Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Current assets:
Cash and cash equivalents	$ 605	$ 574
Short-term investments, at fair value	5,798	6,829
Investments in marketable equity securities, at fair value	1,620	1,039
SilverStream note receivable	0	268
Prepaid expenses and other	26	46
Total current assets	8,049	8,756
Mineral properties	15,628	15,617
Other assets	124	159
Total assets	23,801	24,532
Current liabilities:
Accounts payable	157	228
Paycheck Protection loan	10	0
Operating lease liability	7	41
Total current liabilities	174	269
Long-term liabilities
Asset retirement obligation - Lik	125	125
Operating lease liability	0	7
Total long-term liabilities	125	132
Shareholders' equity:
Preferred stock, $0.01 par value, authorized 10,000,000 shares (none issued and outstanding at December 31, 2020 and 2019)	0	0
Common stock, $0.01 par value, authorized, 100,000,000 shares (58,108,366 and 58,133,066, respectively, shares issued and outstanding at December 31, 2020 and 2019)	581	581
Additional paid-in capital	70,514	70,204
Accumulated deficit	(47,593)	(46,654)
Total shareholders' equity	23,502	24,131
Total liabilities and shareholders' equity	$ 23,801	$ 24,532

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