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SUPPLEMENTAL FINANCIAL INFORMATION (Details 5) - CAD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2020 | Dec. 31, 2019
Accretion Expense on Lease Liability |  |
SupplementalFinancialInformationDetails5LineItems [Line Items] |  |
Lease related amounts recognized in the income statement | $ (56) | $ (76)
Short-term Lease Expenses |  |
SupplementalFinancialInformationDetails5LineItems [Line Items] |  |
Lease related amounts recognized in the income statement | (2,287) | (5,146)
Non-short term Low-value Leases Expense |  |
SupplementalFinancialInformationDetails5LineItems [Line Items] |  |
Lease related amounts recognized in the income statement | (13) | (19)
Lease Related Expense Gross |  |
SupplementalFinancialInformationDetails5LineItems [Line Items] |  |
Lease related amounts recognized in the income statement | $ (2,356) | $ (5,241)

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