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Income Taxes - Deferred income tax assets not recognized (Details) - CAD ($) $ in Thousands | Dec. 31, 2024 | Dec. 31, 2023
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Disclosure of Deferred Income Tax Assets Not Recognized [Line Items] |  |
Deferred income tax assets not recognized | $ 143,825 | $ 119,356
Tax losses-capital |  |
Disclosure of Deferred Income Tax Assets Not Recognized [Line Items] |  |
Deferred income tax assets not recognized | 44,381 | 38,445
Tax losses-operating |  |
Disclosure of Deferred Income Tax Assets Not Recognized [Line Items] |  |
Deferred income tax assets not recognized | 86,494 | 69,919
Tax credits |  |
Disclosure of Deferred Income Tax Assets Not Recognized [Line Items] |  |
Deferred income tax assets not recognized | 2,500 | 1,126
Other deductible temporary differences |  |
Disclosure of Deferred Income Tax Assets Not Recognized [Line Items] |  |
Deferred income tax assets not recognized | 1,127 | 2,881
Property, plant and equipment, net |  |
Disclosure of Deferred Income Tax Assets Not Recognized [Line Items] |  |
Deferred income tax assets not recognized | $ 9,323 | $ 6,985

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