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Critical Accounting Judgments, Estimates and Assumptions (Details Narrative) - CAD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Disclosure Of Notes And Other Explanatory Information Explanatory Abstract      
Exploration and evaluation assets $ 38,633 $ 64,479  
Write-off exploration and evaluation assets $ 26,510