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Related Party Transactions - Additional Information (Details) - CAD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Related Party Transactions      
Share-based compensation $ 0 $ 0 $ 713
Directors      
Related Party Transactions      
Share-based compensation     323
Other key management personnel      
Related Party Transactions      
Share-based compensation     $ 390