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REVENUE AND COST OF SALES (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2022
Jun. 30, 2021
Jun. 30, 2022
Jun. 30, 2021
Concentrate Sales $ 11,189 $ 0 $ 20,978 $ 0
Provisional Pricing Adjustments (1,819) 0 (558) 29
Total Revenue $ 9,370 $ 0 $ 20,420 $ 29