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Production costs (Tables)
12 Months Ended
Dec. 31, 2021
Expenses by nature [abstract]  
Summary of Product Cost
December 31, 2021December 31, 2020
Labour$126,527 $116,653 
Fuel18,892 16,464 
Reagents42,473 53,399 
Electricity22,214 17,904 
Mining contractors46,403 38,240 
Operating and maintenance supplies and services77,033 78,062 
Site general and administrative costs53,358 46,588 
Royalties, production taxes and selling expenses62,848 77,873 
$449,748 $445,183