COMMITMENTS AND CONTINGENCIES - Reclamation Bonds and Surety Bonds (Details) - Surety Bonds $ in Millions, $ in Millions	9 Months Ended
	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