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RELATED PARTY TRANSACTIONS - Expense and Payable (Details) - Entity Affiliated With Related Party [Member] - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Lexam LP [Member] |  |  |
RELATED PARTY TRANSACTIONS |  |  |
Expense | $ 78 | $ 99 | $ 133
Related party outstanding accounts payable (receivable) |  | 72 |
REVlaw |  |  |
RELATED PARTY TRANSACTIONS |  |  |
Expense | 347 | 158 | $ 188
Related party outstanding accounts payable (receivable) | $ 137 | $ 90 |

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