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REVENUE AND COST OF SALES (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2024
Mar. 31, 2023
REVENUE AND COST OF SALES    
Concentrate Sales $ 12,674 $ 9,992
Provisional Pricing Adjustments (281) (167)
Total Revenue $ 12,393 $ 9,825