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INCOME TAXES (Details 5) - Canada - CAD ($) $ in Thousands | Dec. 31, 2020 | Dec. 31, 2019
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DisclosureOfIncomeTaxesLineItems [Line Items] |  |
Tax losses - gross | $ 220,039 | $ 192,197
Tax benefit at tax rate of 26% - 27% | 59,578 | 51,731
Set-off against deferred tax liabilities | (16,943) | (15,827)
Total tax loss assets not recognized | 42,635 | 35,904
Tax credits | 1,126 | 1,126
Total tax credit assets not recognized | $ 1,126 | $ 1,126

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