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Income Tax - Summary of Reconciliation of Tax Expense (Detail) - CAD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Reconciliation of accounting profit multiplied by applicable tax rates [abstract]    
Loss before income taxes $ (68,528) $ (79,733)
Canadian statutory rate 23.50% 23.40%
Expected income tax provision $ (16,104) $ (18,658)
Change in unrecognized deferred tax asset 21,128 27,664
Exchange rate effects on tax basis 23,493 (2,223)
Impairment of goodwill 20,484 11,232
Earnings taxed in foreign jurisdictions 2,063 543
Amounts not deductible (taxable) for tax purposes 8,869 4,373
Impact of accounting for associates and joint ventures (579) (1,104)
Other 780 (617)
Income taxes $ 42,396 $ 21,210