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Income Taxes - Summary of Movement in Deferred Tax Liability (Detail) - CAD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2023 | Dec. 31, 2022
Changes in deferred tax liability (asset) [abstract] |  |
Opening balance | $ 867 | $ 2,536
Recognized in income tax expense (recovery) | 657 | (996)
Recognized in OCI/equity | (449) | (673)
Disposal due to deconsolidation of IsoEnergy | (1,075) | 0
Net deferred tax liability | $ 0 | $ 867

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