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INCOME TAXES (Details 5) - Canada - CAD ($) $ in Thousands | Dec. 31, 2018 | Dec. 31, 2017
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DisclosureOfIncomeTaxesLineItems [Line Items] |  |
Tax losses - gross | $ 158,437 | $ 147,046
Tax benefit at tax rate of 25% - 27% | 42,566 | 39,248
Set-off against deferred tax liabilities | (13,346) | (11,718)
Total tax loss assets not recognized | 29,220 | 27,530
Tax credits | 1,126 | 1,125
Total tax credit assets not recognized | $ 1,126 | $ 1,125

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