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Supplementary Cash Flow Information (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2022 | Sep. 30, 2021 | Sep. 30, 2022 | Sep. 30, 2021
Supplementary Cash Flow Information |  |  |  |
Unrealized loss (gain) on gold and silver rounds | $ 8 | $ 55 | $ (54) | $ 86
Unrealized foreign currency exchange loss | 678 | (59) | 1,200 | 257
Unrealized (gain) loss on zinc zero cost collar | (157) | 144 | (2,276) | 144
Other | 4 | (106) | (164) | (12)
Total other operating adjustments | $ 533 | $ 34 | $ (1,294) | $ 475

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