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INCOME TAXES (Deductible Unused Tax Losses) (Details) - CANADA $ in Thousands | 12 Months Ended
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Dec. 31, 2017 USD ($)
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |
Non-capital loss carry-forwards | $ 111,212
Bottom of range [member] |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |
Expiry date non capital loss carryforwards | 2030
Top of range [member] |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |
Expiry date non capital loss carryforwards | 2036

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