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DEFERRED REVENUE (Details 1) - CAD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2018 | Dec. 31, 2017
DisclosureOfDeferredRevenueLineItems [Line Items] |  |
Deferred revenue, beginning | $ 38,652 | $ 0
Revenue earned during the period | 15,550 | 16,067
Deferred revenue, ending | 37,727 | 38,652
Deferred Revenue |  |
DisclosureOfDeferredRevenueLineItems [Line Items] |  |
Deferred revenue, beginning | 38,652 | 0
Proceeds of APG Arrangement, net: Upfront proceeds | 0 | 43,500
Less: toll milling cash receipts from July 1, 2016 to January 31, 2017 | 0 | (3,520)
Revenue earned during the period | (4,239) | (4,443)
Accretion | 3,314 | 3,115
Deferred revenue, ending | $ 37,727 | $ 38,652

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