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COMMITMENTS AND CONTINGENCIES - (Narrative) (Details) - USD ($) $ in Thousands | Sep. 30, 2023 | Dec. 31, 2022 | Dec. 31, 2021
--- | --- | --- | ---
Other Commitments [Line Items] |  |  |
Asset retirement obligation | $ 10,418 | $ 9,595 | $ 13,687
Mining Properties and Mineral Rights |  |  |
Other Commitments [Line Items] |  |  |
Renewal costs | 330 |  |
Canyon Project |  |  |
Other Commitments [Line Items] |  |  |
Loss contingency, estimate of possible loss | 17,520 | 21,040 |
Asset retirement obligation | $ 33,000 | $ 42,910 |

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