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Assets Held for Sale and Discontinued Operations - Disposal group (Details)				1 Months Ended	3 Months Ended		6 Months Ended	9 Months Ended
	Nov. 15, 2024 USD ($)	Oct. 24, 2024 USD ($)	Aug. 28, 2024 USD ($)	Nov. 15, 2024 USD ($)	Sep. 30, 2024 USD ($)	Sep. 30, 2023 USD ($)	Jun. 30, 2024 USD ($)	Sep. 30, 2024 USD ($) item	Sep. 30, 2023 USD ($)	Sep. 27, 2024 USD ($)	Sep. 03, 2024 USD ($)	Aug. 30, 2024 USD ($)	Jul. 01, 2024 USD ($)
Assets Held for Sale and Discontinued Operations
Proceeds from sale of assets								$ 139,000	$ 44,000
Gain (loss) from discontinued operations, net of taxes (Note 3)					$ 750,000	$ (578,000)		(3,205,000)	$ (1,814,000)
Velardena Properties
Assets Held for Sale and Discontinued Operations
Aggregate purchase price					5,500,000			$ 5,500,000
Total number of agreement for sale of assets \| item								4
Velardena and Chicago Mines, the Sulfide Processing Plant
Assets Held for Sale and Discontinued Operations
Number of agreement for sale of assets completed \| item								3
Proceeds from sale of assets								$ 2,500,000
Oxide Plant and Water Well
Assets Held for Sale and Discontinued Operations
Aggregate purchase price													$ 3,000,000.0
Velardena Properties
Assets Held for Sale and Discontinued Operations
Proceeds from sale of assets							$ 373,000
Asset Impairment Charges							$ 411,000
Velardena Properties \| Subsequent Events
Assets Held for Sale and Discontinued Operations
Proceeds from sale of assets	$ 300,000			$ 300,000
Velardena Properties \| Oxide Plant and Water Well
Assets Held for Sale and Discontinued Operations
Includes of deferred revenue					1,000,000.0			1,000,000.0
Velardena Properties \| Oxide Plant and Water Well \| Sale, discontinued operations
Assets Held for Sale and Discontinued Operations
Includes of deferred revenue					1,000,000.0			1,000,000.0
Velardena Properties \| Oxide Plant and Water Well \| Subsequent Events \| Sale, discontinued operations
Assets Held for Sale and Discontinued Operations
Total purchase price	$ 3,000,000.0			$ 3,000,000.0
Silex Argentina Transaction \| Sale, discontinued operations
Assets Held for Sale and Discontinued Operations
Transaction pursuant to Butte would acquire shares												100.00%
Total purchase price										$ 500,000		$ 3,500,000
Non-refundable cash payment					500,000			$ 500,000		$ 500,000	$ 500,000
Gain (loss) from discontinued operations, net of taxes (Note 3)					$ 500,000
Silex Argentina Transaction \| Subsequent Events \| Sale, discontinued operations
Assets Held for Sale and Discontinued Operations
Total purchase price		$ 2,500,000
Proceeds from Divestiture of Businesses		$ 2,500,000
Minera Labri \| Sale, not discontinued operations
Assets Held for Sale and Discontinued Operations
Proceeds from Divestiture of Businesses			$ 445,000