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Additional information on the consolidated statements of income (loss) - Disclosure of expenses by nature (Details) - CAD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Additional Information On Consolidated Statements Of Income (Loss) [Abstract]    
Impairment of assets $ 124,538 $ 26,300
Depletion and depreciation 51,934 46,904
Employee benefit expenses 28,586 20,142
Professional fees 15,454 7,631
Insurance costs 3,634 1,820
Material, supplies and consumables 3,560 0
Communication and promotional expenses 977 1,265
Rent and office expenses 1,654 1,052
Public company expenses 1,234 971
Travel expenses 815 413
Cost recoveries (582) (618)
Deemed listing fees of Osisko Development 0 1,751
Other expenses 644 596
Expenses, by nature $ 232,448 $ 108,227