Note 4 -Business Segments, Sales of Products and Significant Customers - Schedule of Information About Reportable Segments (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024		Dec. 31, 2023		Dec. 31, 2022
Segment Reporting Information [Line Items]
Total consolidated sales	$ 929,925		$ 720,227		$ 718,905
Salaries, wages and other benefits	202,078		187,124		172,024
Contractors	86,927		58,107		75,966
Materials and consumables	218,320		184,634		171,896
Product inventory change	(8,941)		14,299		(17,927)
Other direct production costs	78,822		72,945		59,152
Transfer to ramp-up and suspension costs	(28,961)	[1]	(58,605)	[2]	(2,300)	[3]
Depreciation, depletion and amortization	183,470		148,774		143,938
Gross profit	198,210		112,949		116,156
Other segment items	91,934	[4]	157,623	[5]	128,594	[6]
Income (loss) from operations	106,276		(44,674)		(12,438)
Interest expense	(49,834)		(43,319)		(42,793)
Fair value adjustments, net	(2,204)		2,925		(4,723)
Foreign exchange gain (loss), net	7,552		(3,810)		7,211
Other income	4,426		5,883		7,829
Income (loss) before income and mining taxes	66,216		(82,995)		(44,914)
Capital additions	214,492		223,887		149,378
Identifiable assets	2,981,060		3,011,104		2,927,172
Metal Sales [Member]
Segment Reporting Information [Line Items]
Total consolidated sales	909,369		714,944		718,432
Environmental Remediation Services [Member]
Segment Reporting Information [Line Items]
Total consolidated sales	20,556		5,283		473
Intersegment Sales [Member]
Segment Reporting Information [Line Items]
Total consolidated sales	3,834		0		0
Reconciliation of Sales [Member]
Segment Reporting Information [Line Items]
Total consolidated sales	933,759		720,227		718,905
Elimination of Intersegment Sales [Member]
Segment Reporting Information [Line Items]
Total consolidated sales	(3,834)		0		0
Greens Creek [Member]
Segment Reporting Information [Line Items]
Salaries, wages and other benefits	69,990		68,183		64,142
Contractors	6,135		5,917		7,550
Materials and consumables	93,223		89,850		81,538
Product inventory change	5,858		4,266		(5,885)
Other direct production costs	39,471		37,684		36,462
Transfer to ramp-up and suspension costs	0	[1]	0	[2]	0	[3]
Depreciation, depletion and amortization	53,450		53,995		48,911
Gross profit	153,447		124,609		102,344
Capital additions	47,795		43,542		36,898
Identifiable assets	564,334		569,369		582,687
Greens Creek [Member] | Metal Sales [Member]
Segment Reporting Information [Line Items]
Total consolidated sales	421,574		384,504		335,062
Greens Creek [Member] | Environmental Remediation Services [Member]
Segment Reporting Information [Line Items]
Total consolidated sales	0		0		0
Greens Creek [Member] | Intersegment Sales [Member]
Segment Reporting Information [Line Items]
Total consolidated sales	0		0		0
Greens Creek [Member] | Reconciliation of Sales [Member]
Segment Reporting Information [Line Items]
Total consolidated sales	421,574		384,504		335,062
Greens Creek [Member] | Elimination of Intersegment Sales [Member]
Segment Reporting Information [Line Items]
Total consolidated sales	0
Lucky Friday [Member]
Segment Reporting Information [Line Items]
Salaries, wages and other benefits	52,879		43,142		42,155
Contractors	14,154		8,681		11,384
Materials and consumables	39,957		27,030		29,868
Product inventory change	(2,628)		8,014		(2,302)
Other direct production costs	1,281		(1,460)		1,789
Transfer to ramp-up and suspension costs	(2,207)	[1]	(25,548)	[2]	0	[3]
Depreciation, depletion and amortization	41,049		24,325		33,704
Gross profit	58,669		32,100		31,216
Capital additions	49,592		65,337		50,992
Identifiable assets	587,945		578,110		571,510
Lucky Friday [Member] | Metal Sales [Member]
Segment Reporting Information [Line Items]
Total consolidated sales	203,154		116,284		147,814
Lucky Friday [Member] | Environmental Remediation Services [Member]
Segment Reporting Information [Line Items]
Total consolidated sales	0		0		0
Lucky Friday [Member] | Intersegment Sales [Member]
Segment Reporting Information [Line Items]
Total consolidated sales	0		0		0
Lucky Friday [Member] | Reconciliation of Sales [Member]
Segment Reporting Information [Line Items]
Total consolidated sales	203,154		116,284		147,814
Lucky Friday [Member] | Elimination of Intersegment Sales [Member]
Segment Reporting Information [Line Items]
Total consolidated sales	0
Keno Hill [Member]
Segment Reporting Information [Line Items]
Salaries, wages and other benefits	29,658		21,569		863
Contractors	22,960		10,472		482
Materials and consumables	28,648		18,018		459
Product inventory change	(8,902)		(1,163)		(0)
Other direct production costs	13,216		12,138		496
Transfer to ramp-up and suspension costs	(26,754)	[1]	(29,793)	[2]	(2,300)	[3]
Depreciation, depletion and amortization	16,136		4,277		0
Gross profit	0		0		0
Capital additions	54,869		44,672		19,725
Identifiable assets	413,982		362,986		276,096
Keno Hill [Member] | Metal Sales [Member]
Segment Reporting Information [Line Items]
Total consolidated sales	74,962		35,518		0
Keno Hill [Member] | Environmental Remediation Services [Member]
Segment Reporting Information [Line Items]
Total consolidated sales	0		0		0
Keno Hill [Member] | Intersegment Sales [Member]
Segment Reporting Information [Line Items]
Total consolidated sales	3,834		0		0
Keno Hill [Member] | Reconciliation of Sales [Member]
Segment Reporting Information [Line Items]
Total consolidated sales	78,796		35,518		0
Keno Hill [Member] | Elimination of Intersegment Sales [Member]
Segment Reporting Information [Line Items]
Total consolidated sales	(3,834)
Casa Berardi [Member]
Segment Reporting Information [Line Items]
Salaries, wages and other benefits	49,345		51,201		58,678
Contractors	23,982		31,912		52,715
Materials and consumables	55,867		48,130		54,896
Product inventory change	(3,269)		2,913		(186)
Other direct production costs	24,854		23,376		21,833
Transfer to ramp-up and suspension costs	0	[1]	(2,228)	[2]	0	[3]
Depreciation, depletion and amortization	72,835		66,037		60,962
Gross profit	(13,935)		(43,663)		(13,762)
Capital additions	60,704		70,056		39,667
Identifiable assets	687,080		683,035		681,631
Casa Berardi [Member] | Metal Sales [Member]
Segment Reporting Information [Line Items]
Total consolidated sales	209,679		177,678		235,136
Casa Berardi [Member] | Environmental Remediation Services [Member]
Segment Reporting Information [Line Items]
Total consolidated sales	0		0		0
Casa Berardi [Member] | Intersegment Sales [Member]
Segment Reporting Information [Line Items]
Total consolidated sales	0		0		0
Casa Berardi [Member] | Reconciliation of Sales [Member]
Segment Reporting Information [Line Items]
Total consolidated sales	209,679		177,678		235,136
Casa Berardi [Member] | Elimination of Intersegment Sales [Member]
Segment Reporting Information [Line Items]
Total consolidated sales	0
Other Operating Segment [Member]
Segment Reporting Information [Line Items]
Salaries, wages and other benefits	206		3,029		6,186
Contractors	19,696		1,125		3,835
Materials and consumables	625		1,606		5,135
Product inventory change	0		269		(9,554)
Other direct production costs	0		1,207		(1,428)
Transfer to ramp-up and suspension costs	0	[1]	(1,036)	[2]	0	[3]
Depreciation, depletion and amortization	0		140		361
Gross profit	29		(97)		(3,642)
Capital additions	1,532		280		2,096
Identifiable assets	727,719		817,604		815,248
Other Operating Segment [Member] | Metal Sales [Member]
Segment Reporting Information [Line Items]
Total consolidated sales	0		960		420
Other Operating Segment [Member] | Environmental Remediation Services [Member]
Segment Reporting Information [Line Items]
Total consolidated sales	20,556		5,283		473
Other Operating Segment [Member] | Intersegment Sales [Member]
Segment Reporting Information [Line Items]
Total consolidated sales	0		0		0
Other Operating Segment [Member] | Reconciliation of Sales [Member]
Segment Reporting Information [Line Items]
Total consolidated sales	20,556		$ 6,243		$ 893
Other Operating Segment [Member] | Elimination of Intersegment Sales [Member]
Segment Reporting Information [Line Items]
Total consolidated sales	$ 0

[1] Total cost of sales in excess of sales value are transferred to ramp-up and suspension costs.

[2] Total cost of sales in excess of sales value are transferred to ramp-up and suspension costs.

[3] Total cost of sales in excess of sales value are transferred to ramp-up and suspension costs.

[4] Other operating expense items include general and administrative, exploration and pre-development, ramp-up and suspension costs, provision for closed operations and environmental matters, write-down of property, plant and equipment and other operating (income) expense, net.

[5] Other operating expense items include general and administrative, exploration and pre-development, ramp-up and suspension costs, provision for closed operations and environmental matters, write-down of property, plant and equipment and other operating (income) expense, net.

[6] Other operating expense items include general and administrative, exploration and pre-development, ramp-up and suspension costs, provision for closed operations and environmental matters, write-down of property, plant and equipment and other operating (income) expense, net.