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COMMITMENTS AND CONTINGENCIES - Reclamation Bonds and Surety Bonds (Details) - Surety Bonds
$ in Millions, $ in Millions
6 Months Ended
Jun. 30, 2023
USD ($)
Jun. 30, 2023
CAD ($)
Reclamation Bonds    
Percentage of annual fees on surety bonds 2.30% 2.30%
Percentage of required deposit on value of surety bonds 10.00% 10.00%
Restricted cash $ 4.2  
Nevada    
Reclamation Bonds    
Surety bonding obligation 27.8  
Canada    
Reclamation Bonds    
Surety bonding obligation $ 11.7 $ 15.6