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Goodwill - Summary of Reconciliation of Changes in Goodwill (Details) - CAD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Disclosure Of Reconciliation Of Changes In Goodwill [Abstract]    
Beginning Balance $ 11,440  
Acquisitions through business combinations   $ 107,053
Disposition of Bridge Farm (note 5) (11,345)  
Foreign currency translation $ (95) 4,692
Impairment   (100,305)
Ending Balance   $ 11,440