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Note 4 - Income and Mining Taxes - Major Components of Income Tax Provision (Benefit) (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended | 9 Months Ended | 12 Months Ended
--- | --- | --- | --- | ---
Sep. 30, 2021 | Jun. 30, 2021 | Mar. 31, 2021 | Sep. 30, 2020 | Jun. 30, 2020 | Mar. 31, 2020 | Jun. 30, 2021 | Jun. 30, 2020 | Sep. 30, 2021 | Sep. 30, 2020 | Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Domestic | $ (2,176) |  |  | $ (705) |  |  |  |  | $ (7,489) | $ 1,690 |  |  |
Foreign | (1,578) |  |  | (2,286) |  |  |  |  | (4,690) | (6,005) |  |  |
Total current income and mining tax provision | (3,754) |  |  | (2,991) |  |  |  |  | (12,179) | (7,695) |  |  |
Domestic | 3,213 |  |  | (2,761) |  |  |  |  | 8,226 | (1,108) |  |  |
Foreign | 5,074 |  |  | 571 |  |  |  |  | 7,877 | 1,380 |  |  |
Total deferred income and mining tax benefit | 8,287 |  |  | (2,190) |  |  |  |  | 16,103 | 272 |  |  |
Total income and mining tax benefit (provision) | $ 4,533 | $ 4,134 | $ (4,743) | $ (5,181) | $ (2,646) | $ 405 | $ (609) | $ (2,242) | $ 3,924 | $ (7,423) | $ (8,199) | $ 18,318 | $ 2,445

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