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Commitments and Contigencies (Details Textual)
ozt in Millions
3 Months Ended 9 Months Ended 36 Months Ended
Jan. 01, 2027
Oct. 02, 2014
USD ($)
Sep. 30, 2024
USD ($)
shares
Sep. 30, 2023
USD ($)
Sep. 30, 2024
USD ($)
shares
Sep. 30, 2023
USD ($)
Dec. 31, 2026
Mar. 28, 2025
USD ($)
Jun. 30, 2024
USD ($)
Apr. 03, 2024
shares
Apr. 02, 2024
USD ($)
Mar. 28, 2024
ozt
shares
Feb. 26, 2024
shares
Dec. 31, 2023
USD ($)
shares
Jun. 30, 2023
USD ($)
Dec. 31, 2022
USD ($)
Business Acquisition [Line Items]                                
Valued-added Tax Outstanding     $ 26,900,000   $ 26,900,000                      
Revenue Recognized     $ 130,000 $ 143,000 $ 55,407,000 $ 25,358,000                    
Common stock, shares issued (in shares) | shares     399,287,506   399,287,506               7,704,725 386,282,957    
Common stock fair value     $ 3,993,000   $ 3,993,000                 $ 3,863,000    
Surety Bonds Outstanding     349,500,000   349,500,000                 324,800,000    
Kensington Royalty Matter | Settled Litigation                                
Business Acquisition [Line Items]                                
Royalty payment | ozt                       2        
Common stock, shares issued (in shares) | shares                   737,210            
Common stock fair value                     $ 3,000,000          
Kensington Royalty Matter | Settled Litigation | Forecast                                
Business Acquisition [Line Items]                                
Royalty payment rate 1.50%           1.25%                  
Common stock fair value               $ 3,750,000                
Maximum | Kensington Royalty Matter | Settled Litigation                                
Business Acquisition [Line Items]                                
Common stock, shares issued (in shares) | shares                       2,455,000        
Palmarejo gold production royalty                                
Business Acquisition [Line Items]                                
Production to be sold, percent   50.00%                            
Price per ounce under agreement   $ 800                            
Aggregate deposit to be received   $ 22,000,000.0                            
Franco-Nevada Gold Stream Agreement                                
Business Acquisition [Line Items]                                
Production to be sold, percent   50.00%                            
Total consideration   $ 78,000,000                            
Payments to acquire businesses, gross   75,000,000                            
Common shares issued (value)   $ 3,000,000                            
Kensington                                
Business Acquisition [Line Items]                                
Revenue Recognized     (43,030,000) (31,000,000) (140,035,000) (56,000,000)                    
Revenue liability     55,080,000 44,323,000 55,080,000 44,323,000     $ 43,282,000         $ 55,082,000 $ 45,012,000 $ 25,016,000
Kensington | December 2023 Prepayment                                
Business Acquisition [Line Items]                                
Revenue liability     25,000,000   25,000,000                      
Rochester | September 2023 Prepayment                                
Business Acquisition [Line Items]                                
Revenue liability       17,500,000   17,500,000                    
Rochester | June 2024 Prepayment                                
Business Acquisition [Line Items]                                
Revenue liability     17,500,000   17,500,000                      
Wharf | September 2023 Prepayment                                
Business Acquisition [Line Items]                                
Revenue liability       $ 12,500,000   $ 12,500,000                    
Wharf | June 2024 Prepayment                                
Business Acquisition [Line Items]                                
Revenue liability     $ 12,500,000   $ 12,500,000