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INVENTORIES (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2024
Dec. 31, 2023
Mar. 31, 2023
Inventories      
Material on leach pads $ 15,844 $ 11,963  
In-process inventory 4,963 4,067  
Stockpiles 2,805 5,939  
Precious metals 1,465 1,955  
Materials and supplies 6,608 6,120  
Inventories 31,685 30,044  
Less long-term portion (11,814) (10,100)  
Current portion 19,871 $ 19,944  
Black Fox Complex      
Inventories      
Current portion 800  
Black Fox Complex | Production costs applicable to sales      
Inventories      
Inventory write-down 600    
Black Fox Complex | Depreciation and depletion      
Inventories      
Inventory write-down $ 200