Contingencies - Additional Information (Details) - USD ($)				3 Months Ended	12 Months Ended					171 Months Ended
	Mar. 18, 2025	Jul. 09, 2024	Feb. 14, 2023	Dec. 31, 2018	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2016	Dec. 31, 2025
Loss Contingencies [Line Items]
Other current liabilities					$ 33,346,000	$ 26,794,000				$ 33,346,000
Other liabilities					14,916,000	15,303,000				14,916,000
EPA Notice Letter [Member]
Loss Contingencies [Line Items]
Payments made							$ 1,900,000
New Idria Mercury Mine [Member]
Loss Contingencies [Line Items]
Financial assurance required to be provided to EPA to secure performance				$ 2,000,000
New Almaden Mine (Formerly Referred to as Guadalupe River Watershed) [Member] | Natural Resource Damage Claim [Member]
Loss Contingencies [Line Items]
Payments made							$ 100,000
Total reserve					4,400,000					4,400,000
Other current liabilities					300,000					300,000
Other liabilities					4,100,000					4,100,000
Expense recognized					0	$ 0		$ 0
Revised estimated project cost					$ 9,000,000
New Almaden Mine (Formerly Referred to as Guadalupe River Watershed) [Member] | Natural Resource Damage Claim [Member] | Minimum [Member]
Loss Contingencies [Line Items]
Original estimated project costs									$ 3,300,000
New Almaden Mine (Formerly Referred to as Guadalupe River Watershed) [Member] | Natural Resource Damage Claim [Member] | Maximum [Member]
Loss Contingencies [Line Items]
Original estimated project costs									$ 4,400,000
Spartan and Spartan Mat [Member] | Sales [Member] | Product Concentration Risk [Member] | Maximum [Member]
Loss Contingencies [Line Items]
Concentration risk percentage					1.00%
Scepter Company [Member] | Ms.McCartney [Member]
Loss Contingencies [Line Items]
Loss Contingency, Damages Sought, Value			$ 30,000
Scepter Company [Member] | Ryan Colvin [Member]
Loss Contingencies [Line Items]
Loss Contingency, Damages Sought, Value	$ 75,000
Signature Systems Group, LLC [Member] | Spartan and Spartan Mat [Member]
Loss Contingencies [Line Items]
Loss Contingency, Damages Sought, Value		$ 15,000,000
Pending Litigation [Member] | New Idria Mercury Mine [Member] | EPA Notice Letter [Member]
Loss Contingencies [Line Items]
Insurance recoveries										8,500,000
Loss contingency, Loss in period										27,600,000
Payments made										$ 17,000,000