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UNAUDITED CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2021
Jun. 30, 2020
Jun. 30, 2021
Jun. 30, 2020
Cash flows from operating activities:        
Net loss     $ (3,852) $ (1,598)
Adjustments to reconcile net income/(loss) to net cash used in operations:        
Depreciation and amortization $ 12 $ 11 23 23
Stock-based compensation     584 592
Gain on disposal of mineral property (2,100) (2,568) (2,100) (2,568)
(Gain)/Loss on other investments (77) (1,099) (47) 30
Change in working capital account items:        
Other current assets     220 167
Accounts payable, accrued liabilities and other     384 88
Net cash used in operating activities     (4,788) (3,266)
Cash flows from investing activities:        
Proceeds from sales of marketable securities       954
Disposition of short-term investments, net     400 (34)
Additions to plant and equipment     (58)  
Proceeds from option/sale agreements, net     2,280 2,400
Net cash provided by investing activities     2,622 3,320
Cash flows from financing activities:        
Proceeds from equity financing, net     1,062 807
Payment of taxes from withheld shares     (396) (97)
Proceeds from exercise of stock options       37
Net cash provided by financing activities     666 747
Net increase/(decrease) in cash and cash equivalents     (1,500) 801
Cash and cash equivalents, beginning of period     7,762 1,408
Cash and cash equivalents, end of period $ 6,262 $ 2,209 $ 6,262 $ 2,209