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Note 1 - Basis of Preparation of Financial Statements (Details Textual) - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2026	Mar. 25, 2026
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Recognized loss	$ 2.4
Hecla Quebec Inc. [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Amount of consideration receivable	$ 5.2	$ 601.7

Amount before tax of income (loss) from a discontinued operation. Includes, but is not limited to, the income (loss) from operations during the phase-out period, gain (loss) on disposal, gain (loss) for reversal of write-down (write-down) to fair value, less cost to sell, and adjustments to a prior period gain (loss) on disposal.

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