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Cost of Sales (Schedule of Cost of Sales) (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Disclosure of detailed information about property, plant and equipment [line items]    
Direct mining costs $ 198,141 $ 94,609
Salaries and benefits 34,773 16,586
Workers' Participation 7,647 7,459
Depletion and depreciation 121,077 43,778
Royalties 25,703 6,318
Impairment of inventories 7,035  
Impairment (recovery) of inventories   (5)
Cost of sales 394,376 168,745
Depletion and depreciation, right-of-use $ 6,300 $ 2,500