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Convertible Notes - Summary of Senior Convertible Notes (Details) - CAD ($)
$ in Thousands
1 Months Ended 10 Months Ended 12 Months Ended
Jul. 31, 2019
Dec. 31, 2018
Dec. 31, 2019
Disclosure Of Detailed Information Of Convertible Notes [Line Items]      
Equity component of convertible notes   $ 3,232  
8% Senior Unsecured Convertible Notes      
Disclosure Of Detailed Information Of Convertible Notes [Line Items]      
Equity component of convertible notes $ 600   $ 93,192
Transaction costs     (2,819)
Fair value attributable to conversion feature     (40,494)
Balance attributable to debt portion upon issuance     49,879
Accretion of note obligation     1,223
Amortization of note issue costs     93
Accrued interest     1,903
Conversion to common shares     $ (53,098)