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COMMITMENTS AND CONTINGENCIES - Reclamation Bonds and Surety Bonds (Details) - Surety Bonds $ in Millions, $ in Millions | 9 Months Ended
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Sep. 30, 2023 USD ($) | Sep. 30, 2023 CAD ($)
Reclamation Bonds |  |
Percentage of annual fees on surety bonds | 2.30% | 2.30%
Percentage of required deposit on value of surety bonds | 11.00% | 11.00%
Restricted cash | $ 4.2 |
Nevada |  |
Reclamation Bonds |  |
Surety bonding obligation | 27.8 |
Canada |  |
Reclamation Bonds |  |
Surety bonding obligation | $ 11.6 | $ 15.6

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