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Warrants - Disclosure of detailed information about warrants, activity (Details)
$ / shares in Units, $ in Thousands
 12 Months Ended
Dec. 31, 2019
CAD ($)
Warrant
$ / shares
shares
Dec. 31, 2018
CAD ($)
Warrant
$ / shares
shares
Warrants [Abstract]    
Number of warrants, outstanding, beginning of period | Warrant 11,195,500 11,195,500
Warrants outstanding, amount, beginning of period | $ $ 30,901 $ 30,901
Warrants outstanding, weighted average exercise price, beginning of period | $ / shares $ 27.61 $ 27.61
Number of warrants expired during period | shares (5,715,500) 0
Warrants expired, amount, during period | $ $ (12,829) $ 0
Warrants expired during the period, weighted average exercise price | $ / shares $ 19.08 $ 0
Number of warrants, outstanding, end of period | Warrant 5,480,000 11,195,500
Warrants outstanding, amount end of period | $ $ 18,072 $ 30,901
Warrants outstanding, weighted average exercise price, end of period | $ / shares $ 36.50 $ 27.61