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INCOME TAXES - Disclosure of detailed information about effective income tax expense recovery (Details) - CAD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Major components of tax expense (income) [abstract]    
Expected income tax (recovery) $ (3,844) $ 15,777
Effect of lower tax rates in foreign jurisdictions 942 (22,238)
Permanent differences 898 1,332
Change in unrecognized deductible temporary differences and other 1,191 1,627
Foreign exchange 398 (181)
Income Tax Expense $ (415) $ (3,683)