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GOODWILL (Details) $ in Thousands | 12 Months Ended |  |
--- | --- | --- | ---
Dec. 31, 2020 USD ($) $ / ounce $ / $ | Dec. 31, 2019 USD ($) | Dec. 31, 2016 USD ($)
Disclosure of reconciliation of changes in goodwill [line items] |  |  |
Goodwill | $ 49,786 | $ 49,786 |
Seabee |  |  |
Disclosure of reconciliation of changes in goodwill [line items] |  |  |
Goodwill |  |  | $ 49,800
Seabee |  |  |
Disclosure of reconciliation of changes in goodwill [line items] |  |  |
Commodity price applied to cash flow projections (in USD per ounce) | $ / ounce | 1,561 |  |
Foreign exchange rate applied to cash flow projections (in CAD per USD) | $ / $ | 1.31 |  |
Discount rate applied to cash flow projections | 4.50% |  |

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