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Leases - Summary of Amounts recognized in consolidated statements of net loss (Detail) - CAD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Presentation of leases for lessee [abstract]    
Expense relating to short-term leases $ 1,975 $ 2,305
Expense relating to variable lease payments $ 417 $ 384