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COMMITMENTS AND CONTINGENCIES - Flow-through Eligible Expenses (Details) - Timmins - USD ($)
$ in Millions
6 Months Ended
Mar. 02, 2022
Jun. 30, 2023
Flow through Eligible Expenses    
Other commitments    
Exploration expenditures   $ 9.9
Remaining CEE commitments   $ 5.2
Flow Through CEE    
Other commitments    
Gross proceeds $ 15.1