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REVENUE AND COST OF SALES (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2024
Jun. 30, 2023
Jun. 30, 2024
Jun. 30, 2023
REVENUE AND COST OF SALES        
Concentrate Sales $ 14,346 $ 9,838 $ 27,020 $ 19,830
Provisional Pricing Adjustments 441 (620) 160 (787)
Total Revenue $ 14,787 $ 9,218 $ 27,180 $ 19,043