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Assets Held-For-Sale (Details)
$ in Thousands
1 Months Ended 3 Months Ended 9 Months Ended
Aug. 31, 2022
USD ($)
Sep. 30, 2024
USD ($)
Dec. 31, 2023
USD ($)
Sep. 30, 2023
USD ($)
Sep. 30, 2024
USD ($)
Sep. 30, 2023
USD ($)
Jul. 31, 2024
USD ($)
mill
Jun. 04, 2024
USD ($)
May 31, 2024
USD ($)
Mar. 01, 2024
mill
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]                    
Assets held for sale   $ 4,383 $ 7,148   $ 4,383          
Gross proceeds from sale               $ 3,600    
Gain on forfeiture of non-refundable deposits   0   $ 0 1,550 $ 0        
SAG Mill and Ball Mill                    
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]                    
Assets held for sale $ 13,600                  
Ball Mill                    
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]                    
Number of mills to sell | mill             1      
Gross proceeds from sale             $ 4,000      
Gain on forfeiture of non-refundable deposits   700     700          
Number of assets terminated in purchase agreement | mill                   1
Ball Mill | Held-for-sale | Equipment not in use                    
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]                    
Reduction to equipment not-in-use   $ 2,800     2,800          
SAG Mill                    
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]                    
Number of assets terminated in purchase agreement | mill                   1
Equipment not in use                    
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]                    
Proceeds from sale of patents and intellectual property – Note 5 $ 1,600                  
SAG Mill, Ball Mill, Sub-Station Transformer                    
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]                    
Assets held for sale                 $ 2,000  
Gain on forfeiture of non-refundable deposits         $ 1,600          
Proceeds from sale of patents and intellectual property – Note 5     $ 1,600