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Supplementary Cash Flow Information (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2022
Mar. 31, 2021
Supplementary Cash Flow Information    
Unrealized loss on gold and silver rounds $ (70) $ 66
Realized loss on gold and silver rounds 34  
Unrealized foreign currency exchange loss 445 241
Unrealized loss on zinc zero cost collar 2,509  
Other (367) 33
Total other operating adjustments $ 2,551 $ 340