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Income Tax - Additional Information (Detail) - CAD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023
Income Taxes [Line Items]
Deffered income tax recovery	$ (4,567)	$ (1,412)
Unused tax credits [member]
Income Taxes [Line Items]
Investment tax credits	427
Unused tax losses [member]
Income Taxes [Line Items]
Deffered income tax recovery	$ 506,213	$ 368,087

- Definition

The aggregate amount included in the determination of profit (loss) for the period in respect of current tax and deferred tax. [Refer: Current tax expense (income); Deferred tax expense (income)]

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