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22. SUPPLEMENTAL FINANCIAL INFORMATION (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2017 | Dec. 31, 2016
DisclosureOfOperatingExpensesLineItems [Line Items] |  |
Cost of goods and services sold | $ (10,414) | $ (10,021)
Operating expenses | (10,616) | (10,622)
Operating Overheads: Mining, other development expense |  |
DisclosureOfOperatingExpensesLineItems [Line Items] |  |
Cost of goods and services sold | (813) | (689)
Operating Overheads: Milling, conversion expense |  |
DisclosureOfOperatingExpensesLineItems [Line Items] |  |
Cost of goods and services sold | (2,993) | (2,414)
Less absorption: Mineral properties |  |
DisclosureOfOperatingExpensesLineItems [Line Items] |  |
Cost of goods and services sold | 39 | 39
Cost of services |  |
DisclosureOfOperatingExpensesLineItems [Line Items] |  |
Cost of goods and services sold | (6,528) | (6,957)
Inventory-non cash adjustments |  |
DisclosureOfOperatingExpensesLineItems [Line Items] |  |
Cost of goods and services sold | (119) |
Cost of goods and services sold |  |
DisclosureOfOperatingExpensesLineItems [Line Items] |  |
Operating expenses | (10,414) | (10,021)
Reclamation asset amortization |  |
DisclosureOfOperatingExpensesLineItems [Line Items] |  |
Operating expenses | (146) | (140)
Reclamation liability adjustments |  |
DisclosureOfOperatingExpensesLineItems [Line Items] |  |
Operating expenses | $ (56) | $ (461)

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