v3.25.3
Property, Plant, and Equipment and Assets Held-For-Sale, Net - Components of Property, Plant, and Equipment (Details) - USD ($)
$ in Thousands
Sep. 30, 2025
Dec. 31, 2024
Property, Plant and Equipment [Line Items]    
Property, plant and equipment, gross $ 88,368 $ 87,861
Less, accumulated depreciation and amortization (37,830) (36,273)
Total property, plant, and equipment, net 50,538 51,588
Assets held-for-sale 5,698 5,698
Total 56,236 57,286
Process equipment    
Property, Plant and Equipment [Line Items]    
Property, plant and equipment, gross 18,029 18,030
Production leach pads    
Property, Plant and Equipment [Line Items]    
Property, plant and equipment, gross $ 11,190 11,190
Buildings and leasehold improvements    
Property, Plant and Equipment [Line Items]    
Depreciation Life or Method 10 years  
Property, plant and equipment, gross $ 9,536 9,446
Test leach pads    
Property, Plant and Equipment [Line Items]    
Depreciation Life or Method 18 months  
Property, plant and equipment, gross $ 6,241 6,241
Mine equipment    
Property, Plant and Equipment [Line Items]    
Property, plant and equipment, gross 5,143 5,050
Vehicles    
Property, Plant and Equipment [Line Items]    
Property, plant and equipment, gross $ 1,854 1,854
Furniture and office equipment    
Property, Plant and Equipment [Line Items]    
Depreciation Life or Method 7 years  
Property, plant and equipment, gross $ 1,141 713
Mineral properties    
Property, Plant and Equipment [Line Items]    
Property, plant and equipment, gross 50 50
Construction in progress and other    
Property, Plant and Equipment [Line Items]    
Property, plant and equipment, gross $ 35,184 $ 35,287
Minimum | Process equipment    
Property, Plant and Equipment [Line Items]    
Depreciation Life or Method 5 years  
Minimum | Mine equipment    
Property, Plant and Equipment [Line Items]    
Depreciation Life or Method 5 years  
Minimum | Vehicles    
Property, Plant and Equipment [Line Items]    
Depreciation Life or Method 3 years  
Maximum | Process equipment    
Property, Plant and Equipment [Line Items]    
Depreciation Life or Method 15 years  
Maximum | Mine equipment    
Property, Plant and Equipment [Line Items]    
Depreciation Life or Method 7 years  
Maximum | Vehicles    
Property, Plant and Equipment [Line Items]    
Depreciation Life or Method 5 years