Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Current assets:
Cash and cash equivalents	$ 574	$ 117
Short-term investments, at fair value	6,829	10,223
Investments in marketable equity securities, at fair value	1,039	1,585
SilverStream note receivable	268	0
Prepaid expenses and other	46	211
Total current assets	8,756	12,136
Mineral properties	15,617	15,657
Other assets	159	110
Total assets	24,532	27,903
Current liabilities:
Accounts payable	228	688
Operating lease liability	41	0
Total current liabilities	269	688
Long-term liabilities
Asset retirement obligation - Lik	125	125
Operating lease liability	7	0
Total long-term liabilities	132	125
Shareholders' equity:
Preferred stock, $0.01 par value, authorized 10,000,000 shares (none issued and outstanding at December 31, 2019 and 2018)	0	0
Common stock, $0.01 par value, authorized, 100,000,000 shares (58,133,066 and 58,171,466, respectively, shares issued and outstanding at December 31, 2019 and 2018)	581	582
Additional paid-in capital	70,204	69,873
Accumulated deficit	(46,654)	(43,365)
Total shareholders' equity	24,131	27,090
Total liabilities and shareholders' equity	$ 24,532	$ 27,903

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.