Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Current assets:
Cash and cash equivalents	$ 1,404	$ 605
Short-term investments	4,835	5,798
Investments in marketable equity securities, at fair value	1,433	1,620
Prepaid expenses and other	24	26
Total current assets	7,696	8,049
Mineral properties	15,628	15,628
Other assets	205	124
Total assets	23,529	23,801
Current liabilities:
Accounts payable	137	157
Paycheck Protection Loan	0	10
Operating lease liability	38	7
Total current liabilities	175	174
Long-term liabilities:
Asset retirement obligation - Lik	125	125
Operating lease liability	62	0
Total long-term liabilities	187	125
Commitments and contingencies
Shareholders' equity:
Preferred stock, $0.01 par value, authorized 10,000,000 shares (none issued and outstanding at March 31, 2021 and December 31, 2020)	0	0
Common stock, $0.01 par value, authorized 100,000,000 shares (58,379,116 and 58,108,366 shares, respectively, issued and outstanding at March 31, 2021 and December 31, 2020)	584	581
Additional paid-in capital	70,704	70,514
Accumulated deficit	(48,121)	(47,593)
Total shareholders' equity	23,167	23,502
Total liabilities and shareholders' equity	$ 23,529	$ 23,801

Carrying value as of the balance sheet date of liabilities incurred (and for which invoices have typically been received) and payable to vendors for goods and services received that are used in an entity's business. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

Name:	us-gaap_AccountsPayableCurrent
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

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.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 65
-Paragraph 15
-Subparagraph (g)(2)
-URI http://asc.fasb.org/extlink&oid=121322162&loc=SL121327923-165333

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(30)(a)(1))
-URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682