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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, 2020
Dec. 31, 2019
Major components of tax expense (income) [abstract]    
Expected income tax recovery $ (914) $ (3,844)
Effect of lower tax rates in foreign jurisdictions 31 942
Permanent differences 876 898
Change in unrecognized deductible temporary differences and other 2,552 1,191
Foreign exchange 74 398
Total $ 2,619 $ (415)