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Segmented Information - Additional Information (Details) - Customer Concentration Risk [member] - customer
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
100% of Concentrate and Silver and Gold Sales Revenue [member]    
Disclosure of operating segments [line items]    
Number of significant customers 26  
Sales Revenue [member]    
Disclosure of operating segments [line items]    
Number of significant customers 7 7
Customer A [member] | Sales Revenue [member]    
Disclosure of operating segments [line items]    
Concentration risk (percent) 19.00% 15.00%
Customer B [member] | Sales Revenue [member]    
Disclosure of operating segments [line items]    
Concentration risk (percent) 17.00% 15.00%
Customer C [member] | Sales Revenue [member]    
Disclosure of operating segments [line items]    
Concentration risk (percent) 12.00% 13.00%
Customer D [member] | Sales Revenue [member]    
Disclosure of operating segments [line items]    
Concentration risk (percent) 11.00% 13.00%
Customer E [member] | Sales Revenue [member]    
Disclosure of operating segments [line items]    
Concentration risk (percent) 7.00% 9.00%
Customer F [member] | Sales Revenue [member]    
Disclosure of operating segments [line items]    
Concentration risk (percent) 7.00% 8.00%
Customer G [member] | Sales Revenue [member]    
Disclosure of operating segments [line items]    
Concentration risk (percent) 5.00% 8.00%