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REVENUE - Narrative (Details) - Concentrate Metal Sales Agreement oz in Thousands, lb in Thousands, $ in Millions |  | 3 Months Ended | 9 Months Ended
--- | --- | --- | ---
Sep. 30, 2023 oz lb $ / pound $ / Ounce | Sep. 30, 2023 USD ($) $ / pound $ / Ounce | Sep. 30, 2022 USD ($) | Sep. 30, 2023 USD ($) $ / pound $ / Ounce | Sep. 30, 2022 USD ($)
Disaggregation of Revenue [Line Items] |  |  |  |  |
Embedded derivative, increase (decrease) of value | $ |  | $ 0.3 | $ 1.3 | $ 11.9 | $ 2.6
Silver |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Notional ounce/pound | oz | 4,480 |  |  |  |
Average price per ounce/pound | $ / Ounce | 22.48 | 22.48 |  | 22.48 |
Zinc |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Notional ounce/pound | lb | 1,750 |  |  |  |
Average price per ounce/pound | $ / pound | 1.11 | 1.11 |  | 1.11 |
Lead |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Notional ounce/pound | lb | 20,020 |  |  |  |
Average price per ounce/pound | $ / pound | 0.98 | 0.98 |  | 0.98 |

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