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Income Taxes -Summary of Unrecognized Deductible Temporary Differences (Details) - CAD ($)
$ in Thousands
Dec. 31, 2020
Dec. 31, 2019
Disclosure Of Temporary Difference Unused Tax Losses And Unused Tax Credits [Abstract]    
Property, plant and equipment $ 36,782  
Intangible assets 536  
Share issue costs 11,112 $ 16,779
Financial obligations and other 1,054 1,726
Inventory and biological assets 34,781  
Non-capital losses 171,205 54,472
Unrecognized deductible temporary differences $ 255,470 $ 72,977