Assets Held for Sale and Discontinued Operations (Details) - USD ($)	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023
Carrying amounts of major classes of assets included as part of discontinued operations
Total current assets held for sale		$ 830,000
Carrying amounts of major classes of liabilities included as part of discontinued operations
Total current liabilities held for sale	$ 1,970,000	400,000
Asset retirement and reclamation liabilities	3,281,000	4,096,000
Current portion of ARO	150,000	150,000
Held for sale
Major classes of line items constituting pretax profit of discontinued operations
Total revenue	1,440,000	12,002,000
Cost of metals sold	(6,382,000)	(12,358,000)
Exploration	(657,000)	(2,258,000)
El Quevar project expenses	(429,000)	(544,000)
Velardea care and maintenance costs		(1,243,000)
Reclamation expense	(272,000)	(297,000)
Asset impairment expense	(561,000)
Other operating income, net	380,000	2,296,000
Gain on sale of assets held for sale	3,564,000
Depreciation and amortization	(122,000)	(528,000)
Total costs and expenses	(4,479,000)	(14,932,000)
Loss from discontinued operations	(3,039,000)	(2,930,000)
Litigation settlement		(250,000)
Total other expense		(250,000)
Loss from discontinued operations before income taxes	(3,039,000)	(3,180,000)
Income taxes		(11,000)
Loss from discontinued operations, net of taxes	(3,039,000)	(3,191,000)
Carrying amounts of major classes of assets included as part of discontinued operations
Inventories, net		830,000
Total current assets held for sale		830,000
Property, plant and equipment, net	667,000	5,798,000
Total assets held for sale	667,000	6,628,000
Carrying amounts of major classes of liabilities included as part of discontinued operations
Deferred revenue	1,820,000
Other current liabilities	150,000	400,000
Total current liabilities held for sale	1,970,000	400,000
Asset retirement and reclamation liabilities	3,281,000	4,096,000
Total liabilities held for sale	5,251,000	4,496,000
Current portion of ARO	150,000
Accrual litigation	$ 250,000
Velardena Properties | Held for sale
Carrying amounts of major classes of assets included as part of discontinued operations
Property, plant and equipment, net		3,000,000
Silex Argentina El Quevar mineral properties | Held for sale
Carrying amounts of major classes of assets included as part of discontinued operations
Property, plant and equipment, net		2,300,000
Other exploration and royalty properties		$ 500,000