Property, Plant, and Equipment and Assets Held-For-Sale, Net - Components of Property, Plant, and Equipment (Details) - USD ($) $ in Thousands	Mar. 31, 2025	Dec. 31, 2024
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 88,093	$ 87,861
Less, accumulated depreciation and amortization	(36,815)	(36,273)
Total property, plant, and equipment, net	51,278	51,588
Assets held-for-sale	5,698	5,698
Total	56,976	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	$ 9,507	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	5,050	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	$ 973	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	$ 35,199	$ 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