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RELATED PARTY TRANSACTIONS - Expense and Payable (Details) - Entity Affiliated With Related Party - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Jun. 30, 2021 | Jun. 30, 2020 | Jun. 30, 2021 | Jun. 30, 2020 | Dec. 31, 2020
Lexam L.P. |  |  |  |  |
RELATED PARTY TRANSACTIONS |  |  |  |  |
Expense |  |  | $ 11 | $ 76 |
Related party outstanding accounts payable (receivable) | $ 64 |  | 64 |  | $ 72
REVlaw |  |  |  |  |
RELATED PARTY TRANSACTIONS |  |  |  |  |
Expense | 107 | $ 50 | 142 | $ 88 |
Related party outstanding accounts payable (receivable) | $ 379 |  | $ 379 |  | $ 90

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