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Revenue (Details) - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended
Sep. 30, 2025
Sep. 30, 2024
Sep. 30, 2025
Sep. 30, 2024
Disaggregation of Revenue [Line Items]        
Realized gain (loss) - embedded derivative, net $ 20 $ 344 $ 76 $ 1,333
Unrealized (loss) gain - embedded derivative, net 258 (398) 322 (240)
Total sales, net 24,878 13,272 48,460 52,756
Dore        
Disaggregation of Revenue [Line Items]        
Less: Treatment and refining charges (1)   (10) (6)
Total sales, net 134   1,257 19
Gold Dore        
Disaggregation of Revenue [Line Items]        
Total sales, net 126   1,213 24
Silver Dore        
Disaggregation of Revenue [Line Items]        
Total sales, net 9   54 1
Concentrate        
Disaggregation of Revenue [Line Items]        
Less: Treatment and refining charges (607) (1,394) (1,602) (4,410)
Total sales, net 24,466 13,326 46,805 51,644
Gold Concentrate        
Disaggregation of Revenue [Line Items]        
Total concentrate sales, net 4,858 3,416 9,166 17,173
Silver Concentrate        
Disaggregation of Revenue [Line Items]        
Total concentrate sales, net 17,271 5,424 29,825 17,332
Copper Concentrate        
Disaggregation of Revenue [Line Items]        
Total concentrate sales, net 659 917 1,545 5,099
Lead Concentrate        
Disaggregation of Revenue [Line Items]        
Total concentrate sales, net 417 918 1,481 3,342
Zinc Concentrate        
Disaggregation of Revenue [Line Items]        
Total concentrate sales, net 1,868 4,045 6,390 13,108
Co-products        
Disaggregation of Revenue [Line Items]        
Realized gain (loss) - embedded derivative, net $ 51 $ 200 $ 139 $ 500