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22. SUPPLEMENTAL FINANCIAL INFORMATION (Details 5) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2017 | Dec. 31, 2016
DisclosureOfNonCashWorkingCapitalLineItems [Line Items] |  |
Change in non-cash working capital items | $ (1,150) | $ 1,741
Trade and other receivables |  |
DisclosureOfNonCashWorkingCapitalLineItems [Line Items] |  |
Change in non-cash working capital items | (1,251) | 2,519
Inventory |  |
DisclosureOfNonCashWorkingCapitalLineItems [Line Items] |  |
Change in non-cash working capital items | (312) | (67)
Prepaid expenses and other assets |  |
DisclosureOfNonCashWorkingCapitalLineItems [Line Items] |  |
Change in non-cash working capital items | (82) | 13
Accounts payable and accrued liabilities |  |
DisclosureOfNonCashWorkingCapitalLineItems [Line Items] |  |
Change in non-cash working capital items | $ 495 | $ (724)

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