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Note 7 - Income and Mining Taxes - Schedule of Effective Income Tax Reconciliation (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Income Tax Disclosure [Abstract] |  |  |
Computed "statutory" benefit (provision), Amount | $ 17,429 | $ 9,432 | $ (1,161)
Computed “statutory” benefit (provision), Percentage | 21.00% | 21.00% | 21.00%
Percentage depletion, Amount | $ 4,205 | $ 8,542 | $ 8,076
Percentage depletion, Percentage | 5.00% | 19.00% | (146.00%)
Change in valuation allowance, Amount | $ (20,016) | $ (8,113) | $ 38,058
Change in valuation allowance, Percentage | (24.00%) | (18.00%) | (689.00%)
State taxes, net of federal tax benefit, Amount | $ (2,731) | $ (158) | $ 965
State taxes, net of federal tax benefit, Percentage | (3.00%) | 0.00% | (17.00%)
Foreign currency remeasurement of monetary assets and liabilities, Amount | $ (4,155) | $ 4,559 | $ (3,625)
Foreign currency remeasurement of monetary assets and liabilities, Percentage | (5.00%) | 10.00% | 66.00%
Rate differential on foreign earnings, Amount | $ 6,553 | $ 1,515 | $ 2,445
Rate differential on foreign earnings, Percentage | 8.00% | 3.00% | (44.00%)
Compensation, Amount | $ (1,636) | $ 173 | $ 1,094
Compensation, Percentage | (2.00%) | 0.00% | (20.00%)
Mining and other taxes, Amount | $ (1,359) | $ (6,609) | $ (13,799)
Mining and other taxes, Percentage | (2.00%) | (15.00%) | 250.00%
Other, Amount | $ 488 | $ (1,775) | $ (2,484)
Other, Percentage | 1.00% | (3.00%) | 45.00%
Total benefit (provision), Amount | $ (1,222) | $ 7,566 | $ 29,569
Total benefit (provision), Percentage | (1.00%) | 17.00% | (535.00%)

X
- Definition Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to mining and other taxes. + References No definition available. + Details
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