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CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) - USD ($)
$ in Thousands
 6 Months Ended
Jun. 30, 2022
Jun. 30, 2021
Operating activities:    
Net loss $ (2,205) $ (1,196)
Adjustments to reconcile net loss to net cash used in operating activities:    
Depreciation 16 12
Amortization of right of use lease asset 20 20
Unrealized loss on marketable equity securities 155 270
Unrealized loss on short-term investments 98 56
Employee stock option expense 26 72
(Loss) gain on sale of marketable equity securities 159 (19)
Other income 0 (10)
Loss on derivative instruments 3 33
Changes in operating assets and liabilities:    
Prepaid expenses and other assets 222 5
Accounts payable and other liabilities 234 27
Net cash used in operating activities (1,272) (730)
Investing activities:    
(Purchase) sale of short-term investments, net (881) 493
Purchase of mineral property (10) (201)
Purchase of other assets - net (49) (39)
Cash from sale of marketable equity securities 53 88
Sale of derivative instruments - net 0 8
Net cash (used in) provided by investing activities (887) 349
Financing activities:    
Issuance of common stock - net of acquisition costs 2,023 98
Stock options exercised for cash 20 83
Net cash provided by financing activities 2,043 181
Net decrease in cash and cash equivalents (116) (200)
Cash and cash equivalents, beginning of period 462 605
Cash and cash equivalents, end of period 346 405
Supplemental Cash Flow information:    
Accrued mineral property acquisition costs included in accounts payable 0 173
Accrued common stock acquisition costs included in accounts payable 0 65
Acquisition of right to use asset $ 0 $ 99