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CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Operating activities:    
Net loss $ (5,368) $ (3,754)
Adjustments to reconcile net loss to net cash used in operating activities:    
Unrealized gain on marketable equity securities (289) (83)
Unrealized gain on short-term investments 0 (56)
Gain on sale of marketable equity securities (54) 0
Loss (gain) on derivative instruments 29 (31)
Stock-based compensation expense 666 247
Depreciation 27 25
Amortization of right of use lease asset 42 41
Increase in asset retirement and reclamation liabilities 20 0
Changes in operating assets and liabilities:    
Prepaid expenses and other current assets 207 20
Accounts payable and other current liabilities (379) 328
Net cash used in operating activities (5,099) (3,263)
Investing activities:    
Sale (purchase) of short-term investments - net 3,913 4,429
Additions to mineral properties (55) 0
Sale of marketable equity securities 54 0
Sale of derivative instruments - net 38 31
Additions to other assets (12) (11)
Net cash (used by) provided by investing activities 3,938 (4,409)
Financing activities:    
Issuance of common stock from private placements - net of issuance costs 1,218 7,097
Issuance of common stock upon exercise of stock options 54 459
Net cash provided by financing activities 1,272 7,556
Net increase (decrease) in cash and cash equivalents 111 (116)
Cash, cash equivalents and restricted cash, beginning of year 200 316
Cash, cash equivalents and restricted cash, end of year 311 200
Issuance of shares of common stock for services 0 255
Recognition of operating lease liability and right of use asset $ 0 $ 87