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Reclamation and Remediation - Narrative (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2023
Sep. 30, 2024
Dec. 31, 2022
Decrease in estimated liability $ 1,200    
Asset retirement obligation 9,562 $ 8,759 $ 8,417
Reclamation and remediation liabilities 11,795 10,681  
Reclamation liabilities 2,233 $ 1,922 $ 1,949
Reclamation and remediation discount rate   8.00%  
Don David Gold Mine      
Asset retirement obligation 9,600 $ 8,800  
Reclamation liabilities $ 2,200 $ 1,900