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Financial Instruments (Narrative) (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Financial Instruments |  |  |
Unrestricted cash | $ 7,313 | $ 10,309 | $ 3,259
Working capital Surplus | 7,713 | 10,554 | 428
Accumulated deficit | (149,054) | (131,841) | (156,749)
Gold incurred a loss | 17,219 | 24,905 | $ 16,790
Cash payments | 298 | 215 |
Recognized in prepaid expenses | $ 78 | $ 78 |

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