', window );"><strong>Current assets:</strong></a></td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl " style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_CashAndCashEquivalentsAtCarryingValue', window );">Cash and cash equivalents</a></td>
<td class="nump">$ 97<span></span>
</td>
<td class="nump">$ 214<span></span>
</td>
</tr>
<tr class="re">
<td class="pl " style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_ShortTermInvestments', window );">Short-term investments</a></td>
<td class="nump">11,223<span></span>
</td>
<td class="nump">11,642<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl " style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_AvailableForSaleSecuritiesCurrent', window );">Investments in marketable equity securities, at fair value</a></td>
<td class="nump">2,202<span></span>
</td>
<td class="nump">2,643<span></span>
</td>
</tr>
<tr class="re">
<td class="pl " style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_PrepaidExpenseAndOtherAssetsCurrent', window );">Prepaid expenses and other</a></td>
<td class="nump">93<span></span>
</td>
<td class="nump">114<span></span>
</td>
</tr>
<tr class="rou">
<td class="pl " style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_AssetsCurrent', window );">Total current assets</a></td>
<td class="nump">13,615<span></span>
</td>
<td class="nump">14,613<span></span>
</td>
</tr>
<tr class="re">
<td class="pl " style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_MineralPropertiesNet', window );">Mineral properties</a></td>
<td class="nump">15,657<span></span>
</td>
<td class="nump">15,657<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl " style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_OtherAssetsNoncurrent', window );">Other assets</a></td>
<td class="nump">127<span></span>
</td>
<td class="nump">125<span></span>
</td>
</tr>
<tr class="re">
<td class="pl " style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_PrepaidExpenseAndOtherAssets', window );">Total assets</a></td>
<td class="nump">29,399<span></span>
</td>
<td class="nump">30,395<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl " style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_LiabilitiesCurrentAbstract', window );"><strong>Current liabilities:</strong></a></td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="re">
<td class="pl " style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_AccruedLiabilitiesCurrent', window );">Accounts payable</a></td>
<td class="nump">165<span></span>
</td>
<td class="nump">141<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl " style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_LiabilitiesCurrent', window );">Total current liabilities</a></td>
<td class="nump">165<span></span>
</td>
<td class="nump">141<span></span>
</td>
</tr>
<tr class="re">
<td class="pl " style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_LiabilitiesOtherThanLongTermDebtNoncurrentAbstract', window );"><strong>Long-term liabilities</strong></a></td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl " style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_MineReclamationAndClosingLiabilityNoncurrent', window );">Asset retirement obligation &#8211; Lik</a></td>
<td class="nump">125<span></span>
</td>
<td class="nump">125<span></span>
</td>
</tr>
<tr class="re">
<td class="pl " style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_StockholdersEquityAbstract', window );"><strong>Shareholders&#8217; equity:</strong></a></td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl " style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_PreferredStockValue', window );">Preferred stock, $0.01 par value, authorized 10,000,000 shares (none issued and outstanding at March 31, 2018 and December 31, 2017)</a></td>
<td class="text"> <span></span>
</td>
<td class="text"> <span></span>
</td>
</tr>
<tr class="re">
<td class="pl " style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_CommonStockValue', window );">Common stock, $0.01 par value, authorized 100,000,000 shares (58,381,952 and 58,434,566 shares, respectively, issued and outstanding at March 31, 2018 and December 31, 2017)</a></td>
<td class="nump">584<span></span>
</td>
<td class="nump">584<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl " style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_AdditionalPaidInCapital', window );">Additional paid-in capital</a></td>
<td class="nump">69,296<span></span>
</td>
<td class="nump">69,312<span></span>
</td>
</tr>
<tr class="re">
<td class="pl " style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_RetainedEarningsAccumulatedDeficit', window );">Accumulated deficit</a></td>
<td class="num">(40,771)<span></span>
</td>
<td class="num">(39,767)<span></span>
</td>
</tr>
<tr class="rou">
<td class="pl " style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest', window );">Total shareholders&#8217; equity</a></td>
<td class="nump">29,109<span></span>
</td>
<td class="nump">30,129<span></span>
</td>
</tr>
<tr class="reu">
<td class="pl " style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_LiabilitiesAndStockholdersEquity', window );">Total liabilities and shareholders&#8217; equity</a></td>
<td class="nump">$ 29,399<span></span>
</td>
<td class="nump">$ 30,395<span></span>
</td>
</tr>
</table>
<div style="display: none;">
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_AccruedLiabilitiesCurrent">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div><p>Carrying value as of the balance sheet date of obligations incurred and payable, pertaining to costs that are statutory in nature, are incurred on contractual obligations, or accumulate over time and for which invoices have not yet been received or will not be rendered. Examples include taxes, interest, rent and utilities. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).</p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 210<br> -SubTopic 10<br> -Section S99<br> -Paragraph 1<br> -Subparagraph (SX 210.5-02.20)<br> -URI http://asc.fasb.org/extlink&amp;oid=6877327&amp;loc=d3e13212-122682<br></p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_AccruedLiabilitiesCurrent</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>us-gaap_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:monetaryItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>credit</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>instant</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_AdditionalPaidInCapital">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div><p>Excess of issue price over par or stated value of the entity's capital stock and amounts received from other transactions involving the entity's stock or stockholders. Includes adjustments to additional paid in capital. Some examples of such adjustments include recording the issuance of debt with a beneficial conversion feature and certain tax consequences of equity instruments awarded to employees. Use this element for the aggregate amount of additional paid-in capital associated with common and preferred stock. For additional paid-in capital associated with only common stock, use the element additional paid in capital, common stock. For additional paid-in capital associated with only preferred stock, use the element additional paid in capital, preferred stock.</p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 210<br> -SubTopic 10<br> -Section S99<br> -Paragraph 1<br> -Subparagraph (SX 210.5-02(30)(a)(1))<br> -URI http://asc.fasb.org/extlink&amp;oid=6877327&amp;loc=d3e13212-122682<br></p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_AdditionalPaidInCapital</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>us-gaap_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:monetaryItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>credit</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>instant</td>
</tr>
</table></div>
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</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_AssetsCurrent">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div><p>Sum of the carrying amounts as of the balance sheet date of all assets that are expected to be realized in cash, sold, or consumed within one year (or the normal operating cycle, if longer). Assets are probable future economic benefits obtained or controlled by an entity as a result of past transactions or events.</p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 210<br> -SubTopic 10<br> -Section 45<br> -Paragraph 3<br> -URI http://asc.fasb.org/extlink&amp;oid=82887183&amp;loc=d3e6801-107765<br><br>Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 210<br> -SubTopic 10<br> -Section S99<br> -Paragraph 1<br> -Subparagraph (SX 210.5-02.9)<br> -URI http://asc.fasb.org/extlink&amp;oid=6877327&amp;loc=d3e13212-122682<br><br>Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 210<br> -SubTopic 10<br> -Section 45<br> -Paragraph 1<br> -URI http://asc.fasb.org/extlink&amp;oid=82887183&amp;loc=d3e6676-107765<br></p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_AssetsCurrent</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>us-gaap_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:monetaryItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>debit</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>instant</td>
</tr>
</table></div>
</div></td></tr>
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<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_AssetsCurrentAbstract">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- References</a><div><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_AssetsCurrentAbstract</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>us-gaap_</td>
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<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:stringItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
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<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
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<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_AvailableForSaleSecuritiesCurrent">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div><p>Amount of investment in debt and equity securities categorized neither as trading securities nor held-to-maturity securities and intended be sold or mature one year or operating cycle, if longer.</p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;"><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_AvailableForSaleSecuritiesCurrent</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>us-gaap_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:monetaryItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>debit</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>instant</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_CashAndCashEquivalentsAtCarryingValue">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div><p>Amount of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. Excludes cash and cash equivalents within disposal group and discontinued operation.</p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 230<br> -SubTopic 10<br> -Section 45<br> -Paragraph 4<br> -URI http://asc.fasb.org/extlink&amp;oid=109223946&amp;loc=d3e3044-108585<br><br>Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 210<br> -SubTopic 10<br> -Section 45<br> -Paragraph 1<br> -Subparagraph (a)<br> -URI http://asc.fasb.org/extlink&amp;oid=82887183&amp;loc=d3e6676-107765<br><br>Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 210<br> -SubTopic 10<br> -Section S99<br> -Paragraph 1<br> -Subparagraph (SX 210.5-02.1)<br> -URI http://asc.fasb.org/extlink&amp;oid=6877327&amp;loc=d3e13212-122682<br></p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_CashAndCashEquivalentsAtCarryingValue</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>us-gaap_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:monetaryItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>debit</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>instant</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_CommonStockValue">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div><p>Aggregate par or stated value of issued nonredeemable common stock (or common stock redeemable solely at the option of the issuer). This item includes treasury stock repurchased by the entity. Note: elements for number of nonredeemable common shares, par value and other disclosure concepts are in another section within stockholders' equity.</p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 210<br> -SubTopic 10<br> -Section S99<br> -Paragraph 1<br> -Subparagraph (SX 210.5-02(29))<br> -URI http://asc.fasb.org/extlink&amp;oid=6877327&amp;loc=d3e13212-122682<br></p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_CommonStockValue</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>us-gaap_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:monetaryItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>credit</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>instant</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_LiabilitiesAndStockholdersEquity">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div><p>Amount of liabilities and equity items, including the portion of equity attributable to noncontrolling interests, if any.</p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 942<br> -SubTopic 210<br> -Section S99<br> -Paragraph 1<br> -Subparagraph (SX 210.9-03(23))<br> -URI http://asc.fasb.org/extlink&amp;oid=6876686&amp;loc=d3e534808-122878<br><br>Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 944<br> -SubTopic 210<br> -Section S99<br> -Paragraph 1<br> -Subparagraph (SX 210.7-03(a)(25))<br> -URI http://asc.fasb.org/extlink&amp;oid=6879938&amp;loc=d3e572229-122910<br><br>Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 210<br> -SubTopic 10<br> -Section S99<br> -Paragraph 1<br> -Subparagraph (SX 210.5-02(32))<br> -URI http://asc.fasb.org/extlink&amp;oid=6877327&amp;loc=d3e13212-122682<br></p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_LiabilitiesAndStockholdersEquity</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>us-gaap_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:monetaryItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>credit</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>instant</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_LiabilitiesCurrent">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div><p>Total obligations incurred as part of normal operations that are expected to be paid during the following twelve months or within one business cycle, if longer.</p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 210<br> -SubTopic 10<br> -Section S99<br> -Paragraph 1<br> -Subparagraph (SX 210.5-02.21)<br> -URI http://asc.fasb.org/extlink&amp;oid=6877327&amp;loc=d3e13212-122682<br></p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_LiabilitiesCurrent</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>us-gaap_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:monetaryItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>credit</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>instant</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_LiabilitiesCurrentAbstract">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- References</a><div><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_LiabilitiesCurrentAbstract</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>us-gaap_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:stringItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_LiabilitiesOtherThanLongTermDebtNoncurrentAbstract">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- References</a><div><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_LiabilitiesOtherThanLongTermDebtNoncurrentAbstract</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>us-gaap_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:stringItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_MineReclamationAndClosingLiabilityNoncurrent">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div><p>Amount of a reclamation and mine closing liability that is associated with a legal obligation for the closure and reclamation of a mine including the removal of buildings, equipment, machinery and other physical remnants of mining, closure of tailings impoundments, leach pads and other mine features, and contouring, covering and revegetation of waste rock piles and other disturbed areas.</p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 450<br> -SubTopic 20<br> -Section S99<br> -Paragraph 1<br> -Subparagraph (SAB TOPIC 5.Y.Q2)<br> -URI http://asc.fasb.org/extlink&amp;oid=27011672&amp;loc=d3e149879-122751<br></p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_MineReclamationAndClosingLiabilityNoncurrent</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>us-gaap_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:monetaryItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>credit</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>instant</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_MineralPropertiesNet">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div><p>Mineral properties, net of adjustments.</p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 932<br> -SubTopic 360<br> -Section 25<br> -Paragraph 7<br> -URI http://asc.fasb.org/extlink&amp;oid=96866604&amp;loc=d3e64895-109465<br><br>Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 360<br> -SubTopic 10<br> -Section 50<br> -Paragraph 1<br> -URI http://asc.fasb.org/extlink&amp;oid=6391035&amp;loc=d3e2868-110229<br></p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_MineralPropertiesNet</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>us-gaap_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:monetaryItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>debit</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>instant</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_OtherAssetsNoncurrent">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div><p>Amount of noncurrent assets classified as other.</p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 210<br> -SubTopic 10<br> -Section S99<br> -Paragraph 1<br> -Subparagraph (SX 210.5-02.17)<br> -URI http://asc.fasb.org/extlink&amp;oid=6877327&amp;loc=d3e13212-122682<br></p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_OtherAssetsNoncurrent</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>us-gaap_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:monetaryItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>debit</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>instant</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_PreferredStockValue">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div><p>Aggregate par or stated value of issued nonredeemable preferred stock (or preferred stock redeemable solely at the option of the issuer). This item includes treasury stock repurchased by the entity. Note: elements for number of nonredeemable preferred shares, par value and other disclosure concepts are in another section within stockholders' equity.</p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 210<br> -SubTopic 10<br> -Section S99<br> -Paragraph 1<br> -Subparagraph (SX 210.5-02(28))<br> -URI http://asc.fasb.org/extlink&amp;oid=6877327&amp;loc=d3e13212-122682<br></p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_PreferredStockValue</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>us-gaap_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:monetaryItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>credit</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>instant</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_PrepaidExpenseAndOtherAssets">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div><p>Amount of asset related to consideration paid in advance for costs that provide economic benefits in future periods, and amount of other assets.</p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;"><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_PrepaidExpenseAndOtherAssets</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>us-gaap_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:monetaryItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>debit</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>instant</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_PrepaidExpenseAndOtherAssetsCurrent">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div><p>Amount of asset related to consideration paid in advance for costs that provide economic benefits in future periods, and amount of other assets that are expected to be realized or consumed within one year or the normal operating cycle, if longer.</p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 210<br> -SubTopic 10<br> -Section S99<br> -Paragraph 1<br> -Subparagraph (SX 210.5-02(7))<br> -URI http://asc.fasb.org/extlink&amp;oid=6877327&amp;loc=d3e13212-122682<br><br>Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 210<br> -SubTopic 10<br> -Section 45<br> -Paragraph 1<br> -URI http://asc.fasb.org/extlink&amp;oid=82887183&amp;loc=d3e6676-107765<br><br>Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 210<br> -SubTopic 10<br> -Section S99<br> -Paragraph 1<br> -Subparagraph (SX 210.5-02(8))<br> -URI http://asc.fasb.org/extlink&amp;oid=6877327&amp;loc=d3e13212-122682<br></p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_PrepaidExpenseAndOtherAssetsCurrent</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>us-gaap_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:monetaryItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>debit</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>instant</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_RetainedEarningsAccumulatedDeficit">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div><p>The cumulative amount of the reporting entity's undistributed earnings or deficit.</p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 210<br> -SubTopic 10<br> -Section S99<br> -Paragraph 1<br> -Subparagraph (SX 210.5-02(30)(a)(3))<br> -URI http://asc.fasb.org/extlink&amp;oid=6877327&amp;loc=d3e13212-122682<br><br>Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 944<br> -SubTopic 210<br> -Section S99<br> -Paragraph 1<br> -Subparagraph (SX 210.7-03(a)(23)(a)(4))<br> -URI http://asc.fasb.org/extlink&amp;oid=6879938&amp;loc=d3e572229-122910<br><br>Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 505<br> -SubTopic 10<br> -Section S99<br> -Paragraph 1<br> -Subparagraph (SX 210.3-04)<br> -URI http://asc.fasb.org/extlink&amp;oid=27012166&amp;loc=d3e187085-122770<br></p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_RetainedEarningsAccumulatedDeficit</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>us-gaap_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:monetaryItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>credit</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>instant</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_ShortTermInvestments">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div><p>Amount of investments including trading securities, available-for-sale securities, held-to-maturity securities, and short-term investments classified as other and current.</p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 942<br> -SubTopic 210<br> -Section S99<br> -Paragraph 1<br> -Subparagraph (SX 210.9-03(4))<br> -URI http://asc.fasb.org/extlink&amp;oid=6876686&amp;loc=d3e534808-122878<br><br>Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 942<br> -SubTopic 210<br> -Section S99<br> -Paragraph 1<br> -Subparagraph (SX 210.9-03(6))<br> -URI http://asc.fasb.org/extlink&amp;oid=6876686&amp;loc=d3e534808-122878<br><br>Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 942<br> -SubTopic 210<br> -Section S99<br> -Paragraph 1<br> -Subparagraph (SX 210.9-03(5))<br> -URI http://asc.fasb.org/extlink&amp;oid=6876686&amp;loc=d3e534808-122878<br><br>Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 944<br> -SubTopic 210<br> -Section S99<br> -Paragraph 1<br> -Subparagraph (SX 210.7-03(a)(1)(g))<br> -URI http://asc.fasb.org/extlink&amp;oid=6879938&amp;loc=d3e572229-122910<br><br>Reference 5: http://fasb.org/us-gaap/role/ref/legacyRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 210<br> -SubTopic 10<br> -Section S99<br> -Paragraph 1<br> -Subparagraph (SX 210.5-02(2))<br> -URI http://asc.fasb.org/extlink&amp;oid=6877327&amp;loc=d3e13212-122682<br></p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_ShortTermInvestments</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
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<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:monetaryItemType</td>
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<tr>
<td><strong> Balance Type:</strong></td>
<td>debit</td>
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<tr>
<td><strong> Period Type:</strong></td>
<td>instant</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_StockholdersEquityAbstract">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- References</a><div><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_StockholdersEquityAbstract</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>us-gaap_</td>
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<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:stringItemType</td>
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<td><strong> Balance Type:</strong></td>
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<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div><p>Amount of stockholders' equity (deficit), net of receivables from officers, directors, owners, and affiliates of the entity, attributable to both the parent and noncontrolling interests. Amount excludes temporary equity. Alternate caption for the concept is permanent equity.</p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 810<br> -SubTopic 10<br> -Section 45<br> -Paragraph 16<br> -URI http://asc.fasb.org/extlink&amp;oid=108774443&amp;loc=SL4568740-111683<br><br>Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 810<br> -SubTopic 10<br> -Section 55<br> -Paragraph 4I<br> -URI http://asc.fasb.org/extlink&amp;oid=84234705&amp;loc=SL4590271-111686<br><br>Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 810<br> -SubTopic 10<br> -Section 45<br> -Paragraph 15<br> -URI http://asc.fasb.org/extlink&amp;oid=108774443&amp;loc=SL4568447-111683<br></p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>us-gaap_</td>
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<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:monetaryItemType</td>
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<tr>
<td><strong> Balance Type:</strong></td>
<td>credit</td>
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<span style="display: none;">v3.8.0.1</span><table class="report" border="0" cellspacing="2" id="idp6805230176">
<tr>
<th class="tl" colspan="1" rowspan="1"><div style="width: 200px;"><strong>Consolidated Balance Sheets (Parenthetical) - $ / shares<br></strong></div></th>
<th class="th"><div>Mar. 31, 2018</div></th>
<th class="th"><div>Dec. 31, 2017</div></th>
</tr>
<tr class="re">
<td class="pl " style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_PreferredStockNumberOfSharesParValueAndOtherDisclosuresAbstract', window );"><strong>Preferred stock</strong></a></td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
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<td class="pl " style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_PreferredStockParOrStatedValuePerShare', window );">Preferred stock, par value</a></td>
<td class="nump">$ .01<span></span>
</td>
<td class="nump">$ .01<span></span>
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<td class="pl " style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_PreferredStockSharesAuthorized', window );">Preferred stock, shares authorized</a></td>
<td class="nump">10,000,000<span></span>
</td>
<td class="nump">10,000,000<span></span>
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<tr class="ro">
<td class="pl " style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_CommonStockNumberOfSharesParValueAndOtherDisclosuresAbstract', window );"><strong>Common stock</strong></a></td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
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<tr class="re">
<td class="pl " style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_CommonStockParOrStatedValuePerShare', window );">Common stock, par value</a></td>
<td class="nump">$ .01<span></span>
</td>
<td class="nump">$ .01<span></span>
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<tr class="ro">
<td class="pl " style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_CommonStockSharesAuthorized', window );">Common stock, shares authorized</a></td>
<td class="nump">100,000,000<span></span>
</td>
<td class="nump">100,000,000<span></span>
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<tr class="re">
<td class="pl " style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_CommonStockSharesIssued', window );">Common stock, shares issued</a></td>
<td class="nump">58,381,952<span></span>
</td>
<td class="nump">58,434,566<span></span>
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</tr>
<tr class="ro">
<td class="pl " style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_CommonStockSharesOutstanding', window );">Common stock, shares outstanding</a></td>
<td class="nump">58,381,952<span></span>
</td>
<td class="nump">58,434,566<span></span>
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</tr>
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<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_CommonStockNumberOfSharesParValueAndOtherDisclosuresAbstract">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- References</a><div><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_CommonStockNumberOfSharesParValueAndOtherDisclosuresAbstract</td>
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<td>xbrli:stringItemType</td>
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<td>na</td>
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<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_CommonStockParOrStatedValuePerShare">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div><p>Face amount or stated value per share of common stock.</p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 210<br> -SubTopic 10<br> -Section S99<br> -Paragraph 1<br> -Subparagraph (SX 210.5-02(29))<br> -URI http://asc.fasb.org/extlink&amp;oid=6877327&amp;loc=d3e13212-122682<br></p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_CommonStockParOrStatedValuePerShare</td>
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<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>us-gaap_</td>
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<td><strong> Data Type:</strong></td>
<td>num:perShareItemType</td>
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<td><strong> Balance Type:</strong></td>
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<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div><p>The maximum number of common shares permitted to be issued by an entity's charter and bylaws.</p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 210<br> -SubTopic 10<br> -Section S99<br> -Paragraph 1<br> -Subparagraph (SX 210.5-02(29))<br> -URI http://asc.fasb.org/extlink&amp;oid=6877327&amp;loc=d3e13212-122682<br></p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_CommonStockSharesAuthorized</td>
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<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>us-gaap_</td>
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<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:sharesItemType</td>
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<td><strong> Balance Type:</strong></td>
<td>na</td>
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<tr>
<td><strong> Period Type:</strong></td>
<td>instant</td>
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</table></div>
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<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_CommonStockSharesIssued">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div><p>Total number of common shares of an entity that have been sold or granted to shareholders (includes common shares that were issued, repurchased and remain in the treasury). These shares represent capital invested by the firm's shareholders and owners, and may be all or only a portion of the number of shares authorized. Shares issued include shares outstanding and shares held in the treasury.</p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 210<br> -SubTopic 10<br> -Section S99<br> -Paragraph 1<br> -Subparagraph (SX 210.5-02(29))<br> -URI http://asc.fasb.org/extlink&amp;oid=6877327&amp;loc=d3e13212-122682<br></p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_CommonStockSharesIssued</td>
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<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>us-gaap_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:sharesItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
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<tr>
<td><strong> Period Type:</strong></td>
<td>instant</td>
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<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_CommonStockSharesOutstanding">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div><p>Number of shares of common stock outstanding. Common stock represent the ownership interest in a corporation.</p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 505<br> -SubTopic 10<br> -Section 50<br> -Paragraph 2<br> -URI http://asc.fasb.org/extlink&amp;oid=109259400&amp;loc=d3e21463-112644<br><br>Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 210<br> -SubTopic 10<br> -Section S99<br> -Paragraph 1<br> -Subparagraph (SX 210.5-02(29))<br> -URI http://asc.fasb.org/extlink&amp;oid=6877327&amp;loc=d3e13212-122682<br></p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
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<td>instant</td>
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<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- References</a><div><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_PreferredStockNumberOfSharesParValueAndOtherDisclosuresAbstract</td>
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<td><strong> Balance Type:</strong></td>
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<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_PreferredStockParOrStatedValuePerShare">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div><p>Face amount or stated value per share of preferred stock nonredeemable or redeemable solely at the option of the issuer.</p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 210<br> -SubTopic 10<br> -Section S99<br> -Paragraph 1<br> -Subparagraph (SX 210.5-02(28))<br> -URI http://asc.fasb.org/extlink&amp;oid=6877327&amp;loc=d3e13212-122682<br></p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_PreferredStockParOrStatedValuePerShare</td>
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<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>us-gaap_</td>
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<tr>
<td><strong> Data Type:</strong></td>
<td>num:perShareItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>instant</td>
</tr>
</table></div>
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<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div><p>The maximum number of nonredeemable preferred shares (or preferred stock redeemable solely at the option of the issuer) permitted to be issued by an entity's charter and bylaws.</p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 210<br> -SubTopic 10<br> -Section S99<br> -Paragraph 1<br> -Subparagraph (SX 210.5-02(28))<br> -URI http://asc.fasb.org/extlink&amp;oid=6877327&amp;loc=d3e13212-122682<br></p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_PreferredStockSharesAuthorized</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>us-gaap_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:sharesItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>instant</td>
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</table></div>
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<span style="display: none;">v3.8.0.1</span><table class="report" border="0" cellspacing="2" id="idp6805170800">
<tr>
<th class="tl" colspan="1" rowspan="2"><div style="width: 200px;"><strong>Consolidated Statements of Operations - USD ($)<br> $ in Thousands</strong></div></th>
<th class="th" colspan="2">3 Months Ended</th>
</tr>
<tr>
<th class="th"><div>Mar. 31, 2018</div></th>
<th class="th"><div>Mar. 31, 2017</div></th>
</tr>
<tr class="re">
<td class="pl " style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_CostsAndExpensesAbstract', window );"><strong>Costs, expenses and other:</strong></a></td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl " style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_ExplorationExpenseMining', window );">Exploration expense</a></td>
<td class="nump">$ 180<span></span>
</td>
<td class="nump">$ 151<span></span>
</td>
</tr>
<tr class="re">
<td class="pl " style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_DepreciationAndAmortization', window );">Depreciation and amortization</a></td>
<td class="nump">6<span></span>
</td>
<td class="nump">1<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl " style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_GeneralAndAdministrativeExpense', window );">General and administrative</a></td>
<td class="nump">403<span></span>
</td>
<td class="nump">300<span></span>
</td>
</tr>
<tr class="reu">
<td class="pl " style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_OtherCostAndExpenseOperating', window );">Total costs, expenses and other</a></td>
<td class="nump">589<span></span>
</td>
<td class="nump">452<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl " style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_InterestIncomeExpenseNet', window );">Interest income (net)</a></td>
<td class="nump">26<span></span>
</td>
<td class="nump">46<span></span>
</td>
</tr>
<tr class="re">
<td class="pl " style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_UnrealizedGainLossOnMarketableSecuritiesCostMethodInvestmentsAndOtherInvestments', window );">Unrealized (loss) gain on marketable equity securities</a></td>
<td class="num">(441)<span></span>
</td>
<td class="nump">128<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl " style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_GainLossOnDerivativeInstrumentsHeldForTradingPurposesNet', window );">Gain on derivative instruments</a></td>
<td class="text"> <span></span>
</td>
<td class="nump">172<span></span>
</td>
</tr>
<tr class="reu">
<td class="pl " style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_OtherNonrecurringIncomeExpense', window );">Total other (loss) income</a></td>
<td class="num">$ (415)<span></span>
</td>
<td class="nump">346<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl " style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_NetIncomeLoss', window );">Net loss</a></td>
<td class="text">&#160;<span></span>
</td>
<td class="num">$ (106)<span></span>
</td>
</tr>
<tr class="re">
<td class="pl " style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_EarningsPerShareBasicAndDiluted', window );">Basic and diluted</a></td>
<td class="num">$ (0.02)<span></span>
</td>
<td class="nump">$ (0.00)<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl " style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_WeightedAverageNumberOfSharesOutstandingAbstract', window );"><strong>Weighted average shares outstanding:</strong></a></td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="re">
<td class="pl " style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_WeightedAverageNumberOfShareOutstandingBasicAndDiluted', window );">Basic and diluted</a></td>
<td class="nump">58,444<span></span>
</td>
<td class="nump">38,692<span></span>
</td>
</tr>
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<div style="display: none;">
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<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- References</a><div><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_CostsAndExpensesAbstract</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>us-gaap_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:stringItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_DepreciationAndAmortization">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div><p>The current period expense charged against earnings on long-lived, physical assets not used in production, and which are not intended for resale, to allocate or recognize the cost of such assets over their useful lives; or to record the reduction in book value of an intangible asset over the benefit period of such asset; or to reflect consumption during the period of an asset that is not used in production.</p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 360<br> -SubTopic 10<br> -Section 50<br> -Paragraph 1<br> -Subparagraph (a)<br> -URI http://asc.fasb.org/extlink&amp;oid=6391035&amp;loc=d3e2868-110229<br><br>Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 230<br> -SubTopic 10<br> -Section 45<br> -Paragraph 28<br> -Subparagraph (b)<br> -URI http://asc.fasb.org/extlink&amp;oid=109223946&amp;loc=d3e3602-108585<br></p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_DepreciationAndAmortization</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>us-gaap_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:monetaryItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>debit</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_EarningsPerShareBasicAndDiluted">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div><p>The amount of net income or loss for the period per each share in instances when basic and diluted earnings per share are the same amount and reported as a single line item on the face of the financial statements.  Basic earnings per share is the amount of net income or loss for the period per each share of common stock or unit outstanding during the reporting period.  Diluted earnings per share includes the amount of net income or loss for the period available to each share of common stock or common unit outstanding during the reporting period and to each share or unit that would have been outstanding assuming the issuance of common shares or units for all dilutive potential common shares or units outstanding during the reporting period.</p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 260<br> -SubTopic 10<br> -Section 45<br> -Paragraph 7<br> -URI http://asc.fasb.org/extlink&amp;oid=109260490&amp;loc=d3e1337-109256<br></p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_EarningsPerShareBasicAndDiluted</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>us-gaap_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>num:perShareItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_ExplorationExpenseMining">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div><p>Exploration expenses (including prospecting) related to the mining industry would be included in operating expenses. Exploration costs include costs incurred in identifying areas that may warrant examination and in examining specific areas that are considered to have prospects of mineral reserves.</p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;"><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_ExplorationExpenseMining</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>us-gaap_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:monetaryItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>debit</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_GainLossOnDerivativeInstrumentsHeldForTradingPurposesNet">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div><p>Aggregate net gain and losses (whether realized or unrealized) on all derivative instruments held for trading purposes whether or not settled physically.</p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 815<br> -SubTopic 10<br> -Section 50<br> -Paragraph 4F<br> -URI http://asc.fasb.org/extlink&amp;oid=109980867&amp;loc=SL5624186-113959<br><br>Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 815<br> -SubTopic 10<br> -Section 45<br> -Paragraph 9<br> -URI http://asc.fasb.org/extlink&amp;oid=6945355&amp;loc=d3e41322-113958<br></p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_GainLossOnDerivativeInstrumentsHeldForTradingPurposesNet</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>us-gaap_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:monetaryItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>credit</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_GeneralAndAdministrativeExpense">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div><p>The aggregate total of expenses of managing and administering the affairs of an entity, including affiliates of the reporting entity, which are not directly or indirectly associated with the manufacture, sale or creation of a product or product line.</p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 220<br> -SubTopic 10<br> -Section S99<br> -Paragraph 2<br> -Subparagraph (SX 210.5-03.4)<br> -URI http://asc.fasb.org/extlink&amp;oid=115205541&amp;loc=SL114868664-224227<br></p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_GeneralAndAdministrativeExpense</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>us-gaap_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:monetaryItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>debit</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_InterestIncomeExpenseNet">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div><p>The net amount of operating interest income (expense).</p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 942<br> -SubTopic 220<br> -Section S99<br> -Paragraph 1<br> -Subparagraph (SX 210.9-04.10)<br> -URI http://asc.fasb.org/extlink&amp;oid=114873765&amp;loc=SL114874048-224260<br></p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_InterestIncomeExpenseNet</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>us-gaap_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:monetaryItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>credit</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_NetIncomeLoss">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div><p>The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.</p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://www.xbrl.org/2003/role/disclosureRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 220<br> -SubTopic 10<br> -Section 45<br> -Paragraph 1A<br> -Subparagraph (a)<br> -URI http://asc.fasb.org/extlink&amp;oid=114867106&amp;loc=SL7669619-108580<br><br>Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 942<br> -SubTopic 220<br> -Section S99<br> -Paragraph 1<br> -Subparagraph (SX 210.9-04(22))<br> -URI http://asc.fasb.org/extlink&amp;oid=114873765&amp;loc=SL114874048-224260<br><br>Reference 3: http://www.xbrl.org/2003/role/disclosureRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 220<br> -SubTopic 10<br> -Section 45<br> -Paragraph 1B<br> -Subparagraph (a)<br> -URI http://asc.fasb.org/extlink&amp;oid=114867106&amp;loc=SL7669625-108580<br><br>Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 944<br> -SubTopic 220<br> -Section S99<br> -Paragraph 1<br> -Subparagraph (SX 210.7-04(18))<br> -URI http://asc.fasb.org/extlink&amp;oid=114873790&amp;loc=SL114874131-224263<br><br>Reference 5: http://fasb.org/us-gaap/role/ref/legacyRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 220<br> -SubTopic 10<br> -Section S99<br> -Paragraph 2<br> -Subparagraph (SX 210.5-03(20))<br> -URI http://asc.fasb.org/extlink&amp;oid=115205541&amp;loc=SL114868664-224227<br><br>Reference 6: http://fasb.org/us-gaap/role/ref/legacyRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 230<br> -SubTopic 10<br> -Section 45<br> -Paragraph 28<br> -URI http://asc.fasb.org/extlink&amp;oid=109223946&amp;loc=d3e3602-108585<br><br>Reference 7: http://fasb.org/us-gaap/role/ref/legacyRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 260<br> -SubTopic 10<br> -Section 50<br> -Paragraph 1<br> -URI http://asc.fasb.org/extlink&amp;oid=6371337&amp;loc=d3e3550-109257<br></p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_NetIncomeLoss</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>us-gaap_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:monetaryItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>credit</td>
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<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_OtherCostAndExpenseOperating">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div><p>The total amount of other operating cost and expense items that are associated with the entity's normal revenue producing operation.</p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 220<br> -SubTopic 10<br> -Section S99<br> -Paragraph 2<br> -Subparagraph (SX 210.5-03.3)<br> -URI http://asc.fasb.org/extlink&amp;oid=115205541&amp;loc=SL114868664-224227<br></p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_OtherCostAndExpenseOperating</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>us-gaap_</td>
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<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:monetaryItemType</td>
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<td><strong> Balance Type:</strong></td>
<td>debit</td>
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<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_OtherNonrecurringIncomeExpense">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div><p>Amount of other expense (income) that is infrequent in occurrence or unusual in nature.</p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 220<br> -SubTopic 20<br> -Section 50<br> -Paragraph 1<br> -URI http://asc.fasb.org/extlink&amp;oid=114868883&amp;loc=SL114871943-224233<br></p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_OtherNonrecurringIncomeExpense</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>us-gaap_</td>
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<td><strong> Data Type:</strong></td>
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<tr>
<td><strong> Balance Type:</strong></td>
<td>debit</td>
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<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_UnrealizedGainLossOnMarketableSecuritiesCostMethodInvestmentsAndOtherInvestments">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div><p>The aggregate net change in the difference between the fair value and the carrying value, or in the comparative fair values, of marketable securities categorized as trading held at each balance sheet date, that was included in earnings for the period, which may have arisen from (a) securities classified as trading, (b) the unrealized holding gain (loss) on held-to-maturity securities transferred to the trading security category, and (c) the cumulative unrealized gain (loss) which was included in other comprehensive income (a separate component of shareholders' equity) on available-for-sale securities transferred to trading securities during the period and/or any unrealized gains or losses on investments that are separately or otherwise not categorized as trading or available-for-sale.</p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;"><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_UnrealizedGainLossOnMarketableSecuritiesCostMethodInvestmentsAndOtherInvestments</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>us-gaap_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:monetaryItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>credit</td>
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<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
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</table></div>
</div></td></tr>
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<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_WeightedAverageNumberOfShareOutstandingBasicAndDiluted">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div><p>Average number of shares or units issued and outstanding that are used in calculating basic and diluted earnings per share (EPS).</p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;"><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_WeightedAverageNumberOfShareOutstandingBasicAndDiluted</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>us-gaap_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:sharesItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
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<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_WeightedAverageNumberOfSharesOutstandingAbstract">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- References</a><div><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_WeightedAverageNumberOfSharesOutstandingAbstract</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>us-gaap_</td>
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<td><strong> Data Type:</strong></td>
<td>xbrli:stringItemType</td>
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<span style="display: none;">v3.8.0.1</span><table class="report" border="0" cellspacing="2" id="idp6803194368">
<tr>
<th class="tl" colspan="1" rowspan="2"><div style="width: 200px;"><strong>Consolidated Statements of Cash Flows - USD ($)<br> $ in Thousands</strong></div></th>
<th class="th" colspan="2">3 Months Ended</th>
</tr>
<tr>
<th class="th"><div>Mar. 31, 2018</div></th>
<th class="th"><div>Mar. 31, 2017</div></th>
</tr>
<tr class="re">
<td class="pl " style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract', window );"><strong>Operating activities:</strong></a></td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl " style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_NetIncomeLoss', window );">Net loss</a></td>
<td class="text">&#160;<span></span>
</td>
<td class="num">$ (106)<span></span>
</td>
</tr>
<tr class="re">
<td class="pl " style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_AdjustmentsNoncashItemsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract', window );"><strong>Adjustments to reconcile net loss to net cash used in operating activities:</strong></a></td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl " style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_DepreciationAndAmortization', window );">Depreciation and amortization</a></td>
<td class="nump">$ 6<span></span>
</td>
<td class="nump">1<span></span>
</td>
</tr>
<tr class="re">
<td class="pl custom" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_XPL_UnrealizedGainLossAvailableForSaleSecurities', window );">Unrealized loss (gain) on sale of marketable equity securities</a></td>
<td class="nump">441<span></span>
</td>
<td class="num">(128)<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl " style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_StockOptionPlanExpense', window );">Employee stock option expense</a></td>
<td class="text">&#160;<span></span>
</td>
<td class="text"> <span></span>
</td>
</tr>
<tr class="re">
<td class="pl " style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_UnrealizedGainLossOnDerivatives', window );">Unrealized (gain) on derivative instruments</a></td>
<td class="text"> <span></span>
</td>
<td class="num">(172)<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl " style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_IncreaseDecreaseInOperatingAssetsAbstract', window );"><strong>Changes in operating assets and liabilities:</strong></a></td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="re">
<td class="pl " style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_IncreaseDecreaseInPrepaidExpense', window );">Prepaid expenses and other current assets</a></td>
<td class="nump">32<span></span>
</td>
<td class="nump">32<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl " style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_IncreaseDecreaseInAccountsPayableAndAccruedLiabilities', window );">Accounts payable and other current liabilities</a></td>
<td class="nump">24<span></span>
</td>
<td class="num">(12)<span></span>
</td>
</tr>
<tr class="re">
<td class="pl " style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_NetCashProvidedByUsedInOperatingActivities', window );">Net cash used in operating activities</a></td>
<td class="num">(491)<span></span>
</td>
<td class="num">(385)<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl " style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract', window );"><strong>Investing activities:</strong></a></td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="re">
<td class="pl " style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_PaymentsToAcquireAvailableForSaleSecuritiesEquity', window );">Sale of short-term investments, net</a></td>
<td class="nump">408<span></span>
</td>
<td class="nump">246<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl " style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_PaymentsToAcquireOtherProductiveAssets', window );">Purchase of other assets</a></td>
<td class="num">(8)<span></span>
</td>
<td class="text"> <span></span>
</td>
</tr>
<tr class="re">
<td class="pl " style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_ProceedsFromSaleAndMaturityOfMarketableSecurities', window );">Proceeds from the sale of marketable equity securities</a></td>
<td class="text"> <span></span>
</td>
<td class="nump">259<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl " style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_PaymentsForProceedsFromAvailableforsaleSecuritiesShortterm', window );">Purchase of marketable equity securities</a></td>
<td class="text"> <span></span>
</td>
<td class="num">(167)<span></span>
</td>
</tr>
<tr class="re">
<td class="pl " style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_ProceedsFromDerivativeInstrumentInvestingActivities', window );">Sale of derivative instruments</a></td>
<td class="text"> <span></span>
</td>
<td class="nump">25<span></span>
</td>
</tr>
<tr class="rou">
<td class="pl " style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_NetCashProvidedByUsedInInvestingActivities', window );">Net cash provided by investing activities</a></td>
<td class="nump">400<span></span>
</td>
<td class="nump">363<span></span>
</td>
</tr>
<tr class="re">
<td class="pl " style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract', window );"><strong>Financing activities:</strong></a></td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl " style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_PaymentsForRepurchaseOfCommonStock', window );">Purchase of common stock for cancellation</a></td>
<td class="num">(26)<span></span>
</td>
<td class="num">(6)<span></span>
</td>
</tr>
<tr class="re">
<td class="pl " style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_NetCashProvidedByUsedInFinancingActivities', window );">Net cash used in financing activities</a></td>
<td class="num">(26)<span></span>
</td>
<td class="num">(6)<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl " style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseExcludingExchangeRateEffect', window );">Net decrease in cash and cash equivalents</a></td>
<td class="num">(117)<span></span>
</td>
<td class="num">(28)<span></span>
</td>
</tr>
<tr class="re">
<td class="pl " style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_CashAndCashEquivalentsAtCarryingValue', window );">Cash and cash equivalents, beginning of period</a></td>
<td class="nump">214<span></span>
</td>
<td class="nump">119<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl " style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_CashAndCashEquivalentsAtCarryingValue', window );">Cash and cash equivalents, end of period</a></td>
<td class="nump">$ 97<span></span>
</td>
<td class="nump">$ 91<span></span>
</td>
</tr>
</table>
<div style="display: none;">
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_XPL_UnrealizedGainLossAvailableForSaleSecurities">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- References</a><div><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">XPL_UnrealizedGainLossAvailableForSaleSecurities</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>XPL_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:monetaryItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>debit</td>
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<tr>
<td><strong> Period Type:</strong></td>
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</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_AdjustmentsNoncashItemsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- References</a><div><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_AdjustmentsNoncashItemsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>us-gaap_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:stringItemType</td>
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<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
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<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_CashAndCashEquivalentsAtCarryingValue">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div><p>Amount of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. Excludes cash and cash equivalents within disposal group and discontinued operation.</p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 230<br> -SubTopic 10<br> -Section 45<br> -Paragraph 4<br> -URI http://asc.fasb.org/extlink&amp;oid=109223946&amp;loc=d3e3044-108585<br><br>Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 210<br> -SubTopic 10<br> -Section 45<br> -Paragraph 1<br> -Subparagraph (a)<br> -URI http://asc.fasb.org/extlink&amp;oid=82887183&amp;loc=d3e6676-107765<br><br>Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 210<br> -SubTopic 10<br> -Section S99<br> -Paragraph 1<br> -Subparagraph (SX 210.5-02.1)<br> -URI http://asc.fasb.org/extlink&amp;oid=6877327&amp;loc=d3e13212-122682<br></p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_CashAndCashEquivalentsAtCarryingValue</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>us-gaap_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:monetaryItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>debit</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>instant</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseExcludingExchangeRateEffect">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div><p>Amount of increase (decrease) in cash and cash equivalents, and cash and cash equivalents restricted to withdrawal or usage; excluding effect from exchange rate change. Cash includes, but is not limited to, currency on hand, demand deposits with banks or financial institutions, and other accounts with general characteristics of demand deposits. Cash equivalents include, but are not limited to, short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates.</p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 830<br> -SubTopic 230<br> -Section 45<br> -Paragraph 1<br> -URI http://asc.fasb.org/extlink&amp;oid=98513438&amp;loc=d3e33268-110906<br><br>Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 230<br> -SubTopic 10<br> -Section 45<br> -Paragraph 24<br> -URI http://asc.fasb.org/extlink&amp;oid=109223946&amp;loc=d3e3521-108585<br></p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseExcludingExchangeRateEffect</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>us-gaap_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:monetaryItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>debit</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_DepreciationAndAmortization">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div><p>The current period expense charged against earnings on long-lived, physical assets not used in production, and which are not intended for resale, to allocate or recognize the cost of such assets over their useful lives; or to record the reduction in book value of an intangible asset over the benefit period of such asset; or to reflect consumption during the period of an asset that is not used in production.</p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 360<br> -SubTopic 10<br> -Section 50<br> -Paragraph 1<br> -Subparagraph (a)<br> -URI http://asc.fasb.org/extlink&amp;oid=6391035&amp;loc=d3e2868-110229<br><br>Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 230<br> -SubTopic 10<br> -Section 45<br> -Paragraph 28<br> -Subparagraph (b)<br> -URI http://asc.fasb.org/extlink&amp;oid=109223946&amp;loc=d3e3602-108585<br></p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_DepreciationAndAmortization</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>us-gaap_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:monetaryItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>debit</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_IncreaseDecreaseInAccountsPayableAndAccruedLiabilities">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div><p>The increase (decrease) during the reporting period in the amounts payable to vendors for goods and services received and the amount of obligations and expenses incurred but not paid.</p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 230<br> -SubTopic 10<br> -Section 45<br> -Paragraph 28<br> -Subparagraph (a)<br> -URI http://asc.fasb.org/extlink&amp;oid=109223946&amp;loc=d3e3602-108585<br></p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_IncreaseDecreaseInAccountsPayableAndAccruedLiabilities</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>us-gaap_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:monetaryItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>debit</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_IncreaseDecreaseInOperatingAssetsAbstract">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- References</a><div><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_IncreaseDecreaseInOperatingAssetsAbstract</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>us-gaap_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:stringItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_IncreaseDecreaseInPrepaidExpense">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div><p>The increase (decrease) during the reporting period in the amount of outstanding money paid in advance for goods or services that bring economic benefits for future periods.</p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 230<br> -SubTopic 10<br> -Section 45<br> -Paragraph 28<br> -Subparagraph (a)<br> -URI http://asc.fasb.org/extlink&amp;oid=109223946&amp;loc=d3e3602-108585<br></p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_IncreaseDecreaseInPrepaidExpense</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>us-gaap_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:monetaryItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>credit</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_NetCashProvidedByUsedInFinancingActivities">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div><p>Amount of cash inflow (outflow) from financing activities, including discontinued operations. Financing activity cash flows include obtaining resources from owners and providing them with a return on, and a return of, their investment; borrowing money and repaying amounts borrowed, or settling the obligation; and obtaining and paying for other resources obtained from creditors on long-term credit.</p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://www.xbrl.org/2003/role/disclosureRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 230<br> -SubTopic 10<br> -Section 45<br> -Paragraph 24<br> -URI http://asc.fasb.org/extlink&amp;oid=109223946&amp;loc=d3e3521-108585<br></p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_NetCashProvidedByUsedInFinancingActivities</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>us-gaap_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:monetaryItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>debit</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- References</a><div><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>us-gaap_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:stringItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_NetCashProvidedByUsedInInvestingActivities">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div><p>Amount of cash inflow (outflow) from investing activities, including discontinued operations. Investing activity cash flows include making and collecting loans and acquiring and disposing of debt or equity instruments and property, plant, and equipment and other productive assets.</p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://www.xbrl.org/2003/role/disclosureRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 230<br> -SubTopic 10<br> -Section 45<br> -Paragraph 24<br> -URI http://asc.fasb.org/extlink&amp;oid=109223946&amp;loc=d3e3521-108585<br></p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_NetCashProvidedByUsedInInvestingActivities</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>us-gaap_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:monetaryItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>debit</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- References</a><div><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>us-gaap_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:stringItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_NetCashProvidedByUsedInOperatingActivities">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div><p>Amount of cash inflow (outflow) from operating activities, including discontinued operations. Operating activity cash flows include transactions, adjustments, and changes in value not defined as investing or financing activities.</p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 230<br> -SubTopic 10<br> -Section 45<br> -Paragraph 25<br> -URI http://asc.fasb.org/extlink&amp;oid=109223946&amp;loc=d3e3536-108585<br><br>Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 230<br> -SubTopic 10<br> -Section 45<br> -Paragraph 24<br> -URI http://asc.fasb.org/extlink&amp;oid=109223946&amp;loc=d3e3521-108585<br><br>Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 230<br> -SubTopic 10<br> -Section 45<br> -Paragraph 28<br> -URI http://asc.fasb.org/extlink&amp;oid=109223946&amp;loc=d3e3602-108585<br></p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_NetCashProvidedByUsedInOperatingActivities</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>us-gaap_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:monetaryItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- References</a><div><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract</td>
</tr>
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<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div><p>The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.</p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://www.xbrl.org/2003/role/disclosureRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 220<br> -SubTopic 10<br> -Section 45<br> -Paragraph 1A<br> -Subparagraph (a)<br> -URI http://asc.fasb.org/extlink&amp;oid=114867106&amp;loc=SL7669619-108580<br><br>Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 942<br> -SubTopic 220<br> -Section S99<br> -Paragraph 1<br> -Subparagraph (SX 210.9-04(22))<br> -URI http://asc.fasb.org/extlink&amp;oid=114873765&amp;loc=SL114874048-224260<br><br>Reference 3: http://www.xbrl.org/2003/role/disclosureRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 220<br> -SubTopic 10<br> -Section 45<br> -Paragraph 1B<br> -Subparagraph (a)<br> -URI http://asc.fasb.org/extlink&amp;oid=114867106&amp;loc=SL7669625-108580<br><br>Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 944<br> -SubTopic 220<br> -Section S99<br> -Paragraph 1<br> -Subparagraph (SX 210.7-04(18))<br> -URI http://asc.fasb.org/extlink&amp;oid=114873790&amp;loc=SL114874131-224263<br><br>Reference 5: http://fasb.org/us-gaap/role/ref/legacyRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 220<br> -SubTopic 10<br> -Section S99<br> -Paragraph 2<br> -Subparagraph (SX 210.5-03(20))<br> -URI http://asc.fasb.org/extlink&amp;oid=115205541&amp;loc=SL114868664-224227<br><br>Reference 6: http://fasb.org/us-gaap/role/ref/legacyRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 230<br> -SubTopic 10<br> -Section 45<br> -Paragraph 28<br> -URI http://asc.fasb.org/extlink&amp;oid=109223946&amp;loc=d3e3602-108585<br><br>Reference 7: http://fasb.org/us-gaap/role/ref/legacyRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 260<br> -SubTopic 10<br> -Section 50<br> -Paragraph 1<br> -URI http://asc.fasb.org/extlink&amp;oid=6371337&amp;loc=d3e3550-109257<br></p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_NetIncomeLoss</td>
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<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div><p>Amount of cash outflow (inflow) through acquisition (sale) of short-term available-for-sale securities.</p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 230<br> -SubTopic 10<br> -Section 45<br> -Paragraph 12<br> -Subparagraph (a)<br> -URI http://asc.fasb.org/extlink&amp;oid=109223946&amp;loc=d3e3179-108585<br><br>Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 230<br> -SubTopic 10<br> -Section 45<br> -Paragraph 9<br> -Subparagraph (a)<br> -URI http://asc.fasb.org/extlink&amp;oid=109223946&amp;loc=d3e3098-108585<br><br>Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 230<br> -SubTopic 10<br> -Section 45<br> -Paragraph 13<br> -Subparagraph (a)<br> -URI http://asc.fasb.org/extlink&amp;oid=109223946&amp;loc=d3e3213-108585<br></p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_PaymentsForProceedsFromAvailableforsaleSecuritiesShortterm</td>
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<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div><p>The cash outflow to reacquire common stock during the period.</p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 230<br> -SubTopic 10<br> -Section 45<br> -Paragraph 15<br> -Subparagraph (a)<br> -URI http://asc.fasb.org/extlink&amp;oid=109223946&amp;loc=d3e3291-108585<br></p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_PaymentsForRepurchaseOfCommonStock</td>
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<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div><p>The cash outflow to acquire equity securities classified as available-for-sale securities, because they are not classified as trading securities.</p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 320<br> -SubTopic 10<br> -Section 45<br> -Paragraph 11<br> -URI http://asc.fasb.org/extlink&amp;oid=109979856&amp;loc=d3e26853-111562<br><br>Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 230<br> -SubTopic 10<br> -Section 45<br> -Paragraph 13<br> -Subparagraph (b)<br> -URI http://asc.fasb.org/extlink&amp;oid=109223946&amp;loc=d3e3213-108585<br></p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_PaymentsToAcquireAvailableForSaleSecuritiesEquity</td>
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<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
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<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div><p>Amount of cash outflow for the purchase of or improvements to tangible or intangible assets, used to produce goods or deliver services, classified as other.</p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 230<br> -SubTopic 10<br> -Section 45<br> -Paragraph 13<br> -Subparagraph (c)<br> -URI http://asc.fasb.org/extlink&amp;oid=109223946&amp;loc=d3e3213-108585<br></p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_PaymentsToAcquireOtherProductiveAssets</td>
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<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
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<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div><p>The cash inflow provided by derivative instruments during the period, which are classified as investing activities, excluding those designated as hedging instruments.</p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 230<br> -SubTopic 10<br> -Section 45<br> -Paragraph 12<br> -URI http://asc.fasb.org/extlink&amp;oid=109223946&amp;loc=d3e3179-108585<br></p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_ProceedsFromDerivativeInstrumentInvestingActivities</td>
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<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div><p>The cash inflow associated with the aggregate amount received by the entity through sale or maturity of marketable securities  (held-to-maturity or available-for-sale) during the period.</p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;"><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_ProceedsFromSaleAndMaturityOfMarketableSecurities</td>
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<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div><p>The noncash expense that accounts for the value of stock or unit options distributed to employees as compensation.</p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 230<br> -SubTopic 10<br> -Section 45<br> -Paragraph 28<br> -Subparagraph (b)<br> -URI http://asc.fasb.org/extlink&amp;oid=109223946&amp;loc=d3e3602-108585<br></p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_StockOptionPlanExpense</td>
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<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
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<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div><p>The net change in the difference between the fair value and the carrying value, or in the comparative fair values, of derivative instruments, including options, swaps, futures, and forward contracts, held at each balance sheet date, that was included in earnings for the period.</p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 230<br> -SubTopic 10<br> -Section 45<br> -Paragraph 28<br> -Subparagraph (b)<br> -URI http://asc.fasb.org/extlink&amp;oid=109223946&amp;loc=d3e3602-108585<br></p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
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<span style="display: none;">v3.8.0.1</span><table class="report" border="0" cellspacing="2" id="idp6796352784">
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<th class="tl" colspan="1" rowspan="2"><div style="width: 200px;"><strong>Business and Significant Accounting Policies<br></strong></div></th>
<th class="th" colspan="1">3 Months Ended</th>
</tr>
<tr><th class="th"><div>Mar. 31, 2018</div></th></tr>
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<td class="pl " style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_AccountingPoliciesAbstract', window );"><strong>Accounting Policies [Abstract]</strong></a></td>
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<td class="pl " style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_BusinessDescriptionAndAccountingPoliciesTextBlock', window );">Business and Significant Accounting Policies</a></td>
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<p style="font: 10pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0"><b>1.&#160;&#160;&#160;&#160;&#160;&#160;&#160;Business
and Significant Accounting Policies</b></p>

<p style="font: 10pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0">&#160;</p>

<p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0"><i>Business and company formation</i></p>

<p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0">&#160;</p>

<p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0; text-indent: 0.5in">Solitario Zinc Corp. (&#8220;Solitario,&#8221;
or the &#8220;Company&#8221;) is an exploration stage company as defined in Industry Guide 7, as issued by the United States Securities
and Exchange Commission (&#8220;SEC&#8221;). Solitario was incorporated in the state of Colorado on November 15, 1984 as a wholly-owned
subsidiary of Crown Resources Corporation (&#34;Crown&#34;). In July 1994, Solitario became a publicly traded company on the Toronto
Stock Exchange (the &#34;TSX&#34;) through its initial public offering. Solitario has been actively involved in mineral exploration
since 1993. Solitario&#8217;s primary business is to acquire exploration mineral properties or royalties and/or discover economic
deposits on its mineral properties and advance these deposits, either on its own or through joint ventures, up to the development
stage. At that point, or sometime prior to that point, Solitario would likely attempt to sell its mineral properties, pursue their
development either on its own, or through a joint venture with a partner that has expertise in mining operations, or create a royalty
with a third party that continues to advance the property. As a result of the Acquisition (defined below), Solitario is now primarily
focused on the acquisition and exploration of zinc-related exploration mineral properties. In addition to focusing on its mineral
exploration properties and the evaluation of mineral properties for acquisition or purchase of royalty interests, Solitario also
evaluates potential strategic transactions for the acquisition of new precious and base metal properties and assets with exploration
potential or business combinations that Solitario determines to be favorable to Solitario.</p>

<p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0; text-indent: 0.5in">&#160;</p>

<p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0; text-indent: 0.5in">Solitario has recorded revenue in
the past from the sale of mineral property, including the sale in 2015 of its former interest in Mount Hamilton LLC (&#8220;MH-LLC&#8221;)
the owner of its former Mt. Hamilton project (the &#8220;Mt. Hamilton Transaction&#8221;), and joint venture property payments
and the sale of a royalty on its former Mt. Hamilton project. Revenues from the sale or joint venture of properties or assets,
although significant when they occur, have not been a consistent annual source of revenue and would only occur in the future, if
at all, on an infrequent basis.</p>

<p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0; text-indent: 0.5in">&#160;</p>

<p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0; text-indent: 0.5in">Solitario currently considers its
carried interest in the Florida Canyon project and its interest in the Lik project to be its core mineral property assets. Solitario&#8217;s
joint venture partner is expected to continue the development and furtherance of the Florida Canyon project and Solitario will
monitor progress at Florida Canyon. Solitario is working with its 50% joint venture partner, Teck American Incorporated, a wholly-owned
subsidiary of Teck Resources Limited ( both companies referred to as &#8220;Teck&#8221;), in the Lik deposit to further the exploration
and evaluate potential development plans for the Lik project.</p>

<p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0; text-indent: 0.5in">&#160;</p>

<p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0; text-indent: 0.5in"><font style="color: windowtext">As
of March 31, 2018, Solitario has significant balances of cash and short-term investments that Solitario anticipates using, in part,
to further the development of the Florida Canyon and Lik projects and to potentially acquire additional mineral property assets.
The</font> fluctuations in precious metal and other commodity prices contribute to a challenging environment for mineral exploration
and development, which has created opportunities as well as challenges for the potential acquisition of early-stage and advanced
mineral exploration projects or other related assets at potentially attractive terms.</p>

<p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0; text-indent: 0.5in">&#160;</p>

<p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0; text-indent: 0.5in">The accompanying interim condensed
consolidated financial statements of Solitario for the three months ended March 31, 2018 are unaudited and are prepared in accordance
with accounting principles generally accepted in the United States of America (&#8220;generally accepted accounting principles&#8221;).
They do not include all disclosures required by generally accepted accounting principles for annual financial statements, but in
the opinion of management, include all adjustments, consisting only of normal recurring items, necessary for a fair presentation.
Interim results are not necessarily indicative of results, which may be achieved in the future or for the full year ending December
31, 2018.</p>

<p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0">&#160;</p>

<p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0; text-indent: 0.5in">These financial statements should
be read in conjunction with the financial statements and notes thereto which are included in Solitario&#8217;s Annual Report on
Form 10-K for the year ended December 31, 2017. The accounting policies set forth in those annual financial statements are the
same as the accounting policies utilized in the preparation of these financial statements, except as modified for appropriate interim
financial statement presentation.</p>

<p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0; text-indent: 0.5in">&#160;</p>

<p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0; text-indent: 0.5in">&#160;</p>

<p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0"><i>Recent Developments</i></p>

<p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0">&#160;</p>

<p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0"><u>Purchase of Zazu</u></p>

<p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0; text-indent: 0.5in">&#160;</p>

<p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0; text-indent: 0.5in">On July 12, 2017, Solitario completed
the acquisition of Zazu Metals Corp. (&#8220;Zazu&#8221;) pursuant to a definitive arrangement agreement between Solitario and
Zazu whereby Solitario agreed to acquire all of the issued and outstanding common shares of Zazu (the &#34;Zazu Shares&#34;) by
way of a statutory plan of arrangement (the &#34;Arrangement&#34;) under the <i>Canada Business Corporations Act</i> (the &#8220;Acquisition&#8221;).
The Arrangement was approved by the Ontario (Canada) Superior Court of Justice on July 7, 2017. Per the Arrangement, Solitario
issued 19,788,177 shares of its common stock on July 12, 2017 in exchange for all of the issued and outstanding Zazu Shares, which
represented 0.3572 shares of Solitario common stock for each outstanding Zazu Share. Zazu had one primary asset, its interest in
the Lik project, and the Acquisition was treated as an asset purchase in accordance with ASU 2017-01 &#8220;Business Combinations.&#8221;
Solitario granted stock options to acquire an aggregate of 1,782,428 shares of Solitario common stock to Zazu option holders the
(&#8220;Replacement Options&#8221;) in connection with the Acquisition. The total purchase price of $16,110,000 was recorded during
the year ended December 31, 2017.</p>

<p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0">&#160;</p>

<p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0"><i>Financial reporting</i></p>

<p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0">&#160;</p>

<p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0; text-indent: 0.5in">The consolidated financial statements
include the accounts of Solitario and its wholly-owned subsidiaries. All significant intercompany accounts and transactions have
been eliminated in consolidation. The consolidated financial statements are prepared in accordance with accounting principles generally
accepted in the United States of America (&#34;generally accepted accounting principles&#34;) and are expressed in U.S. dollars.</p>

<p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0">&#160;</p>

<p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0"><i>Revenue recognition</i></p>

<p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0">&#160;</p>

<p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0; text-indent: 0.5in">Solitario records delay rental payments
as revenue in the period received. Any payments received for the sale of property interests are recorded as a reduction of the
related property's capitalized cost. Proceeds which exceed the capitalized cost of the property without reserves are recognized
as revenue. Payments received on the sale of properties with reserves are recognized as revenue to the extent the proceeds exceed
the proportionate basis in the assets sold. There were no delay rentals in the periods presented.</p>

<p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0">&#160;</p>

<p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0"><i>Use of estimates</i></p>

<p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0">&#160;</p>

<p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0; text-indent: 0.5in">The preparation of financial statements
in conformity with generally accepted accounting principles requires management to make estimates and assumptions that affect the
reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements
and the reported amounts of revenues and expenses during the reporting period. Actual results could differ from those estimates.
Some of the more significant estimates included in the preparation of Solitario's financial statements pertain to: (i) Solitario&#8217;s
carrying value of short-term investments; (ii) the recoverability of mineral properties related to its mineral exploration properties
and their future exploration potential; (iii) the fair value of stock option grants to employees, to officers and directors and
to others; (iv) the ability of Solitario to realize its deferred tax assets; and (v) Solitario's investment in marketable equity
securities.</p>

<p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0">&#160;</p>

<p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0; text-indent: 0.5in">In performing its activities, Solitario
has incurred certain costs for mineral properties. The recovery of these costs is ultimately dependent upon the sale of mineral
property interests or the development of economically recoverable ore reserves and the ability of Solitario to obtain the necessary
permits and financing to successfully place the properties into production, and upon future profitable operations, none of which
is assured.</p>

<p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0">&#160;</p>

<p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0"><i>Cash equivalents </i></p>

<p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0">&#160;</p>

<p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0; text-indent: 0.5in">Cash equivalents include investments
in highly liquid money-market securities with original maturities of three months or less when purchased. As of March 31, 2018,
a portion of Solitario&#8217;s cash and cash equivalents are held in brokerage accounts and foreign banks, which are not covered
under the Federal Deposit Insurance Corporation (&#8220;FDIC&#8221;) rules for the United States. At March 31, 2018, Solitario
holds short-term investments in United States Treasury securities (&#8220;USTS&#8221;) of $9,976,000.</p>

<p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0">&#160;</p>

<p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0"><i>Short-term investments</i></p>

<p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0"><i>&#160;</i></p>

<p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0; text-indent: 0.5in">As of March 31, 2018, Solitario has
$9,976,000 of its current assets in USTS with maturities of 15 days to 21 months. The USTS are recorded at their fair value, based
upon quoted market prices. As of March 31, 2018, we have $1,247,000 in separate bank certificates of deposit (&#8220;CDs&#8221;)
each with a maximum value of $250,000, and each of which are covered by FDIC insurance to the full-face value of the CDs. At March
31, 2018, the CDs have maturities of between 4 and 15 months. Solitario&#8217;s short-term investments are recorded at their fair
value, based upon quoted market prices. The short-term investments are highly liquid and may be sold in their entirety at any time
at their quoted market price and are classified as a current asset.</p>

<p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0"><i>&#160;</i></p>

<p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0"><i>Mineral properties </i></p>

<p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0; text-indent: 0.5in">&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;</p>

<p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0; text-indent: 0.5in">Solitario expenses all exploration
costs incurred on its mineral properties prior to the establishment of proven and probable reserves through the completion of a
feasibility study. Initial acquisition costs of Solitario&#8217;s mineral properties are capitalized. Solitario capitalizes all
of its development expenditures on its projects, subsequent to the completion of a feasibility study. Solitario regularly performs
evaluations of its investment in mineral properties to assess the recoverability and/or the residual value of its investments in
these assets. All long-lived assets are reviewed for impairment whenever events or circumstances change which indicate the carrying
amount of an asset may not be recoverable, utilizing established guidelines based upon undiscounted future net cash flows from
the asset or upon the determination that certain exploration properties do not have sufficient potential for economic mineralization.</p>

<p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0">&#160;</p>

<p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0"><i>Derivative instruments</i></p>

<p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0"><i>&#160;</i></p>

<p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0; text-align: left; text-indent: 0.5in">Solitario accounts
for its derivative instruments in accordance with ASC 815, &#34;Accounting for Derivative Instruments and Hedging Activities&#34;
(&#8220;ASC 815&#8221;). Solitario has entered into covered calls from time to time on its investment in Kinross Gold Corporation
(&#8220;Kinross&#8221;) marketable equity securities. In addition, during 2017 and 2016, Solitario owned warrants exercisable to
acquire shares of Vendetta Mining Corp. (&#8220;Vendetta&#8221;) common stock (the &#8220;Vendetta Warrants&#8221;). Each Vendetta
warrant allowed Solitario to purchase one share of Vendetta common stock at a price of Cdn$0.10 per share for a period of two years.
Solitario has not designated its covered calls as hedging instruments and any changes in the fair value of the covered calls and
its Vendetta Warrants are recognized in the statement of operations in the period of the change as gain or loss on derivative instruments.</p>

<p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0">&#160;</p>

<p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0"><i>Fair value</i></p>

<p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0">&#160;</p>

<p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0; text-indent: 0.5in">FASB ASC 820, &#8220;Fair Value Measurements
and Disclosures&#8221; (&#8220;ASC 820&#8221;), establishes a framework for measuring fair value and requires enhanced disclosures
about fair value measurements. ASC 820 clarifies that fair value is an exit price, representing the amount that would be received
to sell an asset or paid to transfer a liability in an orderly transaction between market participants. For certain of Solitario's
financial instruments, including cash and cash equivalents and accounts payable, the carrying amounts approximate fair value due
to their short-term maturities. Solitario's short-term investments in USTS and CDs, its marketable equity securities and any covered
call options against those marketable equity securities are carried at their estimated fair value based on quoted market prices.</p>

<p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0">&#160;</p>

<p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0"><i>Marketable equity securities</i></p>

<p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0">&#160;</p>

<p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0; text-indent: 0.5in">Solitario's investments in marketable
equity securities are classified as available-for-sale and are carried at fair value, which is based upon quoted prices of the
securities owned. Solitario records investments in marketable equity securities as available-for-sale for investments in publicly
traded marketable equity securities for which it does not exercise significant control and where Solitario has no representation
on the board of directors of those companies and exercises no control over the management of those companies. The cost of marketable
equity securities sold is determined by the specific identification method. During the first three months of 2018 Solitario adopted
ASU 2016-01, &#8220;Financial Instruments &#8211; Recognition and Measurement of Financial Assets and Financial Liabilities (Topic
825)&#8221; (&#8220;ASU 2016-01&#8221;). In accordance with ASU 2016-01, changes in fair value are recorded in the consolidated
statement of operations during the period of the change. During the first three months of 2018 Solitario recorded a cumulative-effect
adjustment to the balance sheet as of the beginning of the fiscal year of adoption of ASU 2016-01. See Note 9, &#8220;Shareholders&#8217;
Equity and Other Comprehensive Income&#8221;, below. &#9;</p>

<p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0"><i>&#160;</i></p>

<p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0"><i>Foreign exchange</i></p>

<p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0">&#160;</p>

<p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0; text-indent: 0.5in">The United States dollar is the functional
currency for all of Solitario's foreign subsidiaries. Although Solitario's South American exploration activities during 2017 and
the first quarter of 2018 have been conducted primarily in Peru, a portion of the payments under the land, leasehold and exploration
agreements of Solitario are denominated in United States dollars. Realized foreign currency gains and losses are included in the
results of operations in the period in which they occur.</p>

<p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0">&#160;</p>

<p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0"><i>Income taxes</i></p>

<p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0">&#160;</p>

<p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0; text-indent: 0.5in">Solitario accounts for income taxes
in accordance with ASC 740, &#8220;Accounting for Income Taxes&#8221; (&#8220;ASC 740&#8221;). Under ASC 740, income taxes are
provided for the tax effects of transactions reported in the financial statements and consist of taxes currently due plus deferred
taxes related to certain income and expenses recognized in different periods for financial and income tax reporting purposes. Deferred
tax assets and liabilities represent the future tax return consequences of those differences, which will either be taxable or deductible
when the assets and liabilities are recovered or settled. Deferred taxes are also recognized for operating losses and tax credits
that are available to offset future taxable income and income taxes, respectively. A valuation allowance is provided if it is more
likely than not that some portion or all of the deferred tax assets will not be realized.</p>

<p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0">&#160;</p>

<p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0"><i>Accounting for uncertainty in income taxes</i></p>

<p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0">&#160;</p>

<p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0; text-indent: 0.5in">ASC 740 clarifies the accounting
for uncertainty in income taxes recognized in a company's financial statements. ASC 740 prescribes a recognition threshold and
measurement attribute for the financial statement recognition and measurement of a tax position taken or expected to be taken in
a tax return. ASC 740 also provides guidance on derecognition, classification, interest and penalties, accounting in interim periods,
disclosure, and transition. ASC 740 provides that a company's tax position will be considered settled if the taxing authority has
completed its examination, the company does not plan to appeal, and it is remote that the taxing authority would reexamine the
tax position in the future. The provisions of ASC 740 had no effect on Solitario's financial position or results of operations.</p>

<p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0">&#160;</p>

<p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0"><i>Earnings per share</i></p>

<p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0">&#160;</p>

<p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0; text-indent: 0.5in">The calculation of basic and
diluted earnings (loss) per share is based on the weighted average number of shares of common stock outstanding during the
three months ended March 31, 2018 and 2017. Potentially dilutive shares related to outstanding common stock options of
2,082,428 Solitario common shares for the three months ended March 31, 2018 were excluded from the calculation of diluted
earnings (loss) per share because the effects were anti-dilutive. There were no similar potentially dilutive securities
outstanding during the three months ended March 31, 2017.</p>

<p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0.5in; text-indent: -0.5in">&#160;</p>

<p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0"><i>Employee stock compensation and incentive plans</i></p>

<p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0">&#160;</p>

<p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0; text-indent: 0.5in">Solitario classifies all of its stock
options as equity options in accordance with the provisions of ASC 718, &#8220;Compensation &#8211; Stock Compensation.&#8221;</p>

<p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0">&#160;</p>

<p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0"><i>Recent accounting pronouncements</i></p>

<p style="font: 12pt Times New Roman, Times, Serif; margin-right: 30.6pt; margin-left: 0">&#160;</p>

<p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0; text-indent: 0.5in">In February 2016, the FASB issued
ASU 2016-02, &#8220;Leases&#8221; (&#8220;ASU No. 2016-02&#8221;), which will require lessees to recognize a right-of-use asset
and a lease liability for all leases that are not short-term in nature. For a lessor, the accounting applied is also largely unchanged
from previous guidance. The new rules will be effective for Solitario in the first quarter of 2019. Solitario does not anticipate
early adoption. Solitario does not expect the adoption of ASU No. 2016-02 to materially change its current accounting methods and
therefore it does not expect the adoption to have a material impact on its consolidated financial position or results of operations.</p>

<p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0; text-indent: 0.5in">&#160;</p>

<p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0; text-indent: 0.5in">In January 2016 the FASB issued ASU
No 2016-01<i>.</i> ASU No. 2016-01 revises the classification and measurement of investment in certain equity investments and the
presentation of certain fair value changes for certain financial liabilities measured at fair value. ASU No. 2016-01 requires the
change in fair value of many equity investments to be recognized in net income. ASU No. 2016-01 is effective for interim and annual
periods beginning after December 15, 2017, with early adoption permitted. Solitario adopted ASU No. 2016-01 in the first quarter
of 2018. Solitario recorded a cumulative-effect adjustment for the change in accounting principle to retained earnings of $576,000
related to the adoption of ASU 2016-01. See Note 9, &#8220;Shareholders&#8217; Equity and Accumulated Other Comprehensive Income,&#8221;
below.</p>

<p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0.5in; text-indent: -0.5in"><b>&#160;</b></p>

<p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0; text-indent: 0.5in">In February 2018, the FASB issued
ASU No. 2018-02, &#8220;Reclassification of Certain Tax Effects from Accumulated Other Comprehensive Income&#8221; (ASU 2018-02),
which allows for a reclassification from accumulated other comprehensive income or loss to retained earnings or accumulated deficit
for stranded tax effects resulting from the Tax Cuts and Jobs Act of 2017 (&#8220;TCJA&#8221;). ASU 2018-02 also requires certain
related disclosures. ASU 2018-02 is effective for annual periods, and interim periods within those annual periods, beginning after
December 15, 2018 and should be applied either in the period of adoption or retrospectively to each period in which the effect
of the change in the U.S. federal corporate income tax rate in the TCJA is recognized. Early adoption is permitted. Solitario is
currently evaluating the impact of ASU 2018-02&#160;but&#160;does not believe it will have a material effect on Solitario&#8217;s
financial position or results of operations.</p>



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<span style="display: none;">v3.8.0.1</span><table class="report" border="0" cellspacing="2" id="idp6632187936">
<tr>
<th class="tl" colspan="1" rowspan="2"><div style="width: 200px;"><strong>Mineral Property<br></strong></div></th>
<th class="th" colspan="1">3 Months Ended</th>
</tr>
<tr><th class="th"><div>Mar. 31, 2018</div></th></tr>
<tr class="re">
<td class="pl " style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_srt_ExtractiveIndustriesAbstract', window );"><strong>Extractive Industries [Abstract]</strong></a></td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl " style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_MineralIndustriesDisclosuresTextBlock', window );">Mineral Property</a></td>
<td class="text"><p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0.5in; text-indent: -0.5in"><b>2.&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;Mineral
Property</b></p>

<p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0.5in; text-indent: -0.5in">&#160;</p>

<p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0">The following table details Solitario&#8217;s investment
in Mineral Property:</p>

<table cellspacing="0" cellpadding="0" style="font: 10pt Times New Roman, Times, Serif; width: 100%; border-collapse: collapse">
<tr>
    <td style="vertical-align: top; padding-right: 5.4pt; padding-left: 5.4pt; layout-grid-mode: line">(in thousands)</td>
    <td colspan="2" style="vertical-align: bottom; padding-right: 5.4pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: center">March 31,</td>
    <td style="vertical-align: bottom; padding-right: 5.4pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: center">December 31,</td></tr>
<tr>
    <td style="vertical-align: top; padding-right: 5.4pt; padding-left: 5.4pt; layout-grid-mode: line">&#160;</td>
    <td style="vertical-align: bottom; border-bottom: Black 1pt solid; padding-right: 5.4pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: center">2018</td>
    <td colspan="2" style="vertical-align: bottom; border-bottom: Black 1pt solid; padding-right: 5.4pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: center">2017</td></tr>
<tr style="vertical-align: bottom">
    <td style="padding-right: 5.4pt; padding-left: 5.4pt; layout-grid-mode: line">Exploration</td>
    <td style="padding-right: 5.4pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: right">&#160;</td>
    <td colspan="2" style="padding-right: 5.4pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: right">&#160;</td></tr>
<tr style="vertical-align: bottom">
    <td style="padding-right: 5.4pt; padding-left: 5.4pt; layout-grid-mode: line">&#160;&#160;&#160;Lik project (Alaska &#8211; US)</td>
    <td style="padding-right: 5.4pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: right">$15,611&#160;</td>
    <td colspan="2" style="padding-right: 5.4pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: right">$15,611&#160;</td></tr>
<tr style="vertical-align: bottom">
    <td style="padding-right: 5.4pt; padding-left: 5.4pt; layout-grid-mode: line">&#160;&#160;&#160;La Promesa (Peru)</td>
    <td style="padding-right: 5.4pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: right">6&#160;</td>
    <td colspan="2" style="padding-right: 5.4pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: right">6&#160;</td></tr>
<tr style="vertical-align: bottom">
    <td style="padding-right: 5.4pt; padding-left: 5.4pt; layout-grid-mode: line">&#160;&#160;&#160;Montana Royalty property (US)</td>
    <td style="padding-right: 5.4pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: right">40&#160;</td>
    <td colspan="2" style="padding-right: 5.4pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: right">40&#160;</td></tr>
<tr style="vertical-align: bottom">
    <td style="padding-right: 5.4pt; padding-left: 5.4pt; layout-grid-mode: line">&#160;&#160;&#160;&#160;&#160;Total exploration mineral property</td>
    <td style="border-top: Black 1pt solid; border-bottom: Black 1pt solid; padding-right: 5.4pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: right">&#160;&#160;$15,657&#160;</td>
    <td colspan="2" style="border-top: Black 1pt solid; border-bottom: Black 1pt solid; padding-right: 5.4pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: right">&#160;&#160;$15,657&#160;</td></tr>
<tr>
    <td style="width: 71%">&#160;</td>
    <td style="width: 14%">&#160;</td>
    <td style="width: 1%">&#160;</td>
    <td style="width: 14%">&#160;</td></tr>
</table>
<p style="font: 10pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0; text-indent: 0.5in">&#160;</p>

<p style="font: 10pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0; text-indent: 0.5in">All exploration costs on our other
exploration properties, none of which have proven and probable reserves, including any additional costs incurred for subsequent
lease payments or exploration activities related to our projects are expensed as incurred.</p>

<p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0">&#160;</p>

<p style="font: 10pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0.5in; text-indent: -0.5in"><u>Exploration expense</u></p>

<p style="font: 10pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0">&#160;</p>

<p style="font: 10pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0">The following items comprised exploration expense:</p>

<p style="font: 10pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0">&#160;</p>

<table cellspacing="0" cellpadding="0" style="width: 100%; font: 10pt Times New Roman, Times, Serif; border-collapse: collapse">
<tr>
    <td style="vertical-align: top; padding-right: 0.55in; padding-left: 5.4pt; layout-grid-mode: line">(in thousands)</td>
    <td colspan="2" style="vertical-align: bottom; border-bottom: Black 1pt solid; padding-right: 8.1pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: center">Three months ended<br />
&#160;March 31,</td></tr>
<tr>
    <td style="vertical-align: top; width: 72%; padding-right: 0.55in; padding-left: 5.4pt; layout-grid-mode: line">&#160;</td>
    <td style="vertical-align: bottom; width: 14%; border-bottom: Black 1pt solid; padding-right: 8.1pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: center">2018</td>
    <td style="vertical-align: bottom; width: 14%; border-top: Black 1pt solid; border-bottom: Black 1pt solid; padding-right: 8.1pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: center">2017</td></tr>
<tr>
    <td style="vertical-align: top; padding-right: 0.55in; padding-left: 5.4pt; layout-grid-mode: line">Geologic and field expenses</td>
    <td style="vertical-align: bottom; padding-right: 8.1pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: right">$24&#160;</td>
    <td style="vertical-align: bottom; padding-right: 8.1pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: right">$22&#160;</td></tr>
<tr>
    <td style="vertical-align: top; padding-right: 0.55in; padding-left: 5.4pt; layout-grid-mode: line">Administrative</td>
    <td style="vertical-align: bottom; padding-right: 8.1pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: right">156&#160;</td>
    <td style="vertical-align: bottom; padding-right: 8.1pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: right">129&#160;</td></tr>
<tr>
    <td style="vertical-align: top; padding-right: 0.55in; padding-left: 5.4pt; layout-grid-mode: line">Total exploration costs</td>
    <td style="vertical-align: bottom; border-top: Black 1pt solid; border-bottom: Black 1pt solid; padding-right: 8.1pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: right">$ 180&#160;</td>
    <td style="vertical-align: bottom; border-top: Black 1pt solid; border-bottom: Black 1pt solid; padding-right: 8.1pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: right">$ 151&#160;</td></tr>
</table>
<p style="font: 10pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0">&#160;</p>

<p style="font: 10pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0"><u>Asset Retirement Obligation</u></p>

<p style="font: 10pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0">&#160;</p>

<p style="font: 10pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0; text-indent: 0.5in">In connection with the Acquisition,
Solitario recorded an asset retirement obligation of $125,000 for Solitario&#8217;s estimated reclamation cost of the existing
disturbance at the Lik project. This disturbance consists of an exploration camp including certain drill sites and access roads
at the camp. The estimate was based upon estimated cash costs for reclamation as determined by the permitting bond required by
the State of Alaska, for which Solitario has purchased a reclamation bond insurance policy in the event Solitario or its 50% partner,
Teck, do not complete required reclamation.</p>

<p style="font: 10pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0">&#160;</p>

<p style="font: 10pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0; text-indent: 0.5in">Solitario has not applied a discount
rate to the recorded asset retirement obligation as the estimated time frame for reclamation is not currently known, as reclamation
is not expected to occur until the end of the Lik project life, which would follow future development and operations, the start
of which cannot be estimated or assured at this time. Additionally, no depreciation will be recorded on the related asset for the
asset retirement obligation until the Lik project goes into operation, which cannot be assured.</p><span></span>
</td>
</tr>
</table>
<div style="display: none;">
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<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- References</a><div><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
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<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div><p>The entire disclosure for mineral industries.</p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 930<br> -URI http://asc.fasb.org/topic&amp;trid=2155974<br><br>Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 932<br> -URI http://asc.fasb.org/topic&amp;trid=2145477<br></p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
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<DOCUMENT>
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<span style="display: none;">v3.8.0.1</span><table class="report" border="0" cellspacing="2" id="idp6796446880">
<tr>
<th class="tl" colspan="1" rowspan="2"><div style="width: 200px;"><strong>Marketable Equity Securities<br></strong></div></th>
<th class="th" colspan="1">3 Months Ended</th>
</tr>
<tr><th class="th"><div>Mar. 31, 2018</div></th></tr>
<tr class="re">
<td class="pl " style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_XPL_NotesToFinancialStatementsAbstract', window );"><strong>Notes to Financial Statements</strong></a></td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl custom" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_XPL_InvestmentsDebtAndEquitySecuritiesTextBlock', window );">Marketable Equity Securities</a></td>
<td class="text"><p style="margin: 0pt"></p>

<p style="font: 10pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0"><b>3. &#160;&#160;&#160;&#160;&#160;&#160;&#160;Marketable
Equity Securities</b></p>

<p style="font: 10pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0">&#160;</p>

<p style="font: 10pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0; text-indent: 0.5in">Solitario's investments in marketable
equity securities are classified as available-for-sale and are carried at fair value, which is based upon quoted prices of the
securities owned. The cost of marketable equity securities sold is determined by the specific identification method. Changes in
market value are recorded in the consolidated statement of operations. During the three months ended March 31, 2018, Solitario
recorded an unrealized loss on marketable equity securities of $441,000. During the three months ended March 31, 2017, Solitario
recorded an unrealized gain on marketable equity securities of $128,000.</p>

<p style="font: 10pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0; text-indent: 0.5in">&#160;</p>

<p style="font: 10pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0; text-indent: 0.5in">On May 2, 2016 Solitario purchased
7,240,000 units of Vendetta for aggregate consideration of $289,000. Each unit included one common share of Vendetta and one Vendetta
Warrant. The total purchase price for the units of $289,000 was allocated between the Vendetta common shares and the Vendetta Warrants
based upon total fair values on the date of purchase. The Vendetta common shares were allocated a purchase cost of $186,000 and
the Vendetta Warrants were allocated a purchase cost of $103,000. During the three months ended March 31, 2017, Solitario sold
1,480,000 common shares of Vendetta for proceeds of $259,000, and a recorded cost of $38,000. In addition, during the three months
ended March 31, 2017 Solitario exercised 2,240,000 of the Vendetta Warrants it held and received 2,240,000 Vendetta common shares,
by paying $167,000 (Cdn$224,000) to Vendetta. The cost of the common shares received from the exercise of the Vendetta Warrants
was recorded based upon the total of the (i) exercise price of the Vendetta Warrants exercised, $167,000, and (ii) the fair value
of the Vendetta Warrants on the date of exercise, which equaled their intrinsic value, $309,000, for a total value of $476,000.
During 2017, subsequent to March 31, 2017, Solitario exercised its remaining 5,000,000 Vendetta Warrants by paying $441,000 and
owns 11,000,000 common shares of Vendetta and no Vendetta Warrants as of March 31, 2018 and December 31, 2017.</p>

<p style="font: 10pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0">&#160;</p>

<p style="font: 10pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0; text-indent: 0.5in">The following tables summarize Solitario&#8217;s
marketable equity securities and adjustments to fair value:</p>

<table cellspacing="0" cellpadding="0" style="font: 10pt Times New Roman, Times, Serif; width: 100%; border-collapse: collapse">
<tr style="vertical-align: bottom">
    <td style="width: 72%; layout-grid-mode: line; text-align: justify">(in thousands)</td>
    <td style="width: 14%; border-bottom: Black 1pt solid; padding-right: 4.5pt; layout-grid-mode: line; text-align: center">&#160;&#160;&#160;&#160;March 31, &#160;&#160;&#160;&#160;2018</td>
    <td style="width: 14%; border-bottom: Black 1pt solid; padding-right: 4.5pt; layout-grid-mode: line; text-align: center">&#160;December 31, &#160;&#160;&#160;&#160;2017</td></tr>
<tr style="vertical-align: bottom">
    <td style="layout-grid-mode: line">&#160;&#160;Marketable equity at cost</td>
    <td style="padding-right: 4.5pt; layout-grid-mode: line; text-align: right">$1,714&#160;</td>
    <td style="padding-right: 9pt; layout-grid-mode: line; text-align: right">$1,714&#160;</td></tr>
<tr style="vertical-align: bottom">
    <td style="layout-grid-mode: line">&#160;&#160;Unrealized gain on marketable equity securities</td>
    <td style="border-bottom: Black 1pt solid; padding-right: 4.5pt; layout-grid-mode: line; text-align: right">488&#160;</td>
    <td style="border-bottom: Black 1pt solid; padding-right: 9pt; layout-grid-mode: line; text-align: right">&#160;&#160;&#160;929&#160;</td></tr>
<tr style="vertical-align: bottom">
    <td style="layout-grid-mode: line">&#160;&#160;Marketable equity securities at fair value</td>
    <td style="border-bottom: Black 1pt solid; padding-right: 4.5pt; layout-grid-mode: line; text-align: right">$2,202&#160;</td>
    <td style="border-bottom: Black 1pt solid; padding-right: 9pt; layout-grid-mode: line; text-align: right">$2,643&#160;</td></tr>
</table>
<p style="font: 10pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0; text-indent: 0.5in">&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;</p>

<p style="font: 10pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0">The following table represents changes, including sales,
in marketable equity securities during the three months ended March 31, 2018 and 2017:</p>

<p style="font: 10pt Times New Roman, Times, Serif; margin: 0">&#160;</p>

<table cellspacing="0" cellpadding="0" style="font: 10pt Times New Roman, Times, Serif; width: 100%; border-collapse: collapse">
<tr style="vertical-align: bottom">
    <td style="padding-right: 5.4pt; padding-left: 5.4pt; layout-grid-mode: line">(in thousands)</td>
    <td colspan="2" style="padding-right: 5.4pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: center">Three months ended<br />
March 31,</td></tr>
<tr style="vertical-align: bottom">
    <td style="width: 72%; padding-right: 5.4pt; padding-left: 5.4pt; layout-grid-mode: line">&#160;</td>
    <td style="width: 14%; border-bottom: Black 1pt solid; padding-right: 5.4pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: center">2018</td>
    <td style="width: 14%; border-bottom: Black 1pt solid; padding-right: 5.4pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: center">2017</td></tr>
<tr style="vertical-align: bottom">
    <td style="padding-right: 5.4pt; padding-left: 5.4pt; layout-grid-mode: line">Cost of marketable equity securities sold</td>
    <td style="padding-right: -0.9pt; padding-left: 0.1in; layout-grid-mode: line; text-align: right">$&#160;&#160;&#160;-&#160;&#160;&#160;</td>
    <td style="padding-right: 3.75pt; padding-left: 0.1in; layout-grid-mode: line; text-align: right">$&#160;&#160;&#160;38&#160;</td></tr>
<tr style="vertical-align: bottom">
    <td style="padding-right: 5.4pt; padding-left: 5.4pt; layout-grid-mode: line">Realized gain on marketable equity securities sold</td>
    <td style="border-bottom: Black 1pt solid; padding-right: -0.9pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: right">-&#160;&#160;&#160;</td>
    <td style="border-bottom: Black 1pt solid; padding-right: 3.75pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: right">221&#160;</td></tr>
<tr style="vertical-align: bottom">
    <td style="padding-right: 5.4pt; padding-left: 5.4pt; layout-grid-mode: line">Proceeds from the sale of marketable equity securities sold</td>
    <td style="padding-right: -0.9pt; padding-left: 0.1in; layout-grid-mode: line; text-align: right">-&#160;&#160;&#160;</td>
    <td style="padding-right: 3.75pt; padding-left: 0.1in; layout-grid-mode: line; text-align: right">(259)</td></tr>
<tr style="vertical-align: bottom">
    <td style="padding-right: 5.4pt; padding-left: 5.4pt; layout-grid-mode: line">Purchase of marketable equity securities</td>
    <td style="padding-right: -0.9pt; padding-left: 0.1in; layout-grid-mode: line; text-align: right">-&#160;&#160;&#160;</td>
    <td style="padding-right: 3.75pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: right">477&#160;</td></tr>
<tr style="vertical-align: bottom">
    <td style="padding-right: 5.4pt; padding-left: 5.4pt; layout-grid-mode: line">Gross unrealized (loss) gain recorded in the statement of operations</td>
    <td style="padding-right: -0.9pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: right">(441)</td>
    <td style="padding-right: 3.75pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: right">128&#160;</td></tr>
<tr style="vertical-align: bottom">
    <td style="padding-right: 5.4pt; padding-left: 5.4pt; layout-grid-mode: line">Change in marketable equity securities at fair value</td>
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<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
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<span style="display: none;">v3.8.0.1</span><table class="report" border="0" cellspacing="2" id="idp6623892224">
<tr>
<th class="tl" colspan="1" rowspan="2"><div style="width: 200px;"><strong>Other Assets<br></strong></div></th>
<th class="th" colspan="1">3 Months Ended</th>
</tr>
<tr><th class="th"><div>Mar. 31, 2018</div></th></tr>
<tr class="re">
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<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl " style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_OtherAssetsDisclosureTextBlock', window );">Other Assets</a></td>
<td class="text"><p style="margin: 0pt"></p>

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Assets</b></p>

<p style="font: 10pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0">&#160;</p>

<p style="font: 10pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0">The following items comprised other assets:</p>

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    <td style="vertical-align: top; width: 72%; padding-right: 0.55in; padding-left: 5.4pt; layout-grid-mode: line">(in thousands)</td>
    <td style="vertical-align: bottom; width: 14%; padding-right: 5.4pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: center">March 31,</td>
    <td style="vertical-align: bottom; width: 14%; padding-right: 5.4pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: center">December 31</td></tr>
<tr>
    <td style="vertical-align: top; padding-right: 0.55in; padding-left: 5.4pt; layout-grid-mode: line">&#160;</td>
    <td style="vertical-align: bottom; border-bottom: Black 1pt solid; padding-right: 8.1pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: center">2018</td>
    <td style="vertical-align: bottom; border-bottom: Black 1pt solid; padding-right: 8.1pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: center">2017</td></tr>
<tr>
    <td style="vertical-align: top; padding-right: 0.55in; padding-left: 5.4pt; layout-grid-mode: line">Furniture and fixtures, net of accumulated depreciation</td>
    <td style="vertical-align: bottom; padding-right: -0.9pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: right">&#160;&#160;$&#160;&#160;&#160;38&#160;</td>
    <td style="vertical-align: bottom; padding-right: -0.9pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: right">&#160;&#160;$&#160;&#160;&#160;31&#160;</td></tr>
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    <td style="vertical-align: bottom; padding-right: -0.9pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: right">85&#160;</td>
    <td style="vertical-align: bottom; padding-right: -0.9pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: right">90&#160;</td></tr>
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    <td style="vertical-align: bottom; padding-right: -0.9pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: right">&#160;&#160;4&#160;</td>
    <td style="vertical-align: bottom; padding-right: -0.9pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: right">&#160;&#160;4&#160;</td></tr>
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<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
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<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div><p>The entire disclosure for other assets. This disclosure includes other current assets and other noncurrent assets.</p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;"><p>No definition available.</p></div>
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<span style="display: none;">v3.8.0.1</span><table class="report" border="0" cellspacing="2" id="idp6610063792">
<tr>
<th class="tl" colspan="1" rowspan="2"><div style="width: 200px;"><strong>Derivative Instruments<br></strong></div></th>
<th class="th" colspan="1">3 Months Ended</th>
</tr>
<tr><th class="th"><div>Mar. 31, 2018</div></th></tr>
<tr class="re">
<td class="pl " style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_DerivativeInstrumentsAndHedgingActivitiesDisclosureAbstract', window );"><strong>Derivative Instruments and Hedging Activities Disclosure [Abstract]</strong></a></td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl " style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_DerivativeInstrumentsAndHedgingActivitiesDisclosureTextBlock', window );">Derivative Instruments</a></td>
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<p style="font: 10pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0"><b>5.&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;Derivative
Instruments</b></p>

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<p style="font: 10pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0"><u>Vendetta Warrants</u></p>

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<p style="font: 10pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0; text-indent: 0.5in">During the three months ended March
31, 2017, Solitario exercised 2,240,000 of the Vendetta Warrants it held and received 2,240,000 Vendetta common shares, by paying
$167,000 (Cdn$224,000) to Vendetta. As a result, as of March 31, 2017, Solitario owned 5,000,000 Vendetta Warrants, which are carried
at fair value, based upon a Black-Scholes model. During the three months ended March 31, 2017, Solitario recorded a gain on derivative
instruments of $148,000, related to the Vendetta Warrants. Solitario owned no Vendetta Warrants during the three months ended March
31, 2018; see Note 3, &#8220;Marketable equity securities,&#8221; above.</p>

<p style="font: 10pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0">&#160;</p>

<p style="font: 10pt Times New Roman, Times, Serif; margin: 0 44.1pt 0 0"><u>Covered Call Options </u></p>

<p style="font: 10pt Times New Roman, Times, Serif; margin: 0 44.1pt 0 0">&#160;</p>

<p style="font: 10pt Times New Roman, Times, Serif; margin: 0 44.1pt 0 0; text-indent: 0.5in">From time to time Solitario has sold
covered call options against its holdings of Kinross. The business purpose of selling covered calls is to provide additional liquidity
on a limited portion of shares of Kinross that Solitario may sell in the near term, which is generally defined as less than one
year. Solitario has not designated its covered calls as hedging instruments and records gains or loss on the covered call in the
period of the change.</p>

<p style="font: 10pt Times New Roman, Times, Serif; margin: 0 44.1pt 0 0; text-indent: 0.5in">&#160;</p>

<p style="font: 10pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0; text-align: left">Solitario recorded the following gain
on derivative instruments:</p>

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    <td style="vertical-align: top; padding-right: 0.55in; padding-left: 5.4pt; layout-grid-mode: line">(in thousands)</td>
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        <p style="font: 10pt Times New Roman, Times, Serif; margin: 0 0.05in 0 0; text-align: center">Three months ended</p>
        <p style="font: 10pt Times New Roman, Times, Serif; margin: 0 0.05in 0 0; text-align: center">March 31,</p></td></tr>
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    <td style="vertical-align: top; width: 74%; padding-right: 0.55in; padding-left: 5.4pt; layout-grid-mode: line">&#160;</td>
    <td style="vertical-align: bottom; width: 13%; border-bottom: Black 1pt solid; padding-right: 5.4pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: center">&#160;2018</td>
    <td style="vertical-align: bottom; width: 13%; border-bottom: Black 1pt solid; padding-right: 5.4pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: center">&#160;2017</td></tr>
<tr>
    <td style="vertical-align: top; padding-right: 0.55in; padding-left: 5.4pt; layout-grid-mode: line">&#160;&#160;Gain (loss) on Kinross calls</td>
    <td style="vertical-align: bottom; padding-right: 0.05in; padding-left: 5.4pt; layout-grid-mode: line; text-align: right">&#160;$&#160;&#160;-&#160;&#160;&#160;</td>
    <td style="vertical-align: bottom; padding-right: 0.05in; padding-left: 5.4pt; layout-grid-mode: line; text-align: right">&#160;$&#160;&#160;24&#160;</td></tr>
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    <td style="vertical-align: top; padding-right: 0.55in; padding-left: 5.4pt; layout-grid-mode: line">&#160;&#160;Gain on Vendetta Warrants</td>
    <td style="vertical-align: bottom; border-bottom: Black 1pt solid; padding-right: 0.05in; padding-left: 5.4pt; layout-grid-mode: line; text-align: right">-&#160;&#160;&#160;</td>
    <td style="vertical-align: bottom; border-bottom: Black 1pt solid; padding-right: 0.05in; padding-left: 5.4pt; layout-grid-mode: line; text-align: right">148&#160;</td></tr>
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    <td style="vertical-align: top; padding-right: 0.55in; padding-left: 5.4pt; layout-grid-mode: line">&#160;</td>
    <td style="vertical-align: bottom; border-bottom: Black 1pt solid; padding-right: 0.05in; padding-left: 5.4pt; layout-grid-mode: line; text-align: right">$&#160;&#160;-&#160;&#160;&#160;</td>
    <td style="vertical-align: bottom; border-bottom: Black 1pt solid; padding-right: 0.05in; padding-left: 5.4pt; layout-grid-mode: line; text-align: right">$172&#160;</td></tr>
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<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
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<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div><p>The entire disclosure for derivative instruments and hedging activities including, but not limited to, risk management strategies, non-hedging derivative instruments, assets, liabilities, revenue and expenses, and methodologies and assumptions used in determining the amounts.</p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 815<br> -URI http://asc.fasb.org/topic&amp;trid=2229140<br></p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
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<span style="display: none;">v3.8.0.1</span><table class="report" border="0" cellspacing="2" id="idp6616795264">
<tr>
<th class="tl" colspan="1" rowspan="2"><div style="width: 200px;"><strong>Fair Value<br></strong></div></th>
<th class="th" colspan="1">3 Months Ended</th>
</tr>
<tr><th class="th"><div>Mar. 31, 2018</div></th></tr>
<tr class="re">
<td class="pl " style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_FairValueDisclosuresAbstract', window );"><strong>Fair Value Disclosures [Abstract]</strong></a></td>
<td class="text">&#160;<span></span>
</td>
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<tr class="ro">
<td class="pl " style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_FairValueDisclosuresTextBlock', window );">Fair Value</a></td>
<td class="text"><p style="margin: 0pt"></p>

<p style="font: 10pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0"><b>6.&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;Fair
Value</b></p>

<p style="font: 10pt/12pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0; background-color: white">&#160;</p>

<p style="font: 10pt/12pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0; text-indent: 0.5in; background-color: white">For
certain of Solitario&#8217;s financial instruments, including cash and cash equivalents and payables, the carrying amounts approximate
fair value due to their short-term maturities. Solitario&#8217;s short-term investments in CD&#8217;s and USTS, Kinross calls and
marketable equity securities are carried at their estimated fair value primarily based on quoted market prices.</p>

<p style="font: 10pt/12pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0; background-color: white">&#160;</p>

<p style="font: 10pt/12pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0; text-indent: 0.5in; background-color: white">Solitario
accounts for its financial instruments under ASC 820. ASC 820 establishes a framework for measuring fair value and requires enhanced
disclosures about fair value measurements. ASC 820 clarifies that fair value is an exit price, representing the amount that would
be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants. ASC 820 also
requires disclosure about how fair value is determined for assets and liabilities and establishes a hierarchy for which these assets
and liabilities must be grouped, based on significant levels of inputs as follows:</p>

<p style="font: 10pt/12pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0; background-color: white">&#160;</p>

<table cellpadding="0" cellspacing="0" style="width: 100%; font: 11pt/115% Calibri, Helvetica, Sans-Serif; margin-top: 0; margin-bottom: 0"><tr style="vertical-align: top">
<td style="width: 0.25in"></td><td style="width: 0.25in"><font style="font: 10pt Symbol">&#183;</font></td><td style="padding-right: 0.55in"><font style="font: 10pt Times New Roman, Times, Serif"><b>Level 1</b>: quoted
prices in active markets for identical assets or liabilities;</font></td></tr></table>

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<td style="width: 0.25in"></td><td style="width: 0.25in"><font style="font: 10pt Symbol">&#183;</font></td><td style="padding-right: 0.55in"><font style="font: 10pt Times New Roman, Times, Serif"><b>Level 2</b>: quoted
prices in active markets for similar assets and liabilities and inputs that are observable for the asset or liability; or</font></td></tr></table>

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<td style="width: 0.25in"></td><td style="width: 0.25in"><font style="font: 10pt Symbol">&#183;</font></td><td style="padding-right: 0.55in"><font style="font: 10pt Times New Roman, Times, Serif"><b>Level 3</b>: Unobservable
inputs in which there is little or no market data, which require the reporting entity to develop its own assumptions.</font></td></tr></table>

<p style="font: 10pt/12pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0; background-color: white">&#160;</p>

<p style="font: 10pt/12pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0; text-indent: 0.5in; background-color: white">The
determination of where assets and liabilities fall within this hierarchy is based upon the lowest level of input that is significant
to the fair value measurement. During the three months ended March 31, 2018 there were no reclassifications in financial assets
or liabilities between Level 1, 2 or 3 categories.</p>

<p style="font: 10pt/12pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0; background-color: white">&#160;</p>

<p style="font: 10pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0; text-indent: 0.5in">The following is a listing of Solitario&#8217;s
financial assets and liabilities required to be measured at fair value on a recurring basis and where they are classified within
the hierarchy as of March 31, 2018:</p>

<p style="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify">&#160;</p>

<table cellspacing="0" cellpadding="0" style="font: 10pt Times New Roman, Times, Serif; width: 100%; border-collapse: collapse">
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    <td style="width: 48%; layout-grid-mode: line; text-align: justify">(in thousands)</td>
    <td style="width: 13%; border-bottom: Black 1pt solid; padding-right: 6pt; layout-grid-mode: line; text-align: right">Level 1&#160;&#160;</td>
    <td style="width: 14%; border-bottom: Black 1pt solid; padding-right: 8.25pt; layout-grid-mode: line; text-align: right">Level 2&#160;&#160;</td>
    <td style="width: 12%; border-bottom: Black 1pt solid; padding-right: 3pt; layout-grid-mode: line; text-align: right">Level 3</td>
    <td style="width: 13%; border-bottom: Black 1pt solid; padding-right: 5.25pt; layout-grid-mode: line; text-align: right">Total&#160;&#160;</td></tr>
<tr style="vertical-align: bottom">
    <td style="layout-grid-mode: line"><b>Assets</b></td>
    <td style="padding-right: 6pt; layout-grid-mode: line; text-align: right">&#160;</td>
    <td style="padding-right: 8.25pt; layout-grid-mode: line; text-align: right">&#160;</td>
    <td style="padding-right: 3pt; layout-grid-mode: line; text-align: right">&#160;</td>
    <td style="padding-right: 5.25pt; layout-grid-mode: line; text-align: right">&#160;</td></tr>
<tr style="vertical-align: bottom">
    <td style="layout-grid-mode: line">&#160;&#160;Marketable equity securities</td>
    <td style="padding-right: 6pt; layout-grid-mode: line; text-align: right">$&#160;&#160;2,202&#160;</td>
    <td style="padding-right: 8.25pt; layout-grid-mode: line; text-align: right">$&#160;&#160;&#160;&#160;&#160;&#160;-&#160;&#160;&#160;&#160;&#160;</td>
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    <td style="padding-right: 5.25pt; layout-grid-mode: line; text-align: right">$&#160;&#160;2,202&#160;</td></tr>
<tr style="vertical-align: bottom">
    <td style="layout-grid-mode: line">&#160;&#160;United States Treasury securities</td>
    <td style="padding-right: 6pt; layout-grid-mode: line; text-align: right">9,976&#160;</td>
    <td style="padding-right: 8.25pt; layout-grid-mode: line; text-align: right">-&#160;&#160;&#160;&#160;&#160;</td>
    <td style="padding-right: 3pt; layout-grid-mode: line; text-align: right">-&#160;&#160;&#160;</td>
    <td style="padding-right: 5.25pt; layout-grid-mode: line; text-align: right">9,976&#160;</td></tr>
<tr style="vertical-align: bottom">
    <td style="layout-grid-mode: line">&#160;&#160;Bank Certificates of Deposit</td>
    <td style="padding-right: 6pt; layout-grid-mode: line; text-align: right">1,247&#160;</td>
    <td style="padding-right: 8.25pt; layout-grid-mode: line; text-align: right">-&#160;&#160;&#160;&#160;&#160;</td>
    <td style="padding-right: 3pt; layout-grid-mode: line; text-align: right">-&#160;&#160;&#160;</td>
    <td style="padding-right: 5.25pt; layout-grid-mode: line; text-align: right">1,247&#160;</td></tr>
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<p style="font: 10pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0">&#160;</p>

<p style="font: 10pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0; text-indent: 0.5in">The following is a listing of Solitario&#8217;s
financial assets and liabilities required to be measured at fair value on a recurring basis and where they are classified within
the hierarchy as of December 31, 2017:</p>

<p style="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify">&#160;</p>

<table cellspacing="0" cellpadding="0" style="font: 10pt Times New Roman, Times, Serif; width: 100%; border-collapse: collapse">
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    <td style="width: 48%; layout-grid-mode: line; text-align: justify">(in thousands)</td>
    <td style="width: 13%; border-bottom: Black 1pt solid; padding-right: 6pt; layout-grid-mode: line; text-align: center">Level 1</td>
    <td style="width: 14%; border-bottom: Black 1pt solid; padding-right: 8.25pt; layout-grid-mode: line; text-align: center">Level 2</td>
    <td style="width: 12%; border-bottom: Black 1pt solid; padding-right: 3pt; layout-grid-mode: line; text-align: center">Level 3</td>
    <td style="width: 13%; border-bottom: Black 1pt solid; padding-right: 5.25pt; layout-grid-mode: line; text-align: center">Total</td></tr>
<tr style="vertical-align: bottom">
    <td style="layout-grid-mode: line"><b>Assets</b></td>
    <td style="padding-right: 6pt; layout-grid-mode: line; text-align: right">&#160;</td>
    <td style="padding-right: 8.25pt; layout-grid-mode: line; text-align: right">&#160;</td>
    <td style="padding-right: 3pt; layout-grid-mode: line; text-align: right">&#160;</td>
    <td style="padding-right: 5.25pt; layout-grid-mode: line; text-align: right">&#160;</td></tr>
<tr style="vertical-align: bottom">
    <td style="layout-grid-mode: line">&#160;&#160;Marketable equity securities</td>
    <td style="padding-right: 6pt; layout-grid-mode: line; text-align: right">$2,643&#160;</td>
    <td style="padding-right: 8.25pt; layout-grid-mode: line; text-align: right">$&#160;&#160;&#160;-&#160;&#160;&#160;</td>
    <td style="padding-right: 3pt; layout-grid-mode: line; text-align: right">$&#160;&#160;-&#160;&#160;&#160;</td>
    <td style="padding-right: 5.25pt; layout-grid-mode: line; text-align: right">$2,643&#160;</td></tr>
<tr style="vertical-align: bottom">
    <td style="layout-grid-mode: line">&#160;&#160;United States Treasury securities</td>
    <td style="padding-right: 6pt; layout-grid-mode: line; text-align: right">10,395&#160;</td>
    <td style="padding-right: 3pt; layout-grid-mode: line; text-align: right">-&#160;&#160;&#160;&#160;&#160;</td>
    <td style="padding-right: 3pt; layout-grid-mode: line; text-align: right">-&#160;&#160;&#160;</td>
    <td style="padding-right: 5.25pt; layout-grid-mode: line; text-align: right">10,395&#160;</td></tr>
<tr style="vertical-align: bottom">
    <td style="layout-grid-mode: line">&#160;&#160;Bank Certificates of Deposit</td>
    <td style="padding-right: 6pt; layout-grid-mode: line; text-align: right">1,247&#160;</td>
    <td style="padding-right: 3pt; layout-grid-mode: line; text-align: right">-&#160;&#160;&#160;&#160;&#160;</td>
    <td style="padding-right: 3pt; layout-grid-mode: line; text-align: right">-&#160;&#160;&#160;</td>
    <td style="padding-right: 5.25pt; layout-grid-mode: line; text-align: right">1,247&#160;</td></tr>
</table>
<p style="font: 10pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0">&#160;</p>



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<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- References</a><div><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
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<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div><p>The entire disclosure for the fair value of financial instruments (as defined), including financial assets and financial liabilities (collectively, as defined), and the measurements of those instruments as well as disclosures related to the fair value of non-financial assets and liabilities. Such disclosures about the financial instruments, assets, and liabilities would include: (1) the fair value of the required items together with their carrying amounts (as appropriate); (2) for items for which it is not practicable to estimate fair value, disclosure would include: (a) information pertinent to estimating fair value (including, carrying amount, effective interest rate, and maturity, and (b) the reasons why it is not practicable to estimate fair value; (3) significant concentrations of credit risk including: (a) information about the activity, region, or economic characteristics identifying a concentration, (b) the maximum amount of loss the entity is exposed to based on the gross fair value of the related item, (c) policy for requiring collateral or other security and information as to accessing such collateral or security, and (d) the nature and brief description of such collateral or security; (4) quantitative information about market risks and how such risks are managed; (5) for items measured on both a recurring and nonrecurring basis information regarding the inputs used to develop the fair value measurement; and (6) for items presented in the financial statement for which fair value measurement is elected: (a) information necessary to understand the reasons for the election, (b) discussion of the effect of fair value changes on earnings, (c) a description of [similar groups] items for which the election is made and the relation thereof to the balance sheet, the aggregate carrying value of items included in the balance sheet that are not eligible for the election; (7) all other required (as defined) and desired information.</p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 820<br> -URI http://asc.fasb.org/topic&amp;trid=2155941<br></p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
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<span style="display: none;">v3.8.0.1</span><table class="report" border="0" cellspacing="2" id="idp6796414512">
<tr>
<th class="tl" colspan="1" rowspan="2"><div style="width: 200px;"><strong>Income Taxes<br></strong></div></th>
<th class="th" colspan="1">3 Months Ended</th>
</tr>
<tr><th class="th"><div>Mar. 31, 2018</div></th></tr>
<tr class="re">
<td class="pl " style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_IncomeTaxDisclosureAbstract', window );"><strong>Income Tax Disclosure [Abstract]</strong></a></td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl " style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_IncomeTaxDisclosureTextBlock', window );">Income Taxes</a></td>
<td class="text"><p style="margin: 0pt"></p>

<p style="font: 10pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0"><b>7.&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;Income
Taxes</b></p>

<p style="font: 10pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0">&#160;</p>

<p style="font: 10pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0; text-indent: 0.5in">Solitario accounts for income taxes
in accordance with ASC 740. Under ASC 740, income taxes are provided for the tax effects of transactions reported in the financial
statements and consist of taxes currently due plus deferred taxes related to certain income and expenses recognized in different
periods for financial and income tax reporting purposes. Deferred tax assets and liabilities represent the future tax return consequences
of those differences, which will either be taxable or deductible when the assets and liabilities are recovered or settled. Deferred
taxes are also recognized for operating losses and tax credits that are available to offset future taxable income and income taxes,
respectively. A valuation allowance is provided if it is more likely than not that some portion or all of the deferred tax assets
will not be realized.</p>

<p style="font: 10pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0">&#160;</p>

<p style="font: 10pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0; text-indent: 0.5in">At March 31, 2018 and December 31,
2017, a valuation allowance has been recorded, which fully offsets Solitario&#8217;s net deferred tax assets, because it is more
likely than not that the Company will not realize some portion or all of its deferred tax assets.&#160; The Company continually
assesses both positive and negative evidence to determine whether it is more likely than not that the deferred tax assets can be
realized prior to their expiration.</p>

<p style="font: 10pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0; text-indent: 0.5in">&#160;</p>

<p style="font: 10pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0; text-indent: 0.5in">During the three months ended March
31, 2018 and 2017, Solitario recorded no deferred tax expense.</p>



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<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
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<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div><p>The entire disclosure for income taxes. Disclosures may include net deferred tax liability or asset recognized in an enterprise's statement of financial position, net change during the year in the total valuation allowance, approximate tax effect of each type of temporary difference and carryforward that gives rise to a significant portion of deferred tax liabilities and deferred tax assets, utilization of a tax carryback, and tax uncertainties information.</p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 740<br> -URI http://asc.fasb.org/topic&amp;trid=2144680<br></p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
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<span style="display: none;">v3.8.0.1</span><table class="report" border="0" cellspacing="2" id="idp6616758576">
<tr>
<th class="tl" colspan="1" rowspan="2"><div style="width: 200px;"><strong>Employee Stock Compensation Plans<br></strong></div></th>
<th class="th" colspan="1">3 Months Ended</th>
</tr>
<tr><th class="th"><div>Mar. 31, 2018</div></th></tr>
<tr class="re">
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<td class="text">&#160;<span></span>
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<tr class="ro">
<td class="pl " style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_DisclosureOfCompensationRelatedCostsShareBasedPaymentsTextBlock', window );">Employee Stock Compensation Plans</a></td>
<td class="text"><p style="margin: 0pt"></p>

<p style="font: 10pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0"><b>8.&#160;&#160;&#160;&#160;&#160;&#160;&#160;Employee
Stock Compensation Plans</b></p>

<p style="font: 10pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0">&#160;</p>

<p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0"><i>The 2013 Plan</i></p>

<p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0; text-indent: 0.5in">&#160;</p>

<p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0; text-indent: 0.5in">On June 18, 2013, Solitario&#8217;s
shareholders approved the 2013 Solitario Exploration &#38; Royalty Corp. Omnibus Stock and Incentive Plan (the &#8220;2013 Plan&#8221;).
Under the terms of the 2013 Plan, a total of 1,750,000 shares of Solitario common stock are reserved for awards to Directors, officers,
employees and consultants. On June 29, 2017, Solitario shareholders approved an amendment to the 2013 Plan, which increased the
number of shares of common stock available for issuance under the 2013 Plan from 1,750,000 to 5,750,000. Awards granted under the
2013 Plan may take the form of stock options, stock appreciation rights, restricted stock, and restricted stock units. The terms
and conditions of the awards are pursuant to the 2013 Plan and are granted by the Board of Directors or a committee appointed by
the Board of Directors.</p>

<p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0">&#160;</p>

<p style="font: 10pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0; text-indent: 0.5in">As of March 31, 2018,
and December 31, 2017 there were 2,082,428 and 1,928,428 options outstanding for Solitario common shares granted during 2017
with exercise prices between $0.54 per share and $1.74 per share. Of these, 1,728,428 shares were Replacement Options granted
in connection with the Acquisition. There were no stock grants or awards or exercises of options or awards under the 2013
Plan during the three months ended March 31, 2018 and 2017. During the three months ended March 31, 2018, Solitario recorded
stock option compensation expense of $10,000. Solitario had no stock options outstanding and recorded no stock option
compensation expense during the three months ended March 31, 2017.</p>

<p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0; text-indent: 0.5in">&#160;</p>

<p style="font: 10pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0; text-indent: 0.5in">On September 1, 2017, the Board of
Directors granted, subject to shareholder approval at the next meeting of shareholders, an additional 2,300,000 stock options under
the 2013 Plan to officers and members of the board of directors (the &#8220;Conditional Options&#8221;). The Conditional Options
have a five-year life, and exercise price of $0.77 per share, and a grant date fair value of $970,000, based upon a Black-Scholes
model with a volatility of 64%, and a risk-free interest rate of 1.70%. If approved, the Conditional Options will vest on the schedule
of 25% on date of grant and 25% on each of the next three anniversary dates of the date of grant. The Conditional Options will
not become exercisable in whole or in part unless Solitario shareholders approve the grants, and the option grants will be void
if Solitario shareholders do not approve the grants. Solitario will not record any stock option expense related to these options
until the shareholder approval is received.</p>

<p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0; text-indent: 0.5in">&#160;</p>



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<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div><p>The entire disclosure for compensation-related costs for equity-based compensation, which may include disclosure of policies, compensation plan details, allocation of equity compensation, incentive distributions, equity-based arrangements to obtain goods and services, deferred compensation arrangements, employee stock ownership plan details and employee stock purchase plan details.</p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 718<br> -URI http://asc.fasb.org/topic&amp;trid=2228938<br><br>Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 505<br> -SubTopic 50<br> -URI http://asc.fasb.org/subtopic&amp;trid=2208855<br></p></div>
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<span style="display: none;">v3.8.0.1</span><table class="report" border="0" cellspacing="2" id="idp6632373072">
<tr>
<th class="tl" colspan="1" rowspan="2"><div style="width: 200px;"><strong>Shareholders' Equity and Other Comprehensive Income<br></strong></div></th>
<th class="th" colspan="1">3 Months Ended</th>
</tr>
<tr><th class="th"><div>Mar. 31, 2018</div></th></tr>
<tr class="re">
<td class="pl " style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_XPL_NotesToFinancialStatementsAbstract', window );"><strong>Notes to Financial Statements</strong></a></td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl custom" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_XPL_ShareholdersEquityNoteDisclosureTextBlock', window );">Shareholders' Equity and Accumulated Other Comprehensive Income</a></td>
<td class="text"><p style="font: 10pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0"><b>9.&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;Shareholders&#8217;
Equity and Accumulated Other Comprehensive Income</b></p>

<p style="font: 10pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0">&#160;</p>

<p style="font: 10pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0">&#160;</p>

<table cellspacing="0" cellpadding="0" style="font: 10pt Times New Roman, Times, Serif; width: 100%; border-collapse: collapse">
<tr>
    <td style="vertical-align: top; width: 32%; padding-right: 5.4pt; padding-left: 5.4pt; font-family: Courier New, Courier, Monospace"><font style="font-family: Times New Roman, Times, Serif">(in thousands, except</font></td>
    <td style="vertical-align: bottom; width: 10%; padding-right: -5.4pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: center">&#160;</td>
    <td style="vertical-align: bottom; width: 9%; padding-right: 5.4pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: center">&#160;</td>
    <td style="vertical-align: bottom; width: 11%; padding-right: 5.4pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: center">&#160;</td>
    <td style="vertical-align: bottom; width: 12%; padding-right: 5.4pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: center">&#160;</td>
    <td style="vertical-align: bottom; width: 14%; padding-right: -5.4pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: center">Accumulated</td>
    <td style="vertical-align: bottom; width: 12%; padding-right: -5.4pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: center">&#160;</td></tr>
<tr>
    <td style="vertical-align: top; padding-right: 5.4pt; padding-left: 5.4pt; layout-grid-mode: line">Share amounts)</td>
    <td style="vertical-align: bottom; padding-right: -5.4pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: center">Common</td>
    <td style="vertical-align: bottom; padding-right: -5.4pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: center">Common</td>
    <td style="vertical-align: bottom; padding-right: -5.4pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: center; text-indent: -5.4pt">Additional</td>
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    <td style="vertical-align: bottom; padding-right: -5.4pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: center">Other</td>
    <td style="vertical-align: bottom; padding-right: -5.4pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: center">Total</td></tr>
<tr>
    <td style="vertical-align: top; padding-right: 5.4pt; padding-left: 5.4pt; layout-grid-mode: line">&#160;</td>
    <td style="vertical-align: bottom; padding-right: -5.4pt; padding-left: 5.4pt; text-align: center; font-family: CG Times (W1)"><font style="font-family: Times New Roman, Times, Serif">Stock</font></td>
    <td style="vertical-align: bottom; padding-right: -5.4pt; padding-left: 5.4pt; text-align: center; font-family: CG Times (W1)"><font style="font-family: Times New Roman, Times, Serif">Stock</font></td>
    <td style="vertical-align: bottom; padding-right: -5.4pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: center; text-indent: -5.4pt">Paid-in</td>
    <td style="vertical-align: bottom; padding-right: -5.4pt; padding-left: 5.4pt; text-align: center; font-family: CG Times (W1)"><font style="font-family: Times New Roman, Times, Serif">Accumulated</font></td>
    <td style="vertical-align: bottom; padding-right: -5.4pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: center">Comprehensive</td>
    <td style="vertical-align: bottom; padding-right: -5.4pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: center">Shareholders&#8217;</td></tr>
<tr>
    <td style="vertical-align: top; padding-right: 5.4pt; padding-left: 5.4pt; layout-grid-mode: line">&#160;</td>
    <td style="vertical-align: bottom; border-bottom: Black 1pt solid; padding-right: -5.4pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: center">Shares</td>
    <td style="vertical-align: bottom; border-bottom: Black 1pt solid; padding-right: -5.4pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: center">Amount</td>
    <td style="vertical-align: bottom; border-bottom: Black 1pt solid; padding-right: -5.4pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: center; text-indent: -5.4pt">Capital</td>
    <td style="vertical-align: bottom; border-bottom: Black 1pt solid; padding-right: -5.4pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: center">Deficit</td>
    <td style="vertical-align: bottom; border-bottom: Black 1pt solid; padding-right: -5.4pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: center">Income</td>
    <td style="vertical-align: bottom; border-bottom: Black 1pt solid; padding-right: -5.4pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: center">Equity</td></tr>
<tr style="vertical-align: bottom">
    <td style="padding-right: 5.4pt; padding-left: 5.4pt; layout-grid-mode: line"><b>Balance at December 31, 2017</b></td>
    <td style="padding-right: 5.4pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: right"><b>58,434,566</b></td>
    <td style="padding-right: -0.75pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: right"><b>584&#160;</b></td>
    <td style="padding-right: 5.4pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: right"><b>$69,312&#160;</b></td>
    <td style="padding-right: 3.75pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: right"><b>$(40,343)</b></td>
    <td style="padding-right: 3.75pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: right"><b>$&#160;&#160;&#160;576&#160;</b></td>
    <td style="padding-right: 2.15pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: right"><b>$30,129&#160;</b></td></tr>
<tr>
    <td style="vertical-align: top; padding-right: 5.4pt; padding-left: 5.4pt">
        <p style="font: 10pt Times New Roman, Times, Serif; margin: 0">Cumulative-effect adjustment</p>
        <p style="font: 10pt Times New Roman, Times, Serif; margin: 0">change in accounting principle</p></td>
    <td style="vertical-align: bottom; border-bottom: Black 1pt solid; padding-right: 5.4pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: right"><b>- &#160;&#160;</b></td>
    <td style="vertical-align: bottom; border-bottom: Black 1pt solid; padding-right: -0.75pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: right"><b>- &#160;&#160;</b></td>
    <td style="vertical-align: bottom; border-bottom: Black 1pt solid; padding-right: 5.4pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: right"><b>- &#160;&#160;</b></td>
    <td style="vertical-align: bottom; border-bottom: Black 1pt solid; padding-right: 3.75pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: right">576&#160;</td>
    <td style="vertical-align: bottom; border-bottom: Black 1pt solid; padding-right: 3.75pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: right">(576)</td>
    <td style="vertical-align: bottom; border-bottom: Black 1pt solid; padding-right: 3.75pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: right"><b>-&#160;&#160;</b></td></tr>
<tr>
    <td style="vertical-align: top; padding-right: 5.4pt; padding-left: 5.4pt; layout-grid-mode: line"><b>Adjusted balance January 1, 2018</b></td>
    <td style="vertical-align: bottom; padding-right: 5.4pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: right"><b>58,434,566</b></td>
    <td style="vertical-align: bottom; padding-right: -0.75pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: right"><b>584</b></td>
    <td style="vertical-align: bottom; padding-right: 5.4pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: right"><b>69,312&#160;</b></td>
    <td style="vertical-align: bottom; padding-right: 3.75pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: right"><b>(39,767)</b></td>
    <td style="vertical-align: bottom; padding-right: 3.75pt; padding-left: 26.2pt; layout-grid-mode: line; text-align: right"><b>- &#160;&#160;</b></td>
    <td style="vertical-align: bottom; padding-right: 2.15pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: right"><b>30,129&#160;</b></td></tr>
<tr>
    <td style="vertical-align: top; padding-right: 5.4pt; padding-left: 5.4pt; layout-grid-mode: line">Stock option expense</td>
    <td style="vertical-align: bottom; padding-right: 5.4pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: right"><b>- &#160;&#160;</b></td>
    <td style="vertical-align: bottom; padding-right: -0.75pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: right"><b>- &#160;&#160;</b></td>
    <td style="vertical-align: bottom; padding-right: 5.4pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: right">10<b>&#160;</b></td>
    <td style="vertical-align: bottom; padding-right: 3.75pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: right"><b>- &#160;&#160;</b></td>
    <td style="vertical-align: bottom; padding-right: 3.75pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: right"><b>- &#160;&#160;</b></td>
    <td style="vertical-align: bottom; padding-right: 2.15pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: right">10&#160;</td></tr>
<tr>
    <td style="vertical-align: top; padding-right: 5.4pt; padding-left: 5.4pt; layout-grid-mode: line">Purchase of shares for cancellation</td>
    <td style="vertical-align: bottom; padding-right: 5.4pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: right">(52,614)</td>
    <td style="vertical-align: bottom; padding-right: -0.75pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: right">-&#160;&#160;&#160;</td>
    <td style="vertical-align: bottom; padding-right: 5.4pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: right">(26)</td>
    <td style="vertical-align: bottom; padding-right: 3.75pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: right">-&#160;&#160;&#160;</td>
    <td style="vertical-align: bottom; padding-right: 3.75pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: right">-&#160;&#160;&#160;</td>
    <td style="vertical-align: bottom; padding-right: 2.15pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: right">(26)</td></tr>
<tr>
    <td style="vertical-align: top; padding-right: 5.4pt; padding-left: 5.4pt; layout-grid-mode: line">Net loss</td>
    <td style="vertical-align: bottom; padding-right: 5.4pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: right">-&#160;&#160;&#160;</td>
    <td style="vertical-align: bottom; padding-right: -0.75pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: right">-&#160;&#160;&#160;</td>
    <td style="vertical-align: bottom; padding-right: 5.4pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: right">-&#160;&#160;&#160;</td>
    <td style="vertical-align: bottom; padding-right: 3.75pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: right">(1,004)</td>
    <td style="vertical-align: bottom; padding-right: 3.75pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: right">-&#160;&#160;&#160;</td>
    <td style="vertical-align: bottom; padding-right: 2.15pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: right">(1,004)</td></tr>
<tr>
    <td style="vertical-align: top; padding-right: 5.4pt; padding-left: 5.4pt; layout-grid-mode: line"><b>Balance at March 31, 2018 </b></td>
    <td style="vertical-align: bottom; border-top: Black 1pt solid; border-bottom: Black 1pt solid; padding-right: 5.4pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: right"><b>58,381,952</b></td>
    <td style="vertical-align: bottom; border-top: Black 1pt solid; border-bottom: Black 1pt solid; padding-right: -0.75pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: right"><b>$584</b></td>
    <td style="vertical-align: bottom; border-top: Black 1pt solid; border-bottom: Black 1pt solid; padding-right: 5.4pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: right"><b>$69,296&#160;</b></td>
    <td style="vertical-align: bottom; border-top: Black 1pt solid; border-bottom: Black 1pt solid; padding-right: 3.75pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: right"><b>$(40,771)</b></td>
    <td style="vertical-align: bottom; border-top: Black 1pt solid; border-bottom: Black 1pt solid; padding-right: 3.75pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: right"><b>$&#160;&#160;&#160;&#160;-&#160;&#160;&#160;&#160;&#160;</b></td>
    <td style="vertical-align: bottom; border-top: Black 1pt solid; border-bottom: Black 1pt solid; padding-right: 2.15pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: right"><b>$29,109&#160;</b></td></tr>
</table>
<p style="font: 10pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0">&#160;</p>

<p style="font: 10pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0; text-indent: 0.5in">Solitario adopted ASU No. 2016-01
in the first quarter of 2018. Solitario recorded a cumulative-effect adjustment for the change in accounting principle to retained
earnings of $576,000 related to the adoption of ASU 2016-01. In addition, Solitario eliminated its previously recorded gain on
sale of marketable equity securities of $221,000 in its consolidated statement of operations for the three months ended March 31,
2017 resulting in an adjusted unrealized gain on marketable equity securities of $128,000 for the three months ended March 31,
2017 as a result of the adoption of ASU 2016-01. These changes increased the net loss for the three months ended March 31, 2017
from $13,000 to $106,000. These changes as a result of the adoption of ASU 2016-01 were similarly reflected in the adjustment to
net income for marketable equity securities in the statement of cash flows for the three months ended March 31, 2017.</p>

<p style="font: 10pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0; text-indent: 0.5in">&#160;</p>

<p style="font: 10pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0"><u>Share Repurchase Program</u></p>

<p style="font: 10pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0">&#160;</p>

<p style="font: 10pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0; text-indent: 0.5in">On October 28, 2015, Solitario&#8217;s
Board of Directors approved a share repurchase program that authorized Solitario to purchase up to two million shares of its outstanding
common stock. During 2017, Solitario&#8217;s Board of Directors extended the expiration date of the share repurchase program through
December 31, 2018. During the three months ended March 31, 2018 and 2017, Solitario purchased 52,614 and 8,400 shares of Solitario
common stock, respectively, for an aggregate purchase price of $26,000 and $6,000, respectively. As of March 31, 2018, Solitario
has purchased a total of 720,414 shares for an aggregate purchase price of $374,000 under the share repurchase program since its
inception.</p><span></span>
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<span style="display: none;">v3.8.0.1</span><table class="report" border="0" cellspacing="2" id="idp6796418320">
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<th class="tl" colspan="1" rowspan="2"><div style="width: 200px;"><strong>Subsequent Event<br></strong></div></th>
<th class="th" colspan="1">3 Months Ended</th>
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<td class="pl " style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_SubsequentEventsAbstract', window );"><strong>Subsequent Events [Abstract]</strong></a></td>
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<td class="pl " style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_SubsequentEventsTextBlock', window );">Subsequent Event</a></td>
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<p style="margin: 0"><font style="font: 10pt Times New Roman, Times, Serif">On April 27, 2018 Solitario, through
its wholly-owned subsidiary, Minera Solitario Peru, S.A.C., sold its non-producing Yanacocha royalty to Minera Los Topados S.A.,
a wholly-owned subsidiary of Newmont Mining Corporation for $502,000 in cash.</font></p>



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<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div><p>The entire disclosure for significant events or transactions that occurred after the balance sheet date through the date the financial statements were issued or the date the financial statements were available to be issued. Examples include: the sale of a capital stock issue, purchase of a business, settlement of litigation, catastrophic loss, significant foreign exchange rate changes, loans to insiders or affiliates, and transactions not in the ordinary course of business.</p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 855<br> -URI http://asc.fasb.org/topic&amp;trid=2122774<br></p></div>
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<span style="display: none;">v3.8.0.1</span><table class="report" border="0" cellspacing="2" id="idp6625275888">
<tr>
<th class="tl" colspan="1" rowspan="2"><div style="width: 200px;"><strong>Business and Significant Accounting Policies (Policies)<br></strong></div></th>
<th class="th" colspan="1">3 Months Ended</th>
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<tr><th class="th"><div>Mar. 31, 2018</div></th></tr>
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<td class="pl " style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_AccountingPoliciesAbstract', window );"><strong>Accounting Policies [Abstract]</strong></a></td>
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<td class="pl " style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_OrganizationConsolidationBasisOfPresentationBusinessDescriptionAndAccountingPoliciesTextBlock', window );">1. Business and Significant Accounting Policies</a></td>
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<p style="font: 10pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0"><b>1.&#160;&#160;&#160;&#160;&#160;&#160;&#160;Business
and Significant Accounting Policies</b></p>

<p style="font: 10pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0">&#160;</p>

<p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0"><i>Business and company formation</i></p>

<p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0">&#160;</p>

<p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0; text-indent: 0.5in">Solitario Zinc Corp. (&#8220;Solitario,&#8221;
or the &#8220;Company&#8221;) is an exploration stage company as defined in Industry Guide 7, as issued by the United States Securities
and Exchange Commission (&#8220;SEC&#8221;). Solitario was incorporated in the state of Colorado on November 15, 1984 as a wholly-owned
subsidiary of Crown Resources Corporation (&#34;Crown&#34;). In July 1994, Solitario became a publicly traded company on the Toronto
Stock Exchange (the &#34;TSX&#34;) through its initial public offering. Solitario has been actively involved in mineral exploration
since 1993. Solitario&#8217;s primary business is to acquire exploration mineral properties or royalties and/or discover economic
deposits on its mineral properties and advance these deposits, either on its own or through joint ventures, up to the development
stage. At that point, or sometime prior to that point, Solitario would likely attempt to sell its mineral properties, pursue their
development either on its own, or through a joint venture with a partner that has expertise in mining operations, or create a royalty
with a third party that continues to advance the property. As a result of the Acquisition (defined below), Solitario is now primarily
focused on the acquisition and exploration of zinc-related exploration mineral properties. In addition to focusing on its mineral
exploration properties and the evaluation of mineral properties for acquisition or purchase of royalty interests, Solitario also
evaluates potential strategic transactions for the acquisition of new precious and base metal properties and assets with exploration
potential or business combinations that Solitario determines to be favorable to Solitario.</p>

<p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0; text-indent: 0.5in">&#160;</p>

<p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0; text-indent: 0.5in">Solitario has recorded revenue in
the past from the sale of mineral property, including the sale in 2015 of its former interest in Mount Hamilton LLC (&#8220;MH-LLC&#8221;)
the owner of its former Mt. Hamilton project (the &#8220;Mt. Hamilton Transaction&#8221;), and joint venture property payments
and the sale of a royalty on its former Mt. Hamilton project. Revenues from the sale or joint venture of properties or assets,
although significant when they occur, have not been a consistent annual source of revenue and would only occur in the future, if
at all, on an infrequent basis.</p>

<p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0; text-indent: 0.5in">&#160;</p>

<p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0; text-indent: 0.5in">Solitario currently considers its
carried interest in the Florida Canyon project and its interest in the Lik project to be its core mineral property assets. Solitario&#8217;s
joint venture partner is expected to continue the development and furtherance of the Florida Canyon project and Solitario will
monitor progress at Florida Canyon. Solitario is working with its 50% joint venture partner, Teck American Incorporated, a wholly-owned
subsidiary of Teck Resources Limited ( both companies referred to as &#8220;Teck&#8221;), in the Lik deposit to further the exploration
and evaluate potential development plans for the Lik project.</p>

<p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0; text-indent: 0.5in">&#160;</p>

<p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0; text-indent: 0.5in"><font style="color: windowtext">As
of March 31, 2018, Solitario has significant balances of cash and short-term investments that Solitario anticipates using, in part,
to further the development of the Florida Canyon and Lik projects and to potentially acquire additional mineral property assets.
The</font> fluctuations in precious metal and other commodity prices contribute to a challenging environment for mineral exploration
and development, which has created opportunities as well as challenges for the potential acquisition of early-stage and advanced
mineral exploration projects or other related assets at potentially attractive terms.</p>

<p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0; text-indent: 0.5in">&#160;</p>

<p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0; text-indent: 0.5in">The accompanying interim condensed
consolidated financial statements of Solitario for the three months ended March 31, 2018 are unaudited and are prepared in accordance
with accounting principles generally accepted in the United States of America (&#8220;generally accepted accounting principles&#8221;).
They do not include all disclosures required by generally accepted accounting principles for annual financial statements, but in
the opinion of management, include all adjustments, consisting only of normal recurring items, necessary for a fair presentation.
Interim results are not necessarily indicative of results, which may be achieved in the future or for the full year ending December
31, 2018.</p>

<p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0">&#160;</p>

<p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0; text-indent: 0.5in">These financial statements should
be read in conjunction with the financial statements and notes thereto which are included in Solitario&#8217;s Annual Report on
Form 10-K for the year ended December 31, 2017. The accounting policies set forth in those annual financial statements are the
same as the accounting policies utilized in the preparation of these financial statements, except as modified for appropriate interim
financial statement presentation.</p>

<p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0; text-indent: 0.5in">&#160;</p>

<p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0; text-indent: 0.5in">&#160;</p>

<p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0"><i>Recent Developments</i></p>

<p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0">&#160;</p>

<p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0"><u>Purchase of Zazu</u></p>

<p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0; text-indent: 0.5in">&#160;</p>

<p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0; text-indent: 0.5in">On July 12, 2017, Solitario completed
the acquisition of Zazu Metals Corp. (&#8220;Zazu&#8221;) pursuant to a definitive arrangement agreement between Solitario and
Zazu whereby Solitario agreed to acquire all of the issued and outstanding common shares of Zazu (the &#34;Zazu Shares&#34;) by
way of a statutory plan of arrangement (the &#34;Arrangement&#34;) under the <i>Canada Business Corporations Act</i> (the &#8220;Acquisition&#8221;).
The Arrangement was approved by the Ontario (Canada) Superior Court of Justice on July 7, 2017. Per the Arrangement, Solitario
issued 19,788,177 shares of its common stock on July 12, 2017 in exchange for all of the issued and outstanding Zazu Shares, which
represented 0.3572 shares of Solitario common stock for each outstanding Zazu Share. Zazu had one primary asset, its interest in
the Lik project, and the Acquisition was treated as an asset purchase in accordance with ASU 2017-01 &#8220;Business Combinations.&#8221;
Solitario granted stock options to acquire an aggregate of 1,782,428 shares of Solitario common stock to Zazu option holders the
(&#8220;Replacement Options&#8221;) in connection with the Acquisition. The total purchase price of $16,110,000 was recorded during
the year ended December 31, 2017.</p>

<p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0">&#160;</p>

<p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0"><i>Financial reporting</i></p>

<p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0">&#160;</p>

<p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0; text-indent: 0.5in">The consolidated financial statements
include the accounts of Solitario and its wholly-owned subsidiaries. All significant intercompany accounts and transactions have
been eliminated in consolidation. The consolidated financial statements are prepared in accordance with accounting principles generally
accepted in the United States of America (&#34;generally accepted accounting principles&#34;) and are expressed in U.S. dollars.</p>

<p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0">&#160;</p>

<p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0"><i>Revenue recognition</i></p>

<p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0">&#160;</p>

<p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0; text-indent: 0.5in">Solitario records delay rental payments
as revenue in the period received. Any payments received for the sale of property interests are recorded as a reduction of the
related property's capitalized cost. Proceeds which exceed the capitalized cost of the property without reserves are recognized
as revenue. Payments received on the sale of properties with reserves are recognized as revenue to the extent the proceeds exceed
the proportionate basis in the assets sold. There were no delay rentals in the periods presented.</p>

<p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0">&#160;</p>

<p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0"><i>Use of estimates</i></p>

<p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0">&#160;</p>

<p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0; text-indent: 0.5in">The preparation of financial statements
in conformity with generally accepted accounting principles requires management to make estimates and assumptions that affect the
reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements
and the reported amounts of revenues and expenses during the reporting period. Actual results could differ from those estimates.
Some of the more significant estimates included in the preparation of Solitario's financial statements pertain to: (i) Solitario&#8217;s
carrying value of short-term investments; (ii) the recoverability of mineral properties related to its mineral exploration properties
and their future exploration potential; (iii) the fair value of stock option grants to employees, to officers and directors and
to others; (iv) the ability of Solitario to realize its deferred tax assets; and (v) Solitario's investment in marketable equity
securities.</p>

<p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0">&#160;</p>

<p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0; text-indent: 0.5in">In performing its activities, Solitario
has incurred certain costs for mineral properties. The recovery of these costs is ultimately dependent upon the sale of mineral
property interests or the development of economically recoverable ore reserves and the ability of Solitario to obtain the necessary
permits and financing to successfully place the properties into production, and upon future profitable operations, none of which
is assured.</p>

<p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0">&#160;</p>

<p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0"><i>Cash equivalents </i></p>

<p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0">&#160;</p>

<p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0; text-indent: 0.5in">Cash equivalents include investments
in highly liquid money-market securities with original maturities of three months or less when purchased. As of March 31, 2018,
a portion of Solitario&#8217;s cash and cash equivalents are held in brokerage accounts and foreign banks, which are not covered
under the Federal Deposit Insurance Corporation (&#8220;FDIC&#8221;) rules for the United States. At March 31, 2018, Solitario
holds short-term investments in United States Treasury securities (&#8220;USTS&#8221;) of $9,976,000.</p>

<p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0">&#160;</p>

<p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0"><i>Short-term investments</i></p>

<p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0"><i>&#160;</i></p>

<p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0; text-indent: 0.5in">As of March 31, 2018, Solitario has
$9,976,000 of its current assets in USTS with maturities of 15 days to 21 months. The USTS are recorded at their fair value, based
upon quoted market prices. As of March 31, 2018, we have $1,247,000 in separate bank certificates of deposit (&#8220;CDs&#8221;)
each with a maximum value of $250,000, and each of which are covered by FDIC insurance to the full-face value of the CDs. At March
31, 2018, the CDs have maturities of between 4 and 15 months. Solitario&#8217;s short-term investments are recorded at their fair
value, based upon quoted market prices. The short-term investments are highly liquid and may be sold in their entirety at any time
at their quoted market price and are classified as a current asset.</p>

<p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0"><i>&#160;</i></p>

<p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0"><i>Mineral properties </i></p>

<p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0; text-indent: 0.5in">&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;</p>

<p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0; text-indent: 0.5in">Solitario expenses all exploration
costs incurred on its mineral properties prior to the establishment of proven and probable reserves through the completion of a
feasibility study. Initial acquisition costs of Solitario&#8217;s mineral properties are capitalized. Solitario capitalizes all
of its development expenditures on its projects, subsequent to the completion of a feasibility study. Solitario regularly performs
evaluations of its investment in mineral properties to assess the recoverability and/or the residual value of its investments in
these assets. All long-lived assets are reviewed for impairment whenever events or circumstances change which indicate the carrying
amount of an asset may not be recoverable, utilizing established guidelines based upon undiscounted future net cash flows from
the asset or upon the determination that certain exploration properties do not have sufficient potential for economic mineralization.</p>

<p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0">&#160;</p>

<p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0"><i>Derivative instruments</i></p>

<p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0"><i>&#160;</i></p>

<p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0; text-align: left; text-indent: 0.5in">Solitario accounts
for its derivative instruments in accordance with ASC 815, &#34;Accounting for Derivative Instruments and Hedging Activities&#34;
(&#8220;ASC 815&#8221;). Solitario has entered into covered calls from time to time on its investment in Kinross Gold Corporation
(&#8220;Kinross&#8221;) marketable equity securities. In addition, during 2017 and 2016, Solitario owned warrants exercisable to
acquire shares of Vendetta Mining Corp. (&#8220;Vendetta&#8221;) common stock (the &#8220;Vendetta Warrants&#8221;). Each Vendetta
warrant allowed Solitario to purchase one share of Vendetta common stock at a price of Cdn$0.10 per share for a period of two years.
Solitario has not designated its covered calls as hedging instruments and any changes in the fair value of the covered calls and
its Vendetta Warrants are recognized in the statement of operations in the period of the change as gain or loss on derivative instruments.</p>

<p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0">&#160;</p>

<p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0"><i>Fair value</i></p>

<p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0">&#160;</p>

<p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0; text-indent: 0.5in">FASB ASC 820, &#8220;Fair Value Measurements
and Disclosures&#8221; (&#8220;ASC 820&#8221;), establishes a framework for measuring fair value and requires enhanced disclosures
about fair value measurements. ASC 820 clarifies that fair value is an exit price, representing the amount that would be received
to sell an asset or paid to transfer a liability in an orderly transaction between market participants. For certain of Solitario's
financial instruments, including cash and cash equivalents and accounts payable, the carrying amounts approximate fair value due
to their short-term maturities. Solitario's short-term investments in USTS and CDs, its marketable equity securities and any covered
call options against those marketable equity securities are carried at their estimated fair value based on quoted market prices.</p>

<p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0">&#160;</p>

<p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0"><i>Marketable equity securities</i></p>

<p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0">&#160;</p>

<p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0; text-indent: 0.5in">Solitario's investments in marketable
equity securities are classified as available-for-sale and are carried at fair value, which is based upon quoted prices of the
securities owned. Solitario records investments in marketable equity securities as available-for-sale for investments in publicly
traded marketable equity securities for which it does not exercise significant control and where Solitario has no representation
on the board of directors of those companies and exercises no control over the management of those companies. The cost of marketable
equity securities sold is determined by the specific identification method. During the first three months of 2018 Solitario adopted
ASU 2016-01, &#8220;Financial Instruments &#8211; Recognition and Measurement of Financial Assets and Financial Liabilities (Topic
825)&#8221; (&#8220;ASU 2016-01&#8221;). In accordance with ASU 2016-01, changes in fair value are recorded in the consolidated
statement of operations during the period of the change. During the first three months of 2018 Solitario recorded a cumulative-effect
adjustment to the balance sheet as of the beginning of the fiscal year of adoption of ASU 2016-01. See Note 9, &#8220;Shareholders&#8217;
Equity and Other Comprehensive Income&#8221;, below. &#9;</p>

<p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0"><i>&#160;</i></p>

<p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0"><i>Foreign exchange</i></p>

<p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0">&#160;</p>

<p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0; text-indent: 0.5in">The United States dollar is the functional
currency for all of Solitario's foreign subsidiaries. Although Solitario's South American exploration activities during 2017 and
the first quarter of 2018 have been conducted primarily in Peru, a portion of the payments under the land, leasehold and exploration
agreements of Solitario are denominated in United States dollars. Realized foreign currency gains and losses are included in the
results of operations in the period in which they occur.</p>

<p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0">&#160;</p>

<p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0"><i>Income taxes</i></p>

<p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0">&#160;</p>

<p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0; text-indent: 0.5in">Solitario accounts for income taxes
in accordance with ASC 740, &#8220;Accounting for Income Taxes&#8221; (&#8220;ASC 740&#8221;). Under ASC 740, income taxes are
provided for the tax effects of transactions reported in the financial statements and consist of taxes currently due plus deferred
taxes related to certain income and expenses recognized in different periods for financial and income tax reporting purposes. Deferred
tax assets and liabilities represent the future tax return consequences of those differences, which will either be taxable or deductible
when the assets and liabilities are recovered or settled. Deferred taxes are also recognized for operating losses and tax credits
that are available to offset future taxable income and income taxes, respectively. A valuation allowance is provided if it is more
likely than not that some portion or all of the deferred tax assets will not be realized.</p>

<p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0">&#160;</p>

<p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0"><i>Accounting for uncertainty in income taxes</i></p>

<p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0">&#160;</p>

<p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0; text-indent: 0.5in">ASC 740 clarifies the accounting
for uncertainty in income taxes recognized in a company's financial statements. ASC 740 prescribes a recognition threshold and
measurement attribute for the financial statement recognition and measurement of a tax position taken or expected to be taken in
a tax return. ASC 740 also provides guidance on derecognition, classification, interest and penalties, accounting in interim periods,
disclosure, and transition. ASC 740 provides that a company's tax position will be considered settled if the taxing authority has
completed its examination, the company does not plan to appeal, and it is remote that the taxing authority would reexamine the
tax position in the future. The provisions of ASC 740 had no effect on Solitario's financial position or results of operations.</p>

<p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0">&#160;</p>

<p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0"><i>Earnings per share</i></p>

<p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0">&#160;</p>

<p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0; text-indent: 0.5in">The calculation of basic and
diluted earnings (loss) per share is based on the weighted average number of shares of common stock outstanding during the
three months ended March 31, 2018 and 2017. Potentially dilutive shares related to outstanding common stock options of
2,082,428 Solitario common shares for the three months ended March 31, 2018 were excluded from the calculation of diluted
earnings (loss) per share because the effects were anti-dilutive. There were no similar potentially dilutive securities
outstanding during the three months ended March 31, 2017.</p>

<p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0.5in; text-indent: -0.5in">&#160;</p>

<p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0"><i>Employee stock compensation and incentive plans</i></p>

<p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0">&#160;</p>

<p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0; text-indent: 0.5in">Solitario classifies all of its stock
options as equity options in accordance with the provisions of ASC 718, &#8220;Compensation &#8211; Stock Compensation.&#8221;</p>

<p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0">&#160;</p>

<p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0"><i>Recent accounting pronouncements</i></p>

<p style="font: 12pt Times New Roman, Times, Serif; margin-right: 30.6pt; margin-left: 0">&#160;</p>

<p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0; text-indent: 0.5in">In February 2016, the FASB issued
ASU 2016-02, &#8220;Leases&#8221; (&#8220;ASU No. 2016-02&#8221;), which will require lessees to recognize a right-of-use asset
and a lease liability for all leases that are not short-term in nature. For a lessor, the accounting applied is also largely unchanged
from previous guidance. The new rules will be effective for Solitario in the first quarter of 2019. Solitario does not anticipate
early adoption. Solitario does not expect the adoption of ASU No. 2016-02 to materially change its current accounting methods and
therefore it does not expect the adoption to have a material impact on its consolidated financial position or results of operations.</p>

<p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0; text-indent: 0.5in">&#160;</p>

<p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0; text-indent: 0.5in">In January 2016 the FASB issued ASU
No 2016-01<i>.</i> ASU No. 2016-01 revises the classification and measurement of investment in certain equity investments and the
presentation of certain fair value changes for certain financial liabilities measured at fair value. ASU No. 2016-01 requires the
change in fair value of many equity investments to be recognized in net income. ASU No. 2016-01 is effective for interim and annual
periods beginning after December 15, 2017, with early adoption permitted. Solitario adopted ASU No. 2016-01 in the first quarter
of 2018. Solitario recorded a cumulative-effect adjustment for the change in accounting principle to retained earnings of $576,000
related to the adoption of ASU 2016-01. See Note 9, &#8220;Shareholders&#8217; Equity and Accumulated Other Comprehensive Income,&#8221;
below.</p>

<p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0.5in; text-indent: -0.5in"><b>&#160;</b></p>

<p style="font: 10pt Times New Roman, Times, Serif; margin: 0 30.6pt 0 0; text-indent: 0.5in">In February 2018, the FASB issued
ASU No. 2018-02, &#8220;Reclassification of Certain Tax Effects from Accumulated Other Comprehensive Income&#8221; (ASU 2018-02),
which allows for a reclassification from accumulated other comprehensive income or loss to retained earnings or accumulated deficit
for stranded tax effects resulting from the Tax Cuts and Jobs Act of 2017 (&#8220;TCJA&#8221;). ASU 2018-02 also requires certain
related disclosures. ASU 2018-02 is effective for annual periods, and interim periods within those annual periods, beginning after
December 15, 2018 and should be applied either in the period of adoption or retrospectively to each period in which the effect
of the change in the U.S. federal corporate income tax rate in the TCJA is recognized. Early adoption is permitted. Solitario is
currently evaluating the impact of ASU 2018-02&#160;but&#160;does not believe it will have a material effect on Solitario&#8217;s
financial position or results of operations.</p>



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<th class="tl" colspan="1" rowspan="2"><div style="width: 200px;"><strong>Marketable Equity Securities (Tables)<br></strong></div></th>
<th class="th" colspan="1">3 Months Ended</th>
</tr>
<tr><th class="th"><div>Mar. 31, 2018</div></th></tr>
<tr class="re">
<td class="pl " style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_XPL_NotesToFinancialStatementsAbstract', window );"><strong>Notes to Financial Statements</strong></a></td>
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<td class="pl " style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_InvestmentsInDebtAndMarketableEquitySecuritiesAndCertainTradingAssetsDisclosureTextBlock', window );">Marketable Equity Securities and Accumulated OCI</a></td>
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    <td style="width: 72%; layout-grid-mode: line; text-align: justify">(in thousands)</td>
    <td style="width: 14%; border-bottom: Black 1pt solid; padding-right: 4.5pt; layout-grid-mode: line; text-align: center">&#160;&#160;&#160;&#160;March 31, &#160;&#160;&#160;&#160;2018</td>
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    <td style="layout-grid-mode: line">&#160;&#160;Marketable equity at cost</td>
    <td style="padding-right: 4.5pt; layout-grid-mode: line; text-align: right">$1,714&#160;</td>
    <td style="padding-right: 9pt; layout-grid-mode: line; text-align: right">$1,714&#160;</td></tr>
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    <td style="layout-grid-mode: line">&#160;&#160;Unrealized gain on marketable equity securities</td>
    <td style="border-bottom: Black 1pt solid; padding-right: 4.5pt; layout-grid-mode: line; text-align: right">488&#160;</td>
    <td style="border-bottom: Black 1pt solid; padding-right: 9pt; layout-grid-mode: line; text-align: right">&#160;&#160;&#160;929&#160;</td></tr>
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    <td style="border-bottom: Black 1pt solid; padding-right: 4.5pt; layout-grid-mode: line; text-align: right">2,202&#160;</td>
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March 31,</td></tr>
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    <td style="width: 72%; padding-right: 5.4pt; padding-left: 5.4pt; layout-grid-mode: line">&#160;</td>
    <td style="width: 14%; border-bottom: Black 1pt solid; padding-right: 5.4pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: center">2018</td>
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    <td style="padding-right: -0.9pt; padding-left: 0.1in; layout-grid-mode: line; text-align: right">$&#160;&#160;&#160;-&#160;&#160;&#160;</td>
    <td style="padding-right: 3.75pt; padding-left: 0.1in; layout-grid-mode: line; text-align: right">$&#160;&#160;&#160;38&#160;</td></tr>
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    <td style="padding-right: 3.75pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: right">477&#160;</td></tr>
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<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 942<br> -SubTopic 320<br> -URI http://asc.fasb.org/subtopic&amp;trid=2209399<br><br>Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 946<br> -SubTopic 320<br> -URI http://asc.fasb.org/subtopic&amp;trid=2324412<br><br>Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 320<br> -URI http://asc.fasb.org/topic&amp;trid=2196928<br><br>Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 940<br> -SubTopic 320<br> -URI http://asc.fasb.org/subtopic&amp;trid=2176304<br></p></div>
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<th class="tl" colspan="1" rowspan="2"><div style="width: 200px;"><strong>Other Assets (Tables)<br></strong></div></th>
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<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div><p>Tabular disclosure of the carrying amounts of other assets. This disclosure includes other current assets and other noncurrent assets.</p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;"><p>No definition available.</p></div>
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<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
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<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div><p>Tabular disclosure of the location and amount of derivative instruments and nonderivative instruments designated as hedging instruments reported before netting adjustments, and the amount of gain (loss) on derivative instruments and nonderivative instruments designated and qualified as hedging instruments.</p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://www.xbrl.org/2003/role/disclosureRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 815<br> -SubTopic 10<br> -Section 50<br> -Paragraph 4E<br> -URI http://asc.fasb.org/extlink&amp;oid=109980867&amp;loc=SL5624181-113959<br><br>Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 815<br> -SubTopic 10<br> -Section 50<br> -Paragraph 4A<br> -Subparagraph (b)<br> -URI http://asc.fasb.org/extlink&amp;oid=109980867&amp;loc=SL5618551-113959<br><br>Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 815<br> -SubTopic 10<br> -Section 50<br> -Paragraph 4C<br> -URI http://asc.fasb.org/extlink&amp;oid=109980867&amp;loc=SL5624171-113959<br></p></div>
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<span style="display: none;">v3.8.0.1</span><table class="report" border="0" cellspacing="2" id="idp6796404320">
<tr>
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<p style="font: 10pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0">&#160;</p>

<p style="font: 10pt Times New Roman, Times, Serif; margin: 0 0.55in 0 0; text-indent: 0.5in">The following is a listing of Solitario&#8217;s
financial assets and liabilities required to be measured at fair value on a recurring basis and where they are classified within
the hierarchy as of December 31, 2017:</p>

<p style="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify">&#160;</p>

<table cellspacing="0" cellpadding="0" style="font: 10pt Times New Roman, Times, Serif; width: 100%; border-collapse: collapse">
<tr style="vertical-align: bottom">
    <td style="width: 48%; layout-grid-mode: line; text-align: justify">(in thousands)</td>
    <td style="width: 13%; border-bottom: Black 1pt solid; padding-right: 6pt; layout-grid-mode: line; text-align: center">Level 1</td>
    <td style="width: 14%; border-bottom: Black 1pt solid; padding-right: 8.25pt; layout-grid-mode: line; text-align: center">Level 2</td>
    <td style="width: 12%; border-bottom: Black 1pt solid; padding-right: 3pt; layout-grid-mode: line; text-align: center">Level 3</td>
    <td style="width: 13%; border-bottom: Black 1pt solid; padding-right: 5.25pt; layout-grid-mode: line; text-align: center">Total</td></tr>
<tr style="vertical-align: bottom">
    <td style="layout-grid-mode: line"><b>Assets</b></td>
    <td style="padding-right: 6pt; layout-grid-mode: line; text-align: right">&#160;</td>
    <td style="padding-right: 8.25pt; layout-grid-mode: line; text-align: right">&#160;</td>
    <td style="padding-right: 3pt; layout-grid-mode: line; text-align: right">&#160;</td>
    <td style="padding-right: 5.25pt; layout-grid-mode: line; text-align: right">&#160;</td></tr>
<tr style="vertical-align: bottom">
    <td style="layout-grid-mode: line">&#160;&#160;Marketable equity securities</td>
    <td style="padding-right: 6pt; layout-grid-mode: line; text-align: right">$2,643&#160;</td>
    <td style="padding-right: 8.25pt; layout-grid-mode: line; text-align: right">$&#160;&#160;&#160;-&#160;&#160;&#160;</td>
    <td style="padding-right: 3pt; layout-grid-mode: line; text-align: right">$&#160;&#160;-&#160;&#160;&#160;</td>
    <td style="padding-right: 5.25pt; layout-grid-mode: line; text-align: right">$2,643&#160;</td></tr>
<tr style="vertical-align: bottom">
    <td style="layout-grid-mode: line">&#160;&#160;United States Treasury securities</td>
    <td style="padding-right: 6pt; layout-grid-mode: line; text-align: right">10,395&#160;</td>
    <td style="padding-right: 3pt; layout-grid-mode: line; text-align: right">-&#160;&#160;&#160;&#160;&#160;</td>
    <td style="padding-right: 3pt; layout-grid-mode: line; text-align: right">-&#160;&#160;&#160;</td>
    <td style="padding-right: 5.25pt; layout-grid-mode: line; text-align: right">10,395&#160;</td></tr>
<tr style="vertical-align: bottom">
    <td style="layout-grid-mode: line">&#160;&#160;Bank Certificates of Deposit</td>
    <td style="padding-right: 6pt; layout-grid-mode: line; text-align: right">1,247&#160;</td>
    <td style="padding-right: 3pt; layout-grid-mode: line; text-align: right">-&#160;&#160;&#160;&#160;&#160;</td>
    <td style="padding-right: 3pt; layout-grid-mode: line; text-align: right">-&#160;&#160;&#160;</td>
    <td style="padding-right: 5.25pt; layout-grid-mode: line; text-align: right">1,247&#160;</td></tr>
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</td>
</tr>
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<div style="display: none;">
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<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div><p>Tabular disclosure of input and valuation technique used to measure fair value and change in valuation approach and technique for each separate class of asset and liability measured on recurring and nonrecurring basis.</p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 820<br> -SubTopic 10<br> -Section 50<br> -Paragraph 2<br> -Subparagraph (bbb)<br> -URI http://asc.fasb.org/extlink&amp;oid=99377789&amp;loc=d3e19207-110258<br></p></div>
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<span style="display: none;">v3.8.0.1</span><table class="report" border="0" cellspacing="2" id="idp6608858400">
<tr>
<th class="tl" colspan="1" rowspan="2"><div style="width: 200px;"><strong>Shareholders' Equity and Other Comprehensive Income (Tables)<br></strong></div></th>
<th class="th" colspan="1">3 Months Ended</th>
</tr>
<tr><th class="th"><div>Mar. 31, 2018</div></th></tr>
<tr class="re">
<td class="pl " style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_XPL_NotesToFinancialStatementsAbstract', window );"><strong>Notes to Financial Statements</strong></a></td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl custom" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_XPL_ScheduleOfStockholdersEquityTsbleTextBlockTableTextBlock', window );">Stockholders' Equity and Accumulated Other Comprehensive Income</a></td>
<td class="text"><table cellspacing="0" cellpadding="0" style="font: 10pt Times New Roman, Times, Serif; width: 100%; border-collapse: collapse">
<tr>
    <td style="vertical-align: top; width: 32%; padding-right: 5.4pt; padding-left: 5.4pt; font-family: Courier New, Courier, Monospace"><font style="font-family: Times New Roman, Times, Serif">(in thousands, except</font></td>
    <td style="vertical-align: bottom; width: 10%; padding-right: -5.4pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: center">&#160;</td>
    <td style="vertical-align: bottom; width: 9%; padding-right: 5.4pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: center">&#160;</td>
    <td style="vertical-align: bottom; width: 11%; padding-right: 5.4pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: center">&#160;</td>
    <td style="vertical-align: bottom; width: 12%; padding-right: 5.4pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: center">&#160;</td>
    <td style="vertical-align: bottom; width: 14%; padding-right: -5.4pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: center">Accumulated</td>
    <td style="vertical-align: bottom; width: 12%; padding-right: -5.4pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: center">&#160;</td></tr>
<tr>
    <td style="vertical-align: top; padding-right: 5.4pt; padding-left: 5.4pt; layout-grid-mode: line">Share amounts)</td>
    <td style="vertical-align: bottom; padding-right: -5.4pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: center">Common</td>
    <td style="vertical-align: bottom; padding-right: -5.4pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: center">Common</td>
    <td style="vertical-align: bottom; padding-right: -5.4pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: center; text-indent: -5.4pt">Additional</td>
    <td style="vertical-align: bottom; padding-right: -5.4pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: center">&#160;</td>
    <td style="vertical-align: bottom; padding-right: -5.4pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: center">Other</td>
    <td style="vertical-align: bottom; padding-right: -5.4pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: center">Total</td></tr>
<tr>
    <td style="vertical-align: top; padding-right: 5.4pt; padding-left: 5.4pt; layout-grid-mode: line">&#160;</td>
    <td style="vertical-align: bottom; padding-right: -5.4pt; padding-left: 5.4pt; text-align: center; font-family: CG Times (W1)"><font style="font-family: Times New Roman, Times, Serif">Stock</font></td>
    <td style="vertical-align: bottom; padding-right: -5.4pt; padding-left: 5.4pt; text-align: center; font-family: CG Times (W1)"><font style="font-family: Times New Roman, Times, Serif">Stock</font></td>
    <td style="vertical-align: bottom; padding-right: -5.4pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: center; text-indent: -5.4pt">Paid-in</td>
    <td style="vertical-align: bottom; padding-right: -5.4pt; padding-left: 5.4pt; text-align: center; font-family: CG Times (W1)"><font style="font-family: Times New Roman, Times, Serif">Accumulated</font></td>
    <td style="vertical-align: bottom; padding-right: -5.4pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: center">Comprehensive</td>
    <td style="vertical-align: bottom; padding-right: -5.4pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: center">Shareholders&#8217;</td></tr>
<tr>
    <td style="vertical-align: top; padding-right: 5.4pt; padding-left: 5.4pt; layout-grid-mode: line">&#160;</td>
    <td style="vertical-align: bottom; border-bottom: Black 1pt solid; padding-right: -5.4pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: center">Shares</td>
    <td style="vertical-align: bottom; border-bottom: Black 1pt solid; padding-right: -5.4pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: center">Amount</td>
    <td style="vertical-align: bottom; border-bottom: Black 1pt solid; padding-right: -5.4pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: center; text-indent: -5.4pt">Capital</td>
    <td style="vertical-align: bottom; border-bottom: Black 1pt solid; padding-right: -5.4pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: center">Deficit</td>
    <td style="vertical-align: bottom; border-bottom: Black 1pt solid; padding-right: -5.4pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: center">Income</td>
    <td style="vertical-align: bottom; border-bottom: Black 1pt solid; padding-right: -5.4pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: center">Equity</td></tr>
<tr style="vertical-align: bottom">
    <td style="padding-right: 5.4pt; padding-left: 5.4pt; layout-grid-mode: line"><b>Balance at December 31, 2017</b></td>
    <td style="padding-right: 5.4pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: right"><b>58,434,566</b></td>
    <td style="padding-right: -0.75pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: right"><b>584&#160;</b></td>
    <td style="padding-right: 5.4pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: right"><b>$69,312&#160;</b></td>
    <td style="padding-right: 3.75pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: right"><b>$(40,343)</b></td>
    <td style="padding-right: 3.75pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: right"><b>$&#160;&#160;&#160;576&#160;</b></td>
    <td style="padding-right: 2.15pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: right"><b>$30,129&#160;</b></td></tr>
<tr>
    <td style="vertical-align: top; padding-right: 5.4pt; padding-left: 5.4pt">
        <p style="font: 10pt Times New Roman, Times, Serif; margin: 0">Cumulative-effect adjustment</p>
        <p style="font: 10pt Times New Roman, Times, Serif; margin: 0">change in accounting principle</p></td>
    <td style="vertical-align: bottom; border-bottom: Black 1pt solid; padding-right: 5.4pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: right"><b>- &#160;&#160;</b></td>
    <td style="vertical-align: bottom; border-bottom: Black 1pt solid; padding-right: -0.75pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: right"><b>- &#160;&#160;</b></td>
    <td style="vertical-align: bottom; border-bottom: Black 1pt solid; padding-right: 5.4pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: right"><b>- &#160;&#160;</b></td>
    <td style="vertical-align: bottom; border-bottom: Black 1pt solid; padding-right: 3.75pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: right">576&#160;</td>
    <td style="vertical-align: bottom; border-bottom: Black 1pt solid; padding-right: 3.75pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: right">(576)</td>
    <td style="vertical-align: bottom; border-bottom: Black 1pt solid; padding-right: 3.75pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: right"><b>-&#160;&#160;</b></td></tr>
<tr>
    <td style="vertical-align: top; padding-right: 5.4pt; padding-left: 5.4pt; layout-grid-mode: line"><b>Adjusted balance January 1, 2018</b></td>
    <td style="vertical-align: bottom; padding-right: 5.4pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: right"><b>58,434,566</b></td>
    <td style="vertical-align: bottom; padding-right: -0.75pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: right"><b>584</b></td>
    <td style="vertical-align: bottom; padding-right: 5.4pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: right"><b>69,312&#160;</b></td>
    <td style="vertical-align: bottom; padding-right: 3.75pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: right"><b>(39,767)</b></td>
    <td style="vertical-align: bottom; padding-right: 3.75pt; padding-left: 26.2pt; layout-grid-mode: line; text-align: right"><b>- &#160;&#160;</b></td>
    <td style="vertical-align: bottom; padding-right: 2.15pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: right"><b>30,129&#160;</b></td></tr>
<tr>
    <td style="vertical-align: top; padding-right: 5.4pt; padding-left: 5.4pt; layout-grid-mode: line">Stock option expense</td>
    <td style="vertical-align: bottom; padding-right: 5.4pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: right"><b>- &#160;&#160;</b></td>
    <td style="vertical-align: bottom; padding-right: -0.75pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: right"><b>- &#160;&#160;</b></td>
    <td style="vertical-align: bottom; padding-right: 5.4pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: right">10<b>&#160;</b></td>
    <td style="vertical-align: bottom; padding-right: 3.75pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: right"><b>- &#160;&#160;</b></td>
    <td style="vertical-align: bottom; padding-right: 3.75pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: right"><b>- &#160;&#160;</b></td>
    <td style="vertical-align: bottom; padding-right: 2.15pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: right">10&#160;</td></tr>
<tr>
    <td style="vertical-align: top; padding-right: 5.4pt; padding-left: 5.4pt; layout-grid-mode: line">Purchase of shares for cancellation</td>
    <td style="vertical-align: bottom; padding-right: 5.4pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: right">(52,614)</td>
    <td style="vertical-align: bottom; padding-right: -0.75pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: right">-&#160;&#160;&#160;</td>
    <td style="vertical-align: bottom; padding-right: 5.4pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: right">(26)</td>
    <td style="vertical-align: bottom; padding-right: 3.75pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: right">-&#160;&#160;&#160;</td>
    <td style="vertical-align: bottom; padding-right: 3.75pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: right">-&#160;&#160;&#160;</td>
    <td style="vertical-align: bottom; padding-right: 2.15pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: right">(26)</td></tr>
<tr>
    <td style="vertical-align: top; padding-right: 5.4pt; padding-left: 5.4pt; layout-grid-mode: line">Net loss</td>
    <td style="vertical-align: bottom; padding-right: 5.4pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: right">-&#160;&#160;&#160;</td>
    <td style="vertical-align: bottom; padding-right: -0.75pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: right">-&#160;&#160;&#160;</td>
    <td style="vertical-align: bottom; padding-right: 5.4pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: right">-&#160;&#160;&#160;</td>
    <td style="vertical-align: bottom; padding-right: 3.75pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: right">(1,004)</td>
    <td style="vertical-align: bottom; padding-right: 3.75pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: right">-&#160;&#160;&#160;</td>
    <td style="vertical-align: bottom; padding-right: 2.15pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: right">(1,004)</td></tr>
<tr>
    <td style="vertical-align: top; padding-right: 5.4pt; padding-left: 5.4pt; layout-grid-mode: line"><b>Balance at March 31, 2017 </b></td>
    <td style="vertical-align: bottom; border-top: Black 1pt solid; border-bottom: Black 1pt solid; padding-right: 5.4pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: right"><b>58,381,952</b></td>
    <td style="vertical-align: bottom; border-top: Black 1pt solid; border-bottom: Black 1pt solid; padding-right: -0.75pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: right"><b>$584</b></td>
    <td style="vertical-align: bottom; border-top: Black 1pt solid; border-bottom: Black 1pt solid; padding-right: 5.4pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: right"><b>$69,296&#160;</b></td>
    <td style="vertical-align: bottom; border-top: Black 1pt solid; border-bottom: Black 1pt solid; padding-right: 3.75pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: right"><b>$(40,771)</b></td>
    <td style="vertical-align: bottom; border-top: Black 1pt solid; border-bottom: Black 1pt solid; padding-right: 3.75pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: right"><b>$&#160;&#160;&#160;&#160;-&#160;&#160;&#160;&#160;&#160;</b></td>
    <td style="vertical-align: bottom; border-top: Black 1pt solid; border-bottom: Black 1pt solid; padding-right: 2.15pt; padding-left: 5.4pt; layout-grid-mode: line; text-align: right"><b>$29,109&#160;</b></td></tr>
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</td>
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<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">XPL_ScheduleOfStockholdersEquityTsbleTextBlockTableTextBlock</td>
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<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
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<DOCUMENT>
<TYPE>XML
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<DESCRIPTION>IDEA: XBRL DOCUMENT
<TEXT>
<html>
<head>
<title></title>
<link rel="stylesheet" type="text/css" href="report.css">
<script type="text/javascript" src="Show.js">/* Do Not Remove This Comment */</script><script type="text/javascript">
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<body>
<span style="display: none;">v3.8.0.1</span><table class="report" border="0" cellspacing="2" id="idp6805413376">
<tr>
<th class="tl" colspan="1" rowspan="2"><div style="width: 200px;"><strong>Business and Significant Accounting Policies (Details Narrative) - USD ($)<br> $ in Thousands</strong></div></th>
<th class="th" colspan="1">3 Months Ended</th>
<th class="th" colspan="1">12 Months Ended</th>
<th class="th" colspan="1"></th>
</tr>
<tr>
<th class="th"><div>Mar. 31, 2018</div></th>
<th class="th"><div>Dec. 31, 2017</div></th>
<th class="th"><div>Jul. 12, 2017</div></th>
</tr>
<tr class="re">
<td class="pl " style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_AccountingPoliciesAbstract', window );"><strong>Accounting Policies [Abstract]</strong></a></td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl custom" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_XPL_CommonStockIssuedForPurchaseOfAssets', window );">Solitario common shares issued at a rate of 0.3572 for 1 share Zazu for all issued and outstanding Zazu shares</a></td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="nump">19,788,177<span></span>
</td>
</tr>
<tr class="re">
<td class="pl custom" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_XPL_ReplacementStockOptionsGranted', window );">Solitario stock options granted to Zazu option holders</a></td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="nump">1,782,428<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl " style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_AcquisitionCosts', window );">Total purchase price of Zazu</a></td>
<td class="text">&#160;<span></span>
</td>
<td class="nump">$ 16,110<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="re">
<td class="pl " style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_USGovernmentSecuritiesAtCarryingValue', window );">Current assets in United States Treasury securities</a></td>
<td class="nump">$ 9,976<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl " style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_CertificatesOfDepositAtCarryingValue', window );">Bank certificates of deposit each with $250,000 maximum</a></td>
<td class="nump">$ 1,247<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="re">
<td class="pl " style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount', window );">Potentially dilutive shares related to outstanding common stock options</a></td>
<td class="nump">2,082,428<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl " style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_CumulativeEffectOnRetainedEarningsTax1', window );">Cumulative-effect adjustment for change in accounting principle</a></td>
<td class="nump">$ 576<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
</table>
<div style="display: none;">
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_XPL_CommonStockIssuedForPurchaseOfAssets">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- References</a><div><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">XPL_CommonStockIssuedForPurchaseOfAssets</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>XPL_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:sharesItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>instant</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_XPL_ReplacementStockOptionsGranted">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- References</a><div><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">XPL_ReplacementStockOptionsGranted</td>
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<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>XPL_</td>
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<td><strong> Data Type:</strong></td>
<td>xbrli:sharesItemType</td>
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<td><strong> Balance Type:</strong></td>
<td>na</td>
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<tr>
<td><strong> Period Type:</strong></td>
<td>instant</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_AccountingPoliciesAbstract">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- References</a><div><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_AccountingPoliciesAbstract</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>us-gaap_</td>
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<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:stringItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_AcquisitionCosts">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div><p>The capitalized costs incurred during the period (excluded from amortization) to purchase, lease or otherwise acquire an unproved property, including costs of lease bonuses and options to purchase or lease properties, the portion of costs applicable to minerals when land including mineral rights is purchased in fee, brokers' fees, recording fees, legal costs, and other costs incurred in acquiring properties.</p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 932<br> -SubTopic 10<br> -Section S99<br> -Paragraph 1<br> -Subparagraph (SX 210.4-10(c)(7)(ii))<br> -URI http://asc.fasb.org/extlink&amp;oid=82851474&amp;loc=d3e511914-122862<br><br>Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 932<br> -SubTopic 10<br> -Section S99<br> -Paragraph 1<br> -Subparagraph (SX 210.4-10(c)(3)(ii)(A))<br> -URI http://asc.fasb.org/extlink&amp;oid=82851474&amp;loc=d3e511914-122862<br></p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_AcquisitionCosts</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>us-gaap_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:monetaryItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>debit</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div><p>Securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) or earnings per unit (EPU) in the future that were not included in the computation of diluted EPS or EPU because to do so would increase EPS or EPU amounts or decrease loss per share or unit amounts for the period presented.</p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 260<br> -SubTopic 10<br> -Section 50<br> -Paragraph 1<br> -Subparagraph (c)<br> -URI http://asc.fasb.org/extlink&amp;oid=6371337&amp;loc=d3e3550-109257<br></p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>us-gaap_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:sharesItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
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<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_CertificatesOfDepositAtCarryingValue">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div><p>A savings certificate entitling the Entity (that is, bearer) to receive interest at an established maturity date, based upon a fixed interest rate.  A certificate of deposit may be issued in any denomination. Certificates of deposit are generally issued by commercial banks and, therefore, insured by the FDIC (up to the prescribed limit).  Certificates of deposit generally restrict holders from withdrawing funds on demand without the incurrence of penalties.  Generally, only certificates of deposit with original maturities of three months or less qualify as cash equivalents. Original maturity means original maturity to the entity holding the investment. As a related example, both a three-month US Treasury bill and a three-year Treasury note purchased three months from maturity qualify as cash equivalents. However, a Treasury note purchased three-years ago does not become a cash equivalent when its remaining maturity is three months.</p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 210<br> -SubTopic 10<br> -Section S99<br> -Paragraph 1<br> -Subparagraph (SX 210.5-02.1)<br> -URI http://asc.fasb.org/extlink&amp;oid=6877327&amp;loc=d3e13212-122682<br></p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_CertificatesOfDepositAtCarryingValue</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>us-gaap_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:monetaryItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>debit</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>instant</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_CumulativeEffectOnRetainedEarningsTax1">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div><p>Amount of the related income tax effect of a cumulative effect on retained earnings.</p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 250<br> -SubTopic 10<br> -Section 50<br> -Paragraph 9<br> -URI http://asc.fasb.org/extlink&amp;oid=109234566&amp;loc=d3e22663-107794<br></p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_CumulativeEffectOnRetainedEarningsTax1</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>us-gaap_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:monetaryItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>debit</td>
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<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_USGovernmentSecuritiesAtCarryingValue">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div><p>Debt (bills, notes or bonds) that are issued by the government of the United States which are short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. Generally, only investments with original maturities of three months or less qualify under that definition. Original maturity means original maturity to the entity holding the investment. For example, both a three-month US Treasury bill and a three-year Treasury note purchased three months from maturity qualify as cash equivalents. However, a Treasury note purchased three-years ago does not become a cash equivalent when its remaining maturity is three months.</p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;"><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_USGovernmentSecuritiesAtCarryingValue</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>us-gaap_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:monetaryItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>debit</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>instant</td>
</tr>
</table></div>
</div></td></tr>
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</div>
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<DOCUMENT>
<TYPE>XML
<SEQUENCE>33
<FILENAME>R23.htm
<DESCRIPTION>IDEA: XBRL DOCUMENT
<TEXT>
<html>
<head>
<title></title>
<link rel="stylesheet" type="text/css" href="report.css">
<script type="text/javascript" src="Show.js">/* Do Not Remove This Comment */</script><script type="text/javascript">
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<span style="display: none;">v3.8.0.1</span><table class="report" border="0" cellspacing="2" id="idp6805484624">
<tr>
<th class="tl" colspan="1" rowspan="2"><div style="width: 200px;"><strong>Mineral Property - Capitalized Investment in Mineral Properties (Details) - USD ($)<br> $ in Thousands</strong></div></th>
<th class="th" colspan="1">3 Months Ended</th>
<th class="th" colspan="1">12 Months Ended</th>
</tr>
<tr>
<th class="th"><div>Mar. 31, 2018</div></th>
<th class="th"><div>Dec. 31, 2017</div></th>
</tr>
<tr class="rh">
<td class="pl " style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_CapitalizedCostsOfUnprovedPropertiesExcludedFromAmortizationByPropertyOrProjectAxis=XPL_LikProjectAlaskaMember', window );">Lik Project (Alaska)</a></td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl custom" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_XPL_ExplorationExpenseMineralProperties', window );">Exploration</a></td>
<td class="nump">$ 15,611<span></span>
</td>
<td class="nump">$ 15,611<span></span>
</td>
</tr>
<tr class="rh">
<td class="pl " style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_CapitalizedCostsOfUnprovedPropertiesExcludedFromAmortizationByPropertyOrProjectAxis=XPL_LaPromesaPeruMember', window );">La Promesa (Peru)</a></td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl custom" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_XPL_ExplorationExpenseMineralProperties', window );">Exploration</a></td>
<td class="nump">6<span></span>
</td>
<td class="nump">6<span></span>
</td>
</tr>
<tr class="rh">
<td class="pl " style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_CapitalizedCostsOfUnprovedPropertiesExcludedFromAmortizationByPropertyOrProjectAxis=XPL_MontanaRoyaltyPropertyMember', window );">Montana Royalty Property</a></td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl custom" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_XPL_ExplorationExpenseMineralProperties', window );">Exploration</a></td>
<td class="nump">40<span></span>
</td>
<td class="nump">40<span></span>
</td>
</tr>
<tr class="rh">
<td class="pl " style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_CapitalizedCostsOfUnprovedPropertiesExcludedFromAmortizationByPropertyOrProjectAxis=XPL_TotalExplorationMineralPropertyMember', window );">Total Exploration Mineral Property</a></td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl custom" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_XPL_ExplorationExpenseMineralProperties', window );">Exploration</a></td>
<td class="nump">$ 15,657<span></span>
</td>
<td class="nump">$ 15,657<span></span>
</td>
</tr>
</table>
<div style="display: none;">
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_XPL_ExplorationExpenseMineralProperties">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- References</a><div><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">XPL_ExplorationExpenseMineralProperties</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>XPL_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:monetaryItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>debit</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_CapitalizedCostsOfUnprovedPropertiesExcludedFromAmortizationByPropertyOrProjectAxis=XPL_LikProjectAlaskaMember">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Details</a><div><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_CapitalizedCostsOfUnprovedPropertiesExcludedFromAmortizationByPropertyOrProjectAxis=XPL_LikProjectAlaskaMember</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td></td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td></td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td></td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_CapitalizedCostsOfUnprovedPropertiesExcludedFromAmortizationByPropertyOrProjectAxis=XPL_LaPromesaPeruMember">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Details</a><div><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_CapitalizedCostsOfUnprovedPropertiesExcludedFromAmortizationByPropertyOrProjectAxis=XPL_LaPromesaPeruMember</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td></td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td></td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td></td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_CapitalizedCostsOfUnprovedPropertiesExcludedFromAmortizationByPropertyOrProjectAxis=XPL_MontanaRoyaltyPropertyMember">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Details</a><div><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_CapitalizedCostsOfUnprovedPropertiesExcludedFromAmortizationByPropertyOrProjectAxis=XPL_MontanaRoyaltyPropertyMember</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td></td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td></td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td></td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_CapitalizedCostsOfUnprovedPropertiesExcludedFromAmortizationByPropertyOrProjectAxis=XPL_TotalExplorationMineralPropertyMember">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Details</a><div><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_CapitalizedCostsOfUnprovedPropertiesExcludedFromAmortizationByPropertyOrProjectAxis=XPL_TotalExplorationMineralPropertyMember</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td></td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td></td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td></td>
</tr>
</table></div>
</div></td></tr>
</table>
</div>
</body>
</html>
</TEXT>
</DOCUMENT>
<DOCUMENT>
<TYPE>XML
<SEQUENCE>34
<FILENAME>R24.htm
<DESCRIPTION>IDEA: XBRL DOCUMENT
<TEXT>
<html>
<head>
<title></title>
<link rel="stylesheet" type="text/css" href="report.css">
<script type="text/javascript" src="Show.js">/* Do Not Remove This Comment */</script><script type="text/javascript">
							function toggleNextSibling (e) {
							if (e.nextSibling.style.display=='none') {
							e.nextSibling.style.display='block';
							} else { e.nextSibling.style.display='none'; }
							}</script>
</head>
<body>
<span style="display: none;">v3.8.0.1</span><table class="report" border="0" cellspacing="2" id="idp6787497776">
<tr>
<th class="tl" colspan="1" rowspan="2"><div style="width: 200px;"><strong>Mineral Property - Exploration Expense (Details) - USD ($)<br> $ in Thousands</strong></div></th>
<th class="th" colspan="2">3 Months Ended</th>
</tr>
<tr>
<th class="th"><div>Mar. 31, 2018</div></th>
<th class="th"><div>Mar. 31, 2017</div></th>
</tr>
<tr class="re">
<td class="pl " style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_srt_ExtractiveIndustriesAbstract', window );"><strong>Extractive Industries [Abstract]</strong></a></td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl custom" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_XPL_ExplorationGeologicAndFieldExpense', window );">Geologic and field expenses</a></td>
<td class="nump">$ 24<span></span>
</td>
<td class="nump">$ 22<span></span>
</td>
</tr>
<tr class="re">
<td class="pl " style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_OtherGeneralAndAdministrativeExpense', window );">Administrative</a></td>
<td class="nump">156<span></span>
</td>
<td class="nump">129<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl " style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_ExplorationExpenseMining', window );">Total exploration costs</a></td>
<td class="nump">$ 180<span></span>
</td>
<td class="nump">$ 151<span></span>
</td>
</tr>
</table>
<div style="display: none;">
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_XPL_ExplorationGeologicAndFieldExpense">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- References</a><div><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">XPL_ExplorationGeologicAndFieldExpense</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>XPL_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:monetaryItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>debit</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_srt_ExtractiveIndustriesAbstract">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- References</a><div><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">srt_ExtractiveIndustriesAbstract</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>srt_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:stringItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_ExplorationExpenseMining">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div><p>Exploration expenses (including prospecting) related to the mining industry would be included in operating expenses. Exploration costs include costs incurred in identifying areas that may warrant examination and in examining specific areas that are considered to have prospects of mineral reserves.</p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;"><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_ExplorationExpenseMining</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>us-gaap_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:monetaryItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>debit</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_OtherGeneralAndAdministrativeExpense">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div><p>Amount of general and administrative expense classified as other.</p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 220<br> -SubTopic 10<br> -Section S99<br> -Paragraph 2<br> -Subparagraph (SX 210.5-03.4)<br> -URI http://asc.fasb.org/extlink&amp;oid=115205541&amp;loc=SL114868664-224227<br></p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_OtherGeneralAndAdministrativeExpense</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>us-gaap_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:monetaryItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>debit</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
</div>
</body>
</html>
</TEXT>
</DOCUMENT>
<DOCUMENT>
<TYPE>XML
<SEQUENCE>35
<FILENAME>R25.htm
<DESCRIPTION>IDEA: XBRL DOCUMENT
<TEXT>
<html>
<head>
<title></title>
<link rel="stylesheet" type="text/css" href="report.css">
<script type="text/javascript" src="Show.js">/* Do Not Remove This Comment */</script><script type="text/javascript">
							function toggleNextSibling (e) {
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							e.nextSibling.style.display='block';
							} else { e.nextSibling.style.display='none'; }
							}</script>
</head>
<body>
<span style="display: none;">v3.8.0.1</span><table class="report" border="0" cellspacing="2" id="idp6796345248">
<tr>
<th class="tl" colspan="1" rowspan="1"><div style="width: 200px;"><strong>Mineral Property (Details Narrative) - USD ($)<br> $ in Thousands</strong></div></th>
<th class="th"><div>Mar. 31, 2018</div></th>
<th class="th"><div>Dec. 31, 2017</div></th>
</tr>
<tr class="re">
<td class="pl " style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_srt_ExtractiveIndustriesAbstract', window );"><strong>Extractive Industries [Abstract]</strong></a></td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl " style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_MineReclamationAndClosingLiabilityNoncurrent', window );">Asset retirement obliigation - Lik</a></td>
<td class="nump">$ 125<span></span>
</td>
<td class="nump">$ 125<span></span>
</td>
</tr>
</table>
<div style="display: none;">
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_srt_ExtractiveIndustriesAbstract">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- References</a><div><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">srt_ExtractiveIndustriesAbstract</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>srt_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:stringItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_MineReclamationAndClosingLiabilityNoncurrent">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div><p>Amount of a reclamation and mine closing liability that is associated with a legal obligation for the closure and reclamation of a mine including the removal of buildings, equipment, machinery and other physical remnants of mining, closure of tailings impoundments, leach pads and other mine features, and contouring, covering and revegetation of waste rock piles and other disturbed areas.</p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 450<br> -SubTopic 20<br> -Section S99<br> -Paragraph 1<br> -Subparagraph (SAB TOPIC 5.Y.Q2)<br> -URI http://asc.fasb.org/extlink&amp;oid=27011672&amp;loc=d3e149879-122751<br></p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_MineReclamationAndClosingLiabilityNoncurrent</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>us-gaap_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:monetaryItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>credit</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>instant</td>
</tr>
</table></div>
</div></td></tr>
</table>
</div>
</body>
</html>
</TEXT>
</DOCUMENT>
<DOCUMENT>
<TYPE>XML
<SEQUENCE>36
<FILENAME>R26.htm
<DESCRIPTION>IDEA: XBRL DOCUMENT
<TEXT>
<html>
<head>
<title></title>
<link rel="stylesheet" type="text/css" href="report.css">
<script type="text/javascript" src="Show.js">/* Do Not Remove This Comment */</script><script type="text/javascript">
							function toggleNextSibling (e) {
							if (e.nextSibling.style.display=='none') {
							e.nextSibling.style.display='block';
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							}</script>
</head>
<body>
<span style="display: none;">v3.8.0.1</span><table class="report" border="0" cellspacing="2" id="idp6629528208">
<tr>
<th class="tl" colspan="1" rowspan="1"><div style="width: 200px;"><strong>Marketable Equity Securities - Marketable Equity Securities and Accumulated OCI (Details) - USD ($)<br> $ in Thousands</strong></div></th>
<th class="th"><div>Mar. 31, 2018</div></th>
<th class="th"><div>Dec. 31, 2017</div></th>
</tr>
<tr class="re">
<td class="pl " style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_XPL_NotesToFinancialStatementsAbstract', window );"><strong>Notes to Financial Statements</strong></a></td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl " style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_TradingSecuritiesCost', window );">Marketable equity at cost</a></td>
<td class="nump">$ 1,714<span></span>
</td>
<td class="nump">$ 1,714<span></span>
</td>
</tr>
<tr class="re">
<td class="pl " style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_AvailableForSaleSecuritiesAccumulatedGrossUnrealizedGainLossBeforeTax', window );">Unrealized gain on marketable equity securities</a></td>
<td class="nump">488<span></span>
</td>
<td class="nump">929<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl " style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_InvestmentsFairValueDisclosure', window );">Marketable equity securities at fair value</a></td>
<td class="nump">$ 2,202<span></span>
</td>
<td class="nump">$ 2,643<span></span>
</td>
</tr>
</table>
<div style="display: none;">
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_XPL_NotesToFinancialStatementsAbstract">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- References</a><div><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">XPL_NotesToFinancialStatementsAbstract</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>XPL_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:stringItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_AvailableForSaleSecuritiesAccumulatedGrossUnrealizedGainLossBeforeTax">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div><p>Amount before tax of unrealized gain (loss) in accumulated other comprehensive income (AOCI) on investments in debt and equity securities classified as available-for-sale.</p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;"><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_AvailableForSaleSecuritiesAccumulatedGrossUnrealizedGainLossBeforeTax</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>us-gaap_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:monetaryItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>credit</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>instant</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_InvestmentsFairValueDisclosure">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div><p>Fair value portion of investment securities, including, but not limited to, marketable securities, derivative financial instruments, and investments accounted for under the equity method.</p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://www.xbrl.org/2003/role/disclosureRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 820<br> -SubTopic 10<br> -Section 50<br> -Paragraph 2<br> -Subparagraph (a)<br> -URI http://asc.fasb.org/extlink&amp;oid=99377789&amp;loc=d3e19207-110258<br></p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_InvestmentsFairValueDisclosure</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>us-gaap_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:monetaryItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>debit</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>instant</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_TradingSecuritiesCost">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div><p>Cost of investments in debt and equity securities and other forms of securities that provide ownership interests classified as trading.</p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;"><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_TradingSecuritiesCost</td>
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<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>us-gaap_</td>
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<td><strong> Data Type:</strong></td>
<td>xbrli:monetaryItemType</td>
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<td><strong> Balance Type:</strong></td>
<td>debit</td>
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<td><strong> Period Type:</strong></td>
<td>instant</td>
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<DOCUMENT>
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<html>
<head>
<title></title>
<link rel="stylesheet" type="text/css" href="report.css">
<script type="text/javascript" src="Show.js">/* Do Not Remove This Comment */</script><script type="text/javascript">
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</head>
<body>
<span style="display: none;">v3.8.0.1</span><table class="report" border="0" cellspacing="2" id="idp6795518208">
<tr>
<th class="tl" colspan="1" rowspan="2"><div style="width: 200px;"><strong>Marketable Equity Securities - Changes in Marketable Equity Securities (Details) - USD ($)<br> $ in Thousands</strong></div></th>
<th class="th" colspan="2">3 Months Ended</th>
</tr>
<tr>
<th class="th"><div>Mar. 31, 2018</div></th>
<th class="th"><div>Mar. 31, 2017</div></th>
</tr>
<tr class="re">
<td class="pl " style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_XPL_NotesToFinancialStatementsAbstract', window );"><strong>Notes to Financial Statements</strong></a></td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl custom" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_XPL_CostMarketableSecurities', window );">Cost</a></td>
<td class="text"> <span></span>
</td>
<td class="nump">$ 38<span></span>
</td>
</tr>
<tr class="re">
<td class="pl " style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_RealizedGainLossOnMarketableSecuritiesCostMethodInvestmentsAndOtherInvestments', window );">Realized gain on marketable equity securities sold</a></td>
<td class="text"> <span></span>
</td>
<td class="nump">221<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl " style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_ProceedsFromSaleOfAvailableForSaleSecuritiesEquity', window );">Proceeds from the sale of marketable equity securities sold</a></td>
<td class="text"> <span></span>
</td>
<td class="num">(259)<span></span>
</td>
</tr>
<tr class="re">
<td class="pl " style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_PaymentsToAcquireAvailableForSaleSecurities', window );">Purchase of marketable equity securities</a></td>
<td class="text"> <span></span>
</td>
<td class="nump">477<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl " style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_MarketableSecuritiesUnrealizedGainLoss', window );">Gross unrealized (loss) gain recorded in the statement of operations</a></td>
<td class="num">(441)<span></span>
</td>
<td class="nump">128<span></span>
</td>
</tr>
<tr class="re">
<td class="pl " style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_IncreaseDecreaseInTradingSecurities', window );">Change in marketable equity securities at fair value</a></td>
<td class="num">$ (441)<span></span>
</td>
<td class="nump">$ 346<span></span>
</td>
</tr>
</table>
<div style="display: none;">
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_XPL_CostMarketableSecurities">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- References</a><div><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">XPL_CostMarketableSecurities</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>XPL_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:monetaryItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>debit</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_XPL_NotesToFinancialStatementsAbstract">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- References</a><div><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">XPL_NotesToFinancialStatementsAbstract</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>XPL_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:stringItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_IncreaseDecreaseInTradingSecurities">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div><p>Amount of increase (decrease) of investment in debt and equity securities, measured at fair value with changes in fair value recognized in net income.</p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 230<br> -SubTopic 10<br> -Section 45<br> -Paragraph 28<br> -Subparagraph (a)<br> -URI http://asc.fasb.org/extlink&amp;oid=109223946&amp;loc=d3e3602-108585<br><br>Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 230<br> -SubTopic 10<br> -Section 45<br> -Paragraph 19<br> -URI http://asc.fasb.org/extlink&amp;oid=109223946&amp;loc=d3e3444-108585<br></p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_IncreaseDecreaseInTradingSecurities</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>us-gaap_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:monetaryItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>credit</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_MarketableSecuritiesUnrealizedGainLoss">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div><p>Amount of unrealized gain (loss) on investment in marketable security.</p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 220<br> -SubTopic 10<br> -Section S99<br> -Paragraph 2<br> -Subparagraph (SX 210.5-03(7)(c))<br> -URI http://asc.fasb.org/extlink&amp;oid=115205541&amp;loc=SL114868664-224227<br></p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_MarketableSecuritiesUnrealizedGainLoss</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>us-gaap_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:monetaryItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>credit</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_PaymentsToAcquireAvailableForSaleSecurities">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div><p>The cash outflow to acquire debt and equity securities not classified as either held-to-maturity securities or trading securities which would be classified as available-for-sale securities and reported at fair value, with unrealized gains and losses excluded from earnings and reported in a separate component of shareholders' equity.</p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 320<br> -SubTopic 10<br> -Section 45<br> -Paragraph 11<br> -URI http://asc.fasb.org/extlink&amp;oid=109979856&amp;loc=d3e26853-111562<br><br>Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 230<br> -SubTopic 10<br> -Section 45<br> -Paragraph 13<br> -Subparagraph (a),(b)<br> -URI http://asc.fasb.org/extlink&amp;oid=109223946&amp;loc=d3e3213-108585<br></p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_PaymentsToAcquireAvailableForSaleSecurities</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>us-gaap_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:monetaryItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>credit</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_ProceedsFromSaleOfAvailableForSaleSecuritiesEquity">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div><p>The cash inflow associated with the sale of equity securities classified as available-for-sale securities.</p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 320<br> -SubTopic 10<br> -Section 45<br> -Paragraph 11<br> -URI http://asc.fasb.org/extlink&amp;oid=109979856&amp;loc=d3e26853-111562<br><br>Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 230<br> -SubTopic 10<br> -Section 45<br> -Paragraph 12<br> -Subparagraph (b)<br> -URI http://asc.fasb.org/extlink&amp;oid=109223946&amp;loc=d3e3179-108585<br></p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_ProceedsFromSaleOfAvailableForSaleSecuritiesEquity</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>us-gaap_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:monetaryItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>debit</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_RealizedGainLossOnMarketableSecuritiesCostMethodInvestmentsAndOtherInvestments">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div><p>This item represents the total realized gain (loss) included in earnings for the period as a result of selling marketable securities categorized as trading, available-for-sale, or held-to-maturity and any gains or losses realized during the period from the sale of investments accounted for under the cost method of accounting and/or investments that are separately or otherwise not categorized as trading, available-for-sale, or held-to-maturity. Additionally, this item would include any losses recognized for other than temporary impairments (OTTI) of the subject investments in debt and equity securities.</p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;"><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_RealizedGainLossOnMarketableSecuritiesCostMethodInvestmentsAndOtherInvestments</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>us-gaap_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:monetaryItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>credit</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
</div>
</body>
</html>
</TEXT>
</DOCUMENT>
<DOCUMENT>
<TYPE>XML
<SEQUENCE>38
<FILENAME>R28.htm
<DESCRIPTION>IDEA: XBRL DOCUMENT
<TEXT>
<html>
<head>
<title></title>
<link rel="stylesheet" type="text/css" href="report.css">
<script type="text/javascript" src="Show.js">/* Do Not Remove This Comment */</script><script type="text/javascript">
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<body>
<span style="display: none;">v3.8.0.1</span><table class="report" border="0" cellspacing="2" id="idp6805505680">
<tr>
<th class="tl" colspan="1" rowspan="2"><div style="width: 200px;"><strong>Marketable Equity Securities (Details Narrative) - USD ($)<br> $ in Thousands</strong></div></th>
<th class="th" colspan="1">3 Months Ended</th>
<th class="th" colspan="2">12 Months Ended</th>
<th class="th" colspan="1"></th>
<th class="th" colspan="1"></th>
</tr>
<tr>
<th class="th"><div>Mar. 31, 2017</div></th>
<th class="th"><div>Dec. 31, 2017</div></th>
<th class="th"><div>Dec. 31, 2016</div></th>
<th class="th"><div>Mar. 31, 2018</div></th>
<th class="th"><div>May 02, 2016</div></th>
</tr>
<tr class="re">
<td class="pl " style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_XPL_NotesToFinancialStatementsAbstract', window );"><strong>Notes to Financial Statements</strong></a></td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl custom" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_XPL_UnitsOfSharesAndWarrantsPurchased', window );">Units Vendetta purchased</a></td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="nump">7,240,000<span></span>
</td>
</tr>
<tr class="re">
<td class="pl custom" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_XPL_PriceOfFinancialInstrumentsOwned', window );">Aggregate consideration for units of Vendetta (common stock $186,000; Warrants $103,000)</a></td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="nump">$ 289<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl custom" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_XPL_SharesSoldMarketableEquitySecurities', window );">Common shares Vendetta sold</a></td>
<td class="nump">1,480,000<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="re">
<td class="pl " style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_ProceedsFromSalesOfAssetsInvestingActivities', window );">Proceeds from sale of Vendetta</a></td>
<td class="nump">$ 259<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl custom" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_XPL_CostOfSaleOfAssets', window );">Cost of sale of Vendetta</a></td>
<td class="nump">$ 38<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="re">
<td class="pl custom" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_XPL_MarketableEquitySecuritiesSharesReceivedUponExerciseOfWarrants', window );">Vendetta warrants exercised and shares received</a></td>
<td class="nump">2,240,000<span></span>
</td>
<td class="nump">5,000,000<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl " style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_PaymentsToAcquireMarketableSecurities', window );">US dollar cost of warrants exercised</a></td>
<td class="nump">$ 167<span></span>
</td>
<td class="nump">$ 441<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="re">
<td class="pl custom" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_XPL_IntrinsicValueWarrant', window );">Intrinsic value Vendetta Warrants</a></td>
<td class="nump">309<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl custom" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_XPL_TotalValueWarrant', window );">Total value Vendetta Warrants</a></td>
<td class="nump">$ 476<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="re">
<td class="pl custom" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_XPL_SharesOwnedVendetta', window );">Number of Vendetta shares owned</a></td>
<td class="text">&#160;<span></span>
</td>
<td class="nump">11,000,000<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="nump">11,000,000<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
</table>
<div style="display: none;">
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_XPL_CostOfSaleOfAssets">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- References</a><div><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">XPL_CostOfSaleOfAssets</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>XPL_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:monetaryItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>debit</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_XPL_IntrinsicValueWarrant">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- References</a><div><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">XPL_IntrinsicValueWarrant</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>XPL_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:monetaryItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>debit</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_XPL_MarketableEquitySecuritiesSharesReceivedUponExerciseOfWarrants">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- References</a><div><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">XPL_MarketableEquitySecuritiesSharesReceivedUponExerciseOfWarrants</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>XPL_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:sharesItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_XPL_NotesToFinancialStatementsAbstract">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- References</a><div><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">XPL_NotesToFinancialStatementsAbstract</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>XPL_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:stringItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_XPL_PriceOfFinancialInstrumentsOwned">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- References</a><div><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">XPL_PriceOfFinancialInstrumentsOwned</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>XPL_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:monetaryItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>debit</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_XPL_SharesOwnedVendetta">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- References</a><div><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">XPL_SharesOwnedVendetta</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>XPL_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:sharesItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>instant</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_XPL_SharesSoldMarketableEquitySecurities">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- References</a><div><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">XPL_SharesSoldMarketableEquitySecurities</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>XPL_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:sharesItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_XPL_TotalValueWarrant">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- References</a><div><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">XPL_TotalValueWarrant</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>XPL_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:monetaryItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>debit</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_XPL_UnitsOfSharesAndWarrantsPurchased">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- References</a><div><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">XPL_UnitsOfSharesAndWarrantsPurchased</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>XPL_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:sharesItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>instant</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_PaymentsToAcquireMarketableSecurities">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div><p>Amount of cash outflow for purchase of marketable security.</p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 320<br> -SubTopic 10<br> -Section 45<br> -Paragraph 11<br> -URI http://asc.fasb.org/extlink&amp;oid=109979856&amp;loc=d3e26853-111562<br></p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_PaymentsToAcquireMarketableSecurities</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>us-gaap_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:monetaryItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>credit</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_ProceedsFromSalesOfAssetsInvestingActivities">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div><p>Aggregate cash proceeds received from a combination of transactions that are classified as investing activities in which assets, which may include one or more investments, are sold to third-party buyers. This element can be used by entities to aggregate proceeds from all asset sales that are classified as investing activities.</p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 230<br> -SubTopic 10<br> -Section 45<br> -Paragraph 12<br> -URI http://asc.fasb.org/extlink&amp;oid=109223946&amp;loc=d3e3179-108585<br></p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_ProceedsFromSalesOfAssetsInvestingActivities</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>us-gaap_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:monetaryItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>debit</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
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<span style="display: none;">v3.8.0.1</span><table class="report" border="0" cellspacing="2" id="idp6633731200">
<tr>
<th class="tl" colspan="1" rowspan="1"><div style="width: 200px;"><strong>Other Assets - Other Assets (Details) - USD ($)<br> $ in Thousands</strong></div></th>
<th class="th"><div>Mar. 31, 2018</div></th>
<th class="th"><div>Dec. 31, 2017</div></th>
</tr>
<tr class="re">
<td class="pl " style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_DeferredCostsCapitalizedPrepaidAndOtherAssetsDisclosureAbstract', window );"><strong>Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]</strong></a></td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl " style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_PropertyPlantAndEquipmentNet', window );">Furniture and fixtures, net of accumulated depreciation</a></td>
<td class="nump">$ 38<span></span>
</td>
<td class="nump">$ 31<span></span>
</td>
</tr>
<tr class="re">
<td class="pl " style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedEquipment', window );">Lik project equipment, net of accumulated depreciation</a></td>
<td class="nump">85<span></span>
</td>
<td class="nump">90<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl custom" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_XPL_OtherAssetsVendettaWarrants', window );">Exploration bonds and other assets</a></td>
<td class="nump">4<span></span>
</td>
<td class="nump">4<span></span>
</td>
</tr>
<tr class="re">
<td class="pl " style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_OtherAssets', window );">Total other assets</a></td>
<td class="nump">$ 127<span></span>
</td>
<td class="nump">$ 125<span></span>
</td>
</tr>
</table>
<div style="display: none;">
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_XPL_OtherAssetsVendettaWarrants">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- References</a><div><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">XPL_OtherAssetsVendettaWarrants</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>XPL_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:monetaryItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>debit</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>instant</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedEquipment">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div><p>Amount of tangible personal property used to produce goods and services, including, but is not limited to, tools, dies and molds, computer and office equipment, acquired at the acquisition date.</p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 805<br> -SubTopic 20<br> -Section 50<br> -Paragraph 1<br> -Subparagraph (c)<br> -URI http://asc.fasb.org/extlink&amp;oid=84161108&amp;loc=d3e4845-128472<br></p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedEquipment</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>us-gaap_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:monetaryItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>debit</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>instant</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_DeferredCostsCapitalizedPrepaidAndOtherAssetsDisclosureAbstract">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- References</a><div><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_DeferredCostsCapitalizedPrepaidAndOtherAssetsDisclosureAbstract</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>us-gaap_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:stringItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_OtherAssets">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div><p>Amount of assets classified as other.</p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 210<br> -SubTopic 10<br> -Section S99<br> -Paragraph 1<br> -Subparagraph (SX 210.5-02(17))<br> -URI http://asc.fasb.org/extlink&amp;oid=6877327&amp;loc=d3e13212-122682<br><br>Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 942<br> -SubTopic 210<br> -Section S99<br> -Paragraph 1<br> -Subparagraph (SX 210.9-03(10))<br> -URI http://asc.fasb.org/extlink&amp;oid=6876686&amp;loc=d3e534808-122878<br><br>Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 944<br> -SubTopic 210<br> -Section S99<br> -Paragraph 1<br> -Subparagraph (SX 210.7-03(a)(10))<br> -URI http://asc.fasb.org/extlink&amp;oid=6879938&amp;loc=d3e572229-122910<br></p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_OtherAssets</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>us-gaap_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:monetaryItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>debit</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>instant</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_PropertyPlantAndEquipmentNet">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div><p>Amount after accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business to produce goods and services and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures.</p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 210<br> -SubTopic 10<br> -Section S99<br> -Paragraph 1<br> -Subparagraph (SX 210.5-02(14))<br> -URI http://asc.fasb.org/extlink&amp;oid=6877327&amp;loc=d3e13212-122682<br><br>Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 360<br> -SubTopic 10<br> -Section 50<br> -Paragraph 1<br> -URI http://asc.fasb.org/extlink&amp;oid=6391035&amp;loc=d3e2868-110229<br><br>Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 944<br> -SubTopic 210<br> -Section S99<br> -Paragraph 1<br> -Subparagraph (SX 210.7-03(a)(8))<br> -URI http://asc.fasb.org/extlink&amp;oid=6879938&amp;loc=d3e572229-122910<br><br>Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 210<br> -SubTopic 10<br> -Section S99<br> -Paragraph 1<br> -Subparagraph (SX 210.5-02(13))<br> -URI http://asc.fasb.org/extlink&amp;oid=6877327&amp;loc=d3e13212-122682<br></p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_PropertyPlantAndEquipmentNet</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>us-gaap_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:monetaryItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>debit</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>instant</td>
</tr>
</table></div>
</div></td></tr>
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<html>
<head>
<title></title>
<link rel="stylesheet" type="text/css" href="report.css">
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<span style="display: none;">v3.8.0.1</span><table class="report" border="0" cellspacing="2" id="idp6770688544">
<tr>
<th class="tl" colspan="1" rowspan="2"><div style="width: 200px;"><strong>Derivative Instruments - Gain on Derivative Instruments (Details) - USD ($)<br> $ in Thousands</strong></div></th>
<th class="th" colspan="1">3 Months Ended</th>
<th class="th" colspan="1">12 Months Ended</th>
</tr>
<tr>
<th class="th"><div>Mar. 31, 2018</div></th>
<th class="th"><div>Dec. 31, 2017</div></th>
</tr>
<tr class="re">
<td class="pl " style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_DerivativeInstrumentsAndHedgingActivitiesDisclosureAbstract', window );"><strong>Derivative Instruments and Hedging Activities Disclosure [Abstract]</strong></a></td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl custom" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_XPL_GainOnCalls', window );">Gain on Kinross calls</a></td>
<td class="text"> <span></span>
</td>
<td class="nump">$ 24<span></span>
</td>
</tr>
<tr class="re">
<td class="pl custom" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_XPL_GainOnWarrants', window );">Gain on Vendetta Warrants</a></td>
<td class="text"> <span></span>
</td>
<td class="nump">148<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl custom" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_XPL_DerivativeInstrumentsNotDesignatedAsHedgingInstrumentsGainLossNet2', window );">Gain on derivative instruments</a></td>
<td class="text"> <span></span>
</td>
<td class="nump">$ 172<span></span>
</td>
</tr>
</table>
<div style="display: none;">
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_XPL_DerivativeInstrumentsNotDesignatedAsHedgingInstrumentsGainLossNet2">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- References</a><div><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">XPL_DerivativeInstrumentsNotDesignatedAsHedgingInstrumentsGainLossNet2</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>XPL_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:monetaryItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>credit</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_XPL_GainOnCalls">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- References</a><div><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">XPL_GainOnCalls</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>XPL_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:monetaryItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>debit</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_XPL_GainOnWarrants">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- References</a><div><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">XPL_GainOnWarrants</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>XPL_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:monetaryItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>debit</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_DerivativeInstrumentsAndHedgingActivitiesDisclosureAbstract">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- References</a><div><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_DerivativeInstrumentsAndHedgingActivitiesDisclosureAbstract</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>us-gaap_</td>
</tr>
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<td><strong> Data Type:</strong></td>
<td>xbrli:stringItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
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<DOCUMENT>
<TYPE>XML
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<TEXT>
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<head>
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<span style="display: none;">v3.8.0.1</span><table class="report" border="0" cellspacing="2" id="idp6796461328">
<tr>
<th class="tl" colspan="1" rowspan="2"><div style="width: 200px;"><strong>Derivative Instruments (Details Narrative)<br> $ in Thousands</strong></div></th>
<th class="th" colspan="1">3 Months Ended</th>
</tr>
<tr><th class="th">
<div>Mar. 31, 2017 </div>
<div>USD ($)</div>
</th></tr>
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<td class="pl " style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_DerivativeInstrumentsAndHedgingActivitiesDisclosureAbstract', window );"><strong>Derivative Instruments and Hedging Activities Disclosure [Abstract]</strong></a></td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl " style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_GainLossOnDerivativeInstrumentsNetPretax', window );">Gain on derivative instruments</a></td>
<td class="nump">$ 148,000<span></span>
</td>
</tr>
</table>
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<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- References</a><div><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_DerivativeInstrumentsAndHedgingActivitiesDisclosureAbstract</td>
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<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
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<td><strong> Balance Type:</strong></td>
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<td><strong> Period Type:</strong></td>
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<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div><p>Aggregate net gain (loss) on all derivative instruments recognized in earnings during the period, before tax effects.</p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 815<br> -SubTopic 10<br> -Section 50<br> -Paragraph 4A<br> -Subparagraph (b)<br> -URI http://asc.fasb.org/extlink&amp;oid=109980867&amp;loc=SL5618551-113959<br></p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_GainLossOnDerivativeInstrumentsNetPretax</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>us-gaap_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:monetaryItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>credit</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
</div>
</body>
</html>
</TEXT>
</DOCUMENT>
<DOCUMENT>
<TYPE>XML
<SEQUENCE>42
<FILENAME>R32.htm
<DESCRIPTION>IDEA: XBRL DOCUMENT
<TEXT>
<html>
<head>
<title></title>
<link rel="stylesheet" type="text/css" href="report.css">
<script type="text/javascript" src="Show.js">/* Do Not Remove This Comment */</script><script type="text/javascript">
							function toggleNextSibling (e) {
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<body>
<span style="display: none;">v3.8.0.1</span><table class="report" border="0" cellspacing="2" id="idp6805741008">
<tr>
<th class="tl" colspan="1" rowspan="1"><div style="width: 200px;"><strong>Fair Value - Financial Assets and Liabilities Measured at Fair Value (Details) - USD ($)<br> $ in Thousands</strong></div></th>
<th class="th"><div>Mar. 31, 2018</div></th>
<th class="th"><div>Dec. 31, 2017</div></th>
</tr>
<tr class="re">
<td class="pl " style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_InvestmentsFairValueDisclosure', window );">Marketable equity securities</a></td>
<td class="nump">$ 2,202<span></span>
</td>
<td class="nump">$ 2,643<span></span>
</td>
</tr>
<tr class="rh">
<td class="pl " style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_FairValueByFairValueHierarchyLevelAxis=us-gaap_FairValueInputsLevel1Member', window );">Level 1</a></td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="re">
<td class="pl " style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_InvestmentsFairValueDisclosure', window );">Marketable equity securities</a></td>
<td class="nump">2,202<span></span>
</td>
<td class="nump">2,643<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl " style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_FinancialInstrumentsOwnedUSGovernmentAndAgencyObligationsAtFairValue', window );">United States Treasury securities</a></td>
<td class="nump">9,976<span></span>
</td>
<td class="nump">10,395<span></span>
</td>
</tr>
<tr class="re">
<td class="pl custom" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_XPL_CertificatesOfDepositAtFairValue', window );">Bank Certificates of Deposit</a></td>
<td class="nump">1,247<span></span>
</td>
<td class="nump">1,247<span></span>
</td>
</tr>
<tr class="rh">
<td class="pl " style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_FairValueByFairValueHierarchyLevelAxis=us-gaap_FairValueInputsLevel2Member', window );">Level 2</a></td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="re">
<td class="pl " style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_InvestmentsFairValueDisclosure', window );">Marketable equity securities</a></td>
<td class="text"> <span></span>
</td>
<td class="text"> <span></span>
</td>
</tr>
<tr class="ro">
<td class="pl " style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_FinancialInstrumentsOwnedUSGovernmentAndAgencyObligationsAtFairValue', window );">United States Treasury securities</a></td>
<td class="text"> <span></span>
</td>
<td class="text"> <span></span>
</td>
</tr>
<tr class="re">
<td class="pl custom" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_XPL_CertificatesOfDepositAtFairValue', window );">Bank Certificates of Deposit</a></td>
<td class="text"> <span></span>
</td>
<td class="text"> <span></span>
</td>
</tr>
<tr class="rh">
<td class="pl " style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_FairValueByFairValueHierarchyLevelAxis=us-gaap_FairValueInputsLevel3Member', window );">Level 3</a></td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="re">
<td class="pl " style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_InvestmentsFairValueDisclosure', window );">Marketable equity securities</a></td>
<td class="text"> <span></span>
</td>
<td class="text"> <span></span>
</td>
</tr>
<tr class="ro">
<td class="pl " style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_FinancialInstrumentsOwnedUSGovernmentAndAgencyObligationsAtFairValue', window );">United States Treasury securities</a></td>
<td class="text"> <span></span>
</td>
<td class="text"> <span></span>
</td>
</tr>
<tr class="re">
<td class="pl custom" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_XPL_CertificatesOfDepositAtFairValue', window );">Bank Certificates of Deposit</a></td>
<td class="text"> <span></span>
</td>
<td class="text"> <span></span>
</td>
</tr>
</table>
<div style="display: none;">
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_XPL_CertificatesOfDepositAtFairValue">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- References</a><div><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">XPL_CertificatesOfDepositAtFairValue</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>XPL_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:monetaryItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>credit</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>instant</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_FinancialInstrumentsOwnedUSGovernmentAndAgencyObligationsAtFairValue">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div><p>The fair value as of the balance sheet date of firm holdings in debt obligations issued by the US government including short-term Treasury bills, medium-term Treasury notes, and long-term Treasury bonds, as well as debt issued by agencies. Includes both pledged (to counterparties as collateral for financing transactions) and unpledged holdings.</p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 940<br> -SubTopic 320<br> -Section 45<br> -Paragraph 2<br> -URI http://asc.fasb.org/extlink&amp;oid=35711157&amp;loc=d3e42546-110969<br></p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_FinancialInstrumentsOwnedUSGovernmentAndAgencyObligationsAtFairValue</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>us-gaap_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:monetaryItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>debit</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>instant</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_InvestmentsFairValueDisclosure">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div><p>Fair value portion of investment securities, including, but not limited to, marketable securities, derivative financial instruments, and investments accounted for under the equity method.</p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://www.xbrl.org/2003/role/disclosureRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 820<br> -SubTopic 10<br> -Section 50<br> -Paragraph 2<br> -Subparagraph (a)<br> -URI http://asc.fasb.org/extlink&amp;oid=99377789&amp;loc=d3e19207-110258<br></p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_InvestmentsFairValueDisclosure</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>us-gaap_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:monetaryItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>debit</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>instant</td>
</tr>
</table></div>
</div></td></tr>
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<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_FairValueByFairValueHierarchyLevelAxis=us-gaap_FairValueInputsLevel1Member">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Details</a><div><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_FairValueByFairValueHierarchyLevelAxis=us-gaap_FairValueInputsLevel1Member</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td></td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td></td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td></td>
</tr>
</table></div>
</div></td></tr>
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<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_FairValueByFairValueHierarchyLevelAxis=us-gaap_FairValueInputsLevel2Member">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Details</a><div><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_FairValueByFairValueHierarchyLevelAxis=us-gaap_FairValueInputsLevel2Member</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td></td>
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<tr>
<td><strong> Data Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td></td>
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<tr>
<td><strong> Period Type:</strong></td>
<td></td>
</tr>
</table></div>
</div></td></tr>
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<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_FairValueByFairValueHierarchyLevelAxis=us-gaap_FairValueInputsLevel3Member">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Details</a><div><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_FairValueByFairValueHierarchyLevelAxis=us-gaap_FairValueInputsLevel3Member</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td></td>
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<td><strong> Data Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td></td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td></td>
</tr>
</table></div>
</div></td></tr>
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</div>
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</html>
</TEXT>
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<DOCUMENT>
<TYPE>XML
<SEQUENCE>43
<FILENAME>R33.htm
<DESCRIPTION>IDEA: XBRL DOCUMENT
<TEXT>
<html>
<head>
<title></title>
<link rel="stylesheet" type="text/css" href="report.css">
<script type="text/javascript" src="Show.js">/* Do Not Remove This Comment */</script><script type="text/javascript">
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<span style="display: none;">v3.8.0.1</span><table class="report" border="0" cellspacing="2" id="idp6805561728">
<tr>
<th class="tl" colspan="1" rowspan="2"><div style="width: 200px;"><strong>Employee Stock Compensation Plans (Details Narrative) - USD ($)<br> $ in Thousands</strong></div></th>
<th class="th" colspan="1">3 Months Ended</th>
<th class="th" colspan="1"></th>
<th class="th" colspan="1"></th>
<th class="th" colspan="1"></th>
<th class="th" colspan="1"></th>
</tr>
<tr>
<th class="th"><div>Mar. 31, 2018</div></th>
<th class="th"><div>Dec. 31, 2017</div></th>
<th class="th"><div>Sep. 01, 2017</div></th>
<th class="th"><div>Jun. 29, 2017</div></th>
<th class="th"><div>Jun. 18, 2013</div></th>
</tr>
<tr class="re">
<td class="pl " style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_DisclosureOfCompensationRelatedCostsSharebasedPaymentsAbstract', window );"><strong>Disclosure of Compensation Related Costs, Share-based Payments [Abstract]</strong></a></td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl " style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized', window );">Shares reserved for awards under 2013 Plan</a></td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="nump">5,750,000<span></span>
</td>
<td class="nump">1,750,000<span></span>
</td>
</tr>
<tr class="re">
<td class="pl " style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingNumber', window );">Options outstandiing with exercise prices between $0.54 and $1.74</a></td>
<td class="nump">2,082,428<span></span>
</td>
<td class="nump">1,928,428<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl " style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross', window );">Options issued to consultant at exercise price of $0.62 per share</a></td>
<td class="nump">100,000<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="re">
<td class="pl " style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedInPeriodFairValue1', window );">Grant date fair value of options issued to consultant</a></td>
<td class="nump">$ 12<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl " style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_AllocatedShareBasedCompensationExpense', window );">Stock option compensation expense recorded</a></td>
<td class="nump">$ 10<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="re">
<td class="pl custom" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_XPL_ConditionalOptionGrant', window );">Additional options granted at $0.77 per share subject to shareholder approval</a></td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="nump">2,300,000<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl custom" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_XPL_GrantDateFairValueConditionalOptionGrant', window );">Grant date fair value additional options</a></td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="nump">$ 970<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
</table>
<div style="display: none;">
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_XPL_ConditionalOptionGrant">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- References</a><div><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">XPL_ConditionalOptionGrant</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>XPL_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:sharesItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>instant</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_XPL_GrantDateFairValueConditionalOptionGrant">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- References</a><div><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">XPL_GrantDateFairValueConditionalOptionGrant</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>XPL_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:monetaryItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>debit</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>instant</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_AllocatedShareBasedCompensationExpense">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div><p>Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees.</p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 718<br> -SubTopic 10<br> -Section 50<br> -Paragraph 1<br> -Subparagraph (b)<br> -URI http://asc.fasb.org/extlink&amp;oid=109197908&amp;loc=d3e5047-113901<br><br>Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 718<br> -SubTopic 10<br> -Section S99<br> -Paragraph 1<br> -Subparagraph (SAB Topic 14.F)<br> -URI http://asc.fasb.org/extlink&amp;oid=115993241&amp;loc=d3e301413-122809<br><br>Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 718<br> -SubTopic 10<br> -Section 50<br> -Paragraph 2<br> -Subparagraph (h)(1)(i)<br> -URI http://asc.fasb.org/extlink&amp;oid=109197908&amp;loc=d3e5070-113901<br></p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_AllocatedShareBasedCompensationExpense</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>us-gaap_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:monetaryItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>debit</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_DisclosureOfCompensationRelatedCostsSharebasedPaymentsAbstract">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- References</a><div><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_DisclosureOfCompensationRelatedCostsSharebasedPaymentsAbstract</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>us-gaap_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:stringItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div><p>The maximum number of shares (or other type of equity) originally approved (usually by shareholders and board of directors), net of any subsequent amendments and adjustments, for awards under the equity-based compensation plan. As stock or unit options and equity instruments other than options are awarded to participants, the shares or units remain authorized and become reserved for issuance under outstanding awards (not necessarily vested).</p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 718<br> -SubTopic 10<br> -Section 50<br> -Paragraph 2<br> -Subparagraph (a)(3)<br> -URI http://asc.fasb.org/extlink&amp;oid=109197908&amp;loc=d3e5070-113901<br></p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>us-gaap_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:sharesItemType</td>
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<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
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<tr>
<td><strong> Period Type:</strong></td>
<td>instant</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div><p>Gross number of share options (or share units) granted during the period.</p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;"><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>us-gaap_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:sharesItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingNumber">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div><p>Number of fully vested and expected to vest options outstanding that can be converted into shares under option plan. Includes, but is not limited to, unvested options for which requisite service period has not been rendered but that are expected to vest based on achievement of performance condition, if forfeitures are recognized when they occur.</p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 718<br> -SubTopic 10<br> -Section 50<br> -Paragraph 2<br> -Subparagraph (e)(1)<br> -URI http://asc.fasb.org/extlink&amp;oid=109197908&amp;loc=d3e5070-113901<br></p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingNumber</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>us-gaap_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:sharesItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>instant</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedInPeriodFairValue1">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div><p>Fair value of options vested. Excludes equity instruments other than options, for example, but not limited to, share units, stock appreciation rights, restricted stock.</p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 718<br> -SubTopic 10<br> -Section 50<br> -Paragraph 2<br> -Subparagraph (c)<br> -URI http://asc.fasb.org/extlink&amp;oid=109197908&amp;loc=d3e5070-113901<br></p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedInPeriodFairValue1</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>us-gaap_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:monetaryItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>credit</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
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<span style="display: none;">v3.8.0.1</span><table class="report" border="0" cellspacing="2" id="idp6805920160">
<tr>
<th class="tl" colspan="1" rowspan="2"><div style="width: 200px;"><strong>Shareholders' Equity and Other Comprehensive Income - Shareholders' Equity and Accumulated Other Comprehensive Income (Details) - USD ($)<br> $ in Thousands</strong></div></th>
<th class="th" colspan="2">3 Months Ended</th>
<th class="th" colspan="1"></th>
</tr>
<tr>
<th class="th"><div>Mar. 31, 2018</div></th>
<th class="th"><div>Mar. 31, 2017</div></th>
<th class="th"><div>Dec. 31, 2017</div></th>
</tr>
<tr class="re">
<td class="pl " style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_NetIncomeLoss', window );">Net loss</a></td>
<td class="text">&#160;<span></span>
</td>
<td class="num">$ (106)<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="rh">
<td class="pl " style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_ShareholdersEquityClassAxis=us-gaap_CommonStockMember', window );">Common Stock</a></td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="re">
<td class="pl custom" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_XPL_BalanceStockholdersEquiityBeginning', window );">Balance at December 31, 2017 58,434,566 shares</a></td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="nump">$ 584<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl custom" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_XPL_BalanceStockholdersEquityEnding', window );">Balance at March 31, 2018 58,381,952 shares</a></td>
<td class="nump">$ 584<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="rh">
<td class="pl " style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_ShareholdersEquityClassAxis=us-gaap_AdditionalPaidInCapitalMember', window );">Additional Paid-in Capital</a></td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl custom" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_XPL_BalanceStockholdersEquiityBeginning', window );">Balance at December 31, 2017 58,434,566 shares</a></td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="nump">69,312<span></span>
</td>
</tr>
<tr class="re">
<td class="pl " style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_AdjustmentsToAdditionalPaidInCapitalShareBasedCompensationStockOptionsRequisiteServicePeriodRecognition', window );">Stock option expense</a></td>
<td class="nump">10<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl " style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_StockRepurchasedAndRetiredDuringPeriodValue', window );">Purchase of 52,614 shares for cancellation</a></td>
<td class="num">(26)<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="re">
<td class="pl custom" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_XPL_BalanceStockholdersEquityEnding', window );">Balance at March 31, 2018 58,381,952 shares</a></td>
<td class="nump">69,296<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="rh">
<td class="pl " style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_ShareholdersEquityClassAxis=XPL_AccumulatedDeficitMember', window );">Accumulated Deficit</a></td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="re">
<td class="pl custom" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_XPL_BalanceStockholdersEquiityBeginning', window );">Balance at December 31, 2017 58,434,566 shares</a></td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="num">(39,767)<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl " style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_NetIncomeLoss', window );">Net loss</a></td>
<td class="num">(1,004)<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="re">
<td class="pl custom" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_XPL_BalanceStockholdersEquityEnding', window );">Balance at March 31, 2018 58,381,952 shares</a></td>
<td class="num">(40,771)<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="rh">
<td class="pl " style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_ShareholdersEquityClassAxis=us-gaap_AccumulatedOtherComprehensiveIncomeMember', window );">Accumulated Other Comprehensive Income</a></td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="re">
<td class="pl custom" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_XPL_BalanceStockholdersEquiityBeginning', window );">Balance at December 31, 2017 58,434,566 shares</a></td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text"> <span></span>
</td>
</tr>
<tr class="ro">
<td class="pl custom" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_XPL_BalanceStockholdersEquityEnding', window );">Balance at March 31, 2018 58,381,952 shares</a></td>
<td class="text"> <span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="rh">
<td class="pl " style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_ShareholdersEquityClassAxis=XPL_TotalShareholdersEquityMember', window );">Total Shareholders' Equity</a></td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl custom" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_XPL_BalanceStockholdersEquiityBeginning', window );">Balance at December 31, 2017 58,434,566 shares</a></td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="nump">$ 30,129<span></span>
</td>
</tr>
<tr class="re">
<td class="pl " style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_AdjustmentsToAdditionalPaidInCapitalShareBasedCompensationStockOptionsRequisiteServicePeriodRecognition', window );">Stock option expense</a></td>
<td class="nump">10<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl " style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_StockRepurchasedAndRetiredDuringPeriodValue', window );">Purchase of 52,614 shares for cancellation</a></td>
<td class="num">(26)<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="re">
<td class="pl " style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_NetIncomeLoss', window );">Net loss</a></td>
<td class="num">(1,004)<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl custom" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_XPL_BalanceStockholdersEquityEnding', window );">Balance at March 31, 2018 58,381,952 shares</a></td>
<td class="nump">$ 29,109<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
</table>
<div style="display: none;">
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_XPL_BalanceStockholdersEquiityBeginning">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- References</a><div><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">XPL_BalanceStockholdersEquiityBeginning</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>XPL_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:monetaryItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>debit</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>instant</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_XPL_BalanceStockholdersEquityEnding">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- References</a><div><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">XPL_BalanceStockholdersEquityEnding</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>XPL_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:monetaryItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>debit</td>
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<tr>
<td><strong> Period Type:</strong></td>
<td>instant</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_AdjustmentsToAdditionalPaidInCapitalShareBasedCompensationStockOptionsRequisiteServicePeriodRecognition">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div><p>Amount of increase to additional paid-in capital (APIC) from recognition of equity-based compensation for stock options.</p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;"><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_AdjustmentsToAdditionalPaidInCapitalShareBasedCompensationStockOptionsRequisiteServicePeriodRecognition</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>us-gaap_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:monetaryItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>credit</td>
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<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_NetIncomeLoss">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div><p>The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.</p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://www.xbrl.org/2003/role/disclosureRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 220<br> -SubTopic 10<br> -Section 45<br> -Paragraph 1A<br> -Subparagraph (a)<br> -URI http://asc.fasb.org/extlink&amp;oid=114867106&amp;loc=SL7669619-108580<br><br>Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 942<br> -SubTopic 220<br> -Section S99<br> -Paragraph 1<br> -Subparagraph (SX 210.9-04(22))<br> -URI http://asc.fasb.org/extlink&amp;oid=114873765&amp;loc=SL114874048-224260<br><br>Reference 3: http://www.xbrl.org/2003/role/disclosureRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 220<br> -SubTopic 10<br> -Section 45<br> -Paragraph 1B<br> -Subparagraph (a)<br> -URI http://asc.fasb.org/extlink&amp;oid=114867106&amp;loc=SL7669625-108580<br><br>Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 944<br> -SubTopic 220<br> -Section S99<br> -Paragraph 1<br> -Subparagraph (SX 210.7-04(18))<br> -URI http://asc.fasb.org/extlink&amp;oid=114873790&amp;loc=SL114874131-224263<br><br>Reference 5: http://fasb.org/us-gaap/role/ref/legacyRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 220<br> -SubTopic 10<br> -Section S99<br> -Paragraph 2<br> -Subparagraph (SX 210.5-03(20))<br> -URI http://asc.fasb.org/extlink&amp;oid=115205541&amp;loc=SL114868664-224227<br><br>Reference 6: http://fasb.org/us-gaap/role/ref/legacyRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 230<br> -SubTopic 10<br> -Section 45<br> -Paragraph 28<br> -URI http://asc.fasb.org/extlink&amp;oid=109223946&amp;loc=d3e3602-108585<br><br>Reference 7: http://fasb.org/us-gaap/role/ref/legacyRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 260<br> -SubTopic 10<br> -Section 50<br> -Paragraph 1<br> -URI http://asc.fasb.org/extlink&amp;oid=6371337&amp;loc=d3e3550-109257<br></p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_NetIncomeLoss</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>us-gaap_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:monetaryItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>credit</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
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<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_StockRepurchasedAndRetiredDuringPeriodValue">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div><p>Equity impact of the value of stock that has been repurchased and retired during the period. The excess of the purchase price over par value can be charged against retained earnings (once the excess is fully allocated to additional paid in capital).</p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 210<br> -SubTopic 10<br> -Section S99<br> -Paragraph 1<br> -Subparagraph (SX 210.5-02(28))<br> -URI http://asc.fasb.org/extlink&amp;oid=6877327&amp;loc=d3e13212-122682<br><br>Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 210<br> -SubTopic 10<br> -Section S99<br> -Paragraph 1<br> -Subparagraph (SX 210.5-02(29))<br> -URI http://asc.fasb.org/extlink&amp;oid=6877327&amp;loc=d3e13212-122682<br><br>Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 505<br> -SubTopic 10<br> -Section 50<br> -Paragraph 2<br> -URI http://asc.fasb.org/extlink&amp;oid=109259400&amp;loc=d3e21463-112644<br><br>Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 505<br> -SubTopic 10<br> -Section S99<br> -Paragraph 1<br> -Subparagraph (SX 210.3-04)<br> -URI http://asc.fasb.org/extlink&amp;oid=27012166&amp;loc=d3e187085-122770<br></p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_StockRepurchasedAndRetiredDuringPeriodValue</td>
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<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
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<td><strong> Data Type:</strong></td>
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<td><strong> Balance Type:</strong></td>
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<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
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<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_ShareholdersEquityClassAxis=us-gaap_CommonStockMember">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Details</a><div><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_ShareholdersEquityClassAxis=us-gaap_CommonStockMember</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td></td>
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<td><strong> Data Type:</strong></td>
<td>na</td>
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<td><strong> Balance Type:</strong></td>
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<tr>
<td><strong> Period Type:</strong></td>
<td></td>
</tr>
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<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_ShareholdersEquityClassAxis=us-gaap_AdditionalPaidInCapitalMember">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Details</a><div><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_ShareholdersEquityClassAxis=us-gaap_AdditionalPaidInCapitalMember</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
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<td><strong> Data Type:</strong></td>
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<td><strong> Balance Type:</strong></td>
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<td><strong> Period Type:</strong></td>
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<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_ShareholdersEquityClassAxis=XPL_AccumulatedDeficitMember">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Details</a><div><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_ShareholdersEquityClassAxis=XPL_AccumulatedDeficitMember</td>
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<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td></td>
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<td><strong> Data Type:</strong></td>
<td>na</td>
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<td><strong> Balance Type:</strong></td>
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<td><strong> Period Type:</strong></td>
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<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_ShareholdersEquityClassAxis=us-gaap_AccumulatedOtherComprehensiveIncomeMember">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Details</a><div><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_ShareholdersEquityClassAxis=us-gaap_AccumulatedOtherComprehensiveIncomeMember</td>
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<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td></td>
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<td><strong> Data Type:</strong></td>
<td>na</td>
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<td><strong> Balance Type:</strong></td>
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<td><strong> Period Type:</strong></td>
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<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_ShareholdersEquityClassAxis=XPL_TotalShareholdersEquityMember">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Details</a><div><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_ShareholdersEquityClassAxis=XPL_TotalShareholdersEquityMember</td>
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<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
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<td><strong> Data Type:</strong></td>
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<td><strong> Balance Type:</strong></td>
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<td><strong> Period Type:</strong></td>
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<span style="display: none;">v3.8.0.1</span><table class="report" border="0" cellspacing="2" id="idp6795707184">
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<th class="tl" colspan="1" rowspan="2"><div style="width: 200px;"><strong>Shareholders' Equity and Other Comprehensive Income (Details Narrative) - USD ($)<br> $ in Thousands</strong></div></th>
<th class="th" colspan="2">3 Months Ended</th>
<th class="th" colspan="1"></th>
</tr>
<tr>
<th class="th"><div>Mar. 31, 2018</div></th>
<th class="th"><div>Mar. 31, 2017</div></th>
<th class="th"><div>Oct. 28, 2015</div></th>
</tr>
<tr class="re">
<td class="pl " style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_XPL_NotesToFinancialStatementsAbstract', window );"><strong>Notes to Financial Statements</strong></a></td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
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<td class="pl " style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_RealizedGainLossOnMarketableSecuritiesCostMethodInvestmentsAndOtherInvestments', window );">Previously recorded gain on sale of marketable equity securities</a></td>
<td class="text"> <span></span>
</td>
<td class="nump">$ 221<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="re">
<td class="pl " style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_MarketableSecuritiesUnrealizedGainLoss', window );">Gross unrealized (loss) gain recorded in the statement of operations</a></td>
<td class="num">$ (441)<span></span>
</td>
<td class="nump">128<span></span>
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<td class="text">&#160;<span></span>
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<td class="pl " style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_CumulativeEffectOnRetainedEarningsNetOfTax1', window );">Increase in prior year net loss of $13,000 due to change in accounting principle</a></td>
<td class="text">&#160;<span></span>
</td>
<td class="nump">$ 106<span></span>
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<td class="text">&#160;<span></span>
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<td class="pl " style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_StockRepurchaseProgramNumberOfSharesAuthorizedToBeRepurchased', window );">Shares authorized for repurchase</a></td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="nump">2,000,000<span></span>
</td>
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<tr class="ro">
<td class="pl " style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_StockRepurchasedDuringPeriodShares', window );">Shares repurchased</a></td>
<td class="nump">52,614<span></span>
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<td class="nump">8,400<span></span>
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<td class="text">&#160;<span></span>
</td>
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<tr class="re">
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<td class="nump">$ 26<span></span>
</td>
<td class="nump">$ 6<span></span>
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<td class="text">&#160;<span></span>
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<tr class="ro">
<td class="pl custom" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_XPL_StockRepurchaseProgramNumberOfSharesPurchasedSinceInception', window );">Total number of shares repurchased</a></td>
<td class="nump">720,414<span></span>
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<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
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<tr class="re">
<td class="pl custom" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_XPL_StockRepurchaseProgramAggregatePurchasePriceSinceInception', window );">Aggregate total repurchase price</a></td>
<td class="nump">$ 374<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
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<div style="display: none;">
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_XPL_NotesToFinancialStatementsAbstract">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- References</a><div><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">XPL_NotesToFinancialStatementsAbstract</td>
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<td><strong> Period Type:</strong></td>
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<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- References</a><div><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">XPL_StockRepurchaseProgramAggregatePurchasePriceSinceInception</td>
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<td>duration</td>
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<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- References</a><div><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">XPL_StockRepurchaseProgramNumberOfSharesPurchasedSinceInception</td>
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<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
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<td>xbrli:sharesItemType</td>
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<td><strong> Balance Type:</strong></td>
<td>na</td>
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<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
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<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_XPL_StockRepurchasedAndRetiredDuringPeriodValue2">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- References</a><div><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">XPL_StockRepurchasedAndRetiredDuringPeriodValue2</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>XPL_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:monetaryItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>debit</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
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<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_CumulativeEffectOnRetainedEarningsNetOfTax1">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div><p>Amount of the cumulative effect on retained earnings net of related income tax effect.</p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 250<br> -SubTopic 10<br> -Section 50<br> -Paragraph 9<br> -URI http://asc.fasb.org/extlink&amp;oid=109234566&amp;loc=d3e22663-107794<br></p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_CumulativeEffectOnRetainedEarningsNetOfTax1</td>
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<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
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<td><strong> Balance Type:</strong></td>
<td>credit</td>
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<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
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<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_MarketableSecuritiesUnrealizedGainLoss">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div><p>Amount of unrealized gain (loss) on investment in marketable security.</p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 220<br> -SubTopic 10<br> -Section S99<br> -Paragraph 2<br> -Subparagraph (SX 210.5-03(7)(c))<br> -URI http://asc.fasb.org/extlink&amp;oid=115205541&amp;loc=SL114868664-224227<br></p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_MarketableSecuritiesUnrealizedGainLoss</td>
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<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>us-gaap_</td>
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<td>xbrli:monetaryItemType</td>
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<td><strong> Balance Type:</strong></td>
<td>credit</td>
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<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
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<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_RealizedGainLossOnMarketableSecuritiesCostMethodInvestmentsAndOtherInvestments">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div><p>This item represents the total realized gain (loss) included in earnings for the period as a result of selling marketable securities categorized as trading, available-for-sale, or held-to-maturity and any gains or losses realized during the period from the sale of investments accounted for under the cost method of accounting and/or investments that are separately or otherwise not categorized as trading, available-for-sale, or held-to-maturity. Additionally, this item would include any losses recognized for other than temporary impairments (OTTI) of the subject investments in debt and equity securities.</p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;"><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_RealizedGainLossOnMarketableSecuritiesCostMethodInvestmentsAndOtherInvestments</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>us-gaap_</td>
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<td><strong> Balance Type:</strong></td>
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<td><strong> Period Type:</strong></td>
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<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_StockRepurchaseProgramNumberOfSharesAuthorizedToBeRepurchased">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div><p>The number of shares authorized to be repurchased by an entity's Board of Directors under a stock repurchase plan.</p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;"><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_StockRepurchaseProgramNumberOfSharesAuthorizedToBeRepurchased</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>us-gaap_</td>
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<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:sharesItemType</td>
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<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
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<tr>
<td><strong> Period Type:</strong></td>
<td>instant</td>
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<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_StockRepurchasedDuringPeriodShares">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div><p>Number of shares that have been repurchased during the period and have not been retired and are not held in treasury. Some state laws may govern the circumstances under which an entity may acquire its own stock and prescribe the accounting treatment therefore. This element is used when state law does not recognize treasury stock.</p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 505<br> -SubTopic 10<br> -Section 50<br> -Paragraph 2<br> -URI http://asc.fasb.org/extlink&amp;oid=109259400&amp;loc=d3e21463-112644<br><br>Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 210<br> -SubTopic 10<br> -Section S99<br> -Paragraph 1<br> -Subparagraph (SX 210.5-02(29))<br> -URI http://asc.fasb.org/extlink&amp;oid=6877327&amp;loc=d3e13212-122682<br><br>Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 505<br> -SubTopic 10<br> -Section S99<br> -Paragraph 1<br> -Subparagraph (SX 210.3-04)<br> -URI http://asc.fasb.org/extlink&amp;oid=27012166&amp;loc=d3e187085-122770<br><br>Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 210<br> -SubTopic 10<br> -Section S99<br> -Paragraph 1<br> -Subparagraph (SX 210.5-02(28))<br> -URI http://asc.fasb.org/extlink&amp;oid=6877327&amp;loc=d3e13212-122682<br></p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_StockRepurchasedDuringPeriodShares</td>
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<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>us-gaap_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:sharesItemType</td>
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<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
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<tr>
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<td>duration</td>
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<span style="display: none;">v3.8.0.1</span><table class="report" border="0" cellspacing="2" id="idp6623749328">
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<th class="tl" colspan="1" rowspan="1"><div style="width: 200px;"><strong>Subsequent Event (Details Narrative)<br> $ in Thousands</strong></div></th>
<th class="th">
<div>Apr. 27, 2018 </div>
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<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- References</a><div><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
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<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- References</a><div><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
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/**
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<DESCRIPTION>IDEA: XBRL DOCUMENT
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end
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
