Note 13 - Sale of Hecla Quebec Inc. and Discontinued Operations - Statement of Discountinued Operation (Details) - USD ($) $ in Thousands		3 Months Ended	6 Months Ended
		Jun. 30, 2025	Jun. 30, 2026	Jun. 30, 2025
Discontinued Operation, Additional Disclosures [Abstract]
Discontinued Operation, Sales		$ 85,035	$ 70,284	$ 141,040
Discontinued Operation, Costs applicable to sales	[1]	44,944	37,629	87,057
Discontinued Operation, Depreciation, depletion and amortization		5,846	932	14,415
Discontinued Operation, Exploration and pre-development		72	1,051	260
Discontinued Operation, Other operating income, net		(1,616)	0	(1,431)
Discontinued Operation, Total costs and expenses		49,246	39,612	100,301
Discontinued Operation, Income from discontinued operations		35,789	30,672	40,739
Discontinued Operation of Other Expenses
Discontinued Operation, Interest expense		(151)	(91)	(310)
Discontinued Operation, Fair value adjustments, net		5,165	(2,231)	5,404
Discontinued Operation, Net foreign exchange loss		276	0	287
Disposal Group, Other income		166		166
Disposal Group, Including Discontinued Operation, Non operating other expense (income), Total		5,456	(2,322)	5,547
Discontinued Operation, Income of discontinued operations		41,245	28,350	46,286
Discontinued Operation, Loss on disposal of Hecla Quebec Inc.		0	(192,482)	0
Discontinued Operation, Income and mining tax provision		(10,450)	(19,549)	(10,958)
Discontinued Operation, Net income (loss) from discontinued operations, net of taxes		$ 30,795	$ (183,681)	$ 35,328

[1] (1) Excludes depreciation, depletion and amortization