Summary of Significant Accounting Policies (Details) - USD ($)	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022	Oct. 02, 2014
Business Combination [Line Items]
Drilling and Related Costs Capitalized	$ 21,000,000	$ 16,800,000
Certificates of Deposit, at Carrying Value	9,100,000	8,500,000
Inventory Write-down	0	3,235,000	$ 40,247,000
Certificates of Deposit, at Carrying Value	$ 9,100,000	8,500,000
Palmarejo gold production royalty
Business Combination [Line Items]
Aggregate deposit to be received					$ 22,000,000.0
Production to be sold, percent					50.00%
Price per ounce under agreement					$ 800
Building and Building Improvements | Minimum
Business Combination [Line Items]
Property, Plant and Equipment, Useful Life	7 years
Building and Building Improvements | Maximum
Business Combination [Line Items]
Property, Plant and Equipment, Useful Life	30 years
Machinery and Equipment | Minimum
Business Combination [Line Items]
Property, Plant and Equipment, Useful Life	3 years
Machinery and Equipment | Maximum
Business Combination [Line Items]
Property, Plant and Equipment, Useful Life	10 years
Kensington
Business Combination [Line Items]
Revenue liability	$ 0	$ 42,164,000	$ 55,082,000	$ 25,016,000