v3.26.1
Note 2 - Business Segments and Sales of Products - Information About Reportable Segments (Details) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Dec. 31, 2025
Segment Reporting, Revenue Reconciling Item [Line Items]          
Total sales $ 333,851 $ 218,992 $ 745,284 $ 424,326  
Salaries, wages and other benefits 46,739 40,187 96,919 79,746  
Contractors 21,468 15,690 35,020 30,940  
Materials And Consumables 44,743 44,417 90,150 87,605  
Product inventory change (8,639) (7,742) (6,767) (13,621)  
Other direct production costs 12,972 9,848 26,371 24,567  
Depreciation, depletion and amortization 36,772 31,313 70,540 61,129  
Gross profit 179,796 85,279 433,051 153,960  
Other operating expenses 34,098 [1] 27,312 [2] 64,246 [3] 48,588 [4]  
Income from operations 145,698 57,967 368,805 105,372  
Interest expense (2,413) (10,948) (8,069) (22,340)  
Fair value adjustments, net (9,246) 4,450 (15,191) 7,838  
Net foreign exchange loss (4,445) (3,793) (3,947) (4,160)  
Other income 7,049 1,345 10,598 2,287  
Income before income and mining taxes 136,643 49,021 352,196 88,997  
Capital additions 39,142 42,676 78,407 80,514  
Identifiable assets 3,185,277   3,185,277   $ 3,560,645
Assets of discontinued operations 0   0   751,729
Total assets of reportable segments 3,185,277   3,185,277   2,808,916
Operating Segments [Member]          
Segment Reporting, Revenue Reconciling Item [Line Items]          
Salaries, wages and other benefits 46,628 40,049 96,630 79,550  
Contractors 10,817 9,271 19,729 17,590  
Materials And Consumables 45,254 44,349 90,567 87,431  
Product inventory change (8,639) (7,742) (6,767) (13,621)  
Other direct production costs 12,957 9,848 26,329 24,567  
Depreciation, depletion and amortization 36,772 31,313 70,540 61,129  
Gross profit 179,233 85,308 432,775 153,996  
Capital additions 35,987 41,384 74,143 78,025  
MetalSales [Member]          
Segment Reporting, Revenue Reconciling Item [Line Items]          
Total sales 323,022 212,396 729,803 410,642  
MetalSales [Member] | Operating Segments [Member]          
Segment Reporting, Revenue Reconciling Item [Line Items]          
Total sales 323,022 212,396 729,803 410,642  
EnvironmentalRemediationServices [Member]          
Segment Reporting, Revenue Reconciling Item [Line Items]          
Total sales 10,829 6,596 15,481 13,684  
EnvironmentalRemediationServices [Member] | Operating Segments [Member]          
Segment Reporting, Revenue Reconciling Item [Line Items]          
Total sales 0   0 0  
IntersegmentSales [Member]          
Segment Reporting, Revenue Reconciling Item [Line Items]          
Total sales 2,234 1,201 3,873 2,187  
IntersegmentSales [Member] | Operating Segments [Member]          
Segment Reporting, Revenue Reconciling Item [Line Items]          
Total sales 2,234 1,201 3,873 2,187  
ReconciliationOfSales [Member]          
Segment Reporting, Revenue Reconciling Item [Line Items]          
Total sales 336,085 220,193 749,157 426,513  
ReconciliationOfSales [Member] | Operating Segments [Member]          
Segment Reporting, Revenue Reconciling Item [Line Items]          
Total sales 325,256 213,597 733,676 412,829  
EliminationOfIntersegmentSales [Member]          
Segment Reporting, Revenue Reconciling Item [Line Items]          
Total sales (2,234) (1,201) (3,873) (2,187)  
EliminationOfIntersegmentSales [Member] | Operating Segments [Member]          
Segment Reporting, Revenue Reconciling Item [Line Items]          
Total sales (2,234) (1,201) (3,873) (2,187)  
Greens Creek [Member]          
Segment Reporting, Revenue Reconciling Item [Line Items]          
Salaries, wages and other benefits 19,224 18,281 39,806 36,534  
Contractors 2,717 1,557 5,422 2,462  
Materials And Consumables 26,722 25,400 54,317 51,065  
Product inventory change (9,606) (9,234) (4,223) (8,333)  
Other direct production costs 10,854 10,020 20,964 20,345  
Depreciation, depletion and amortization 14,314 12,897 30,297 26,486  
Gross profit 101,108 63,081 269,749 111,586  
Capital additions 12,070 8,397 18,183 19,156  
Identifiable assets 660,706   660,706   640,011
Greens Creek [Member] | MetalSales [Member]          
Segment Reporting, Revenue Reconciling Item [Line Items]          
Total sales 165,333 122,002 416,332 240,145  
Greens Creek [Member] | EnvironmentalRemediationServices [Member]          
Segment Reporting, Revenue Reconciling Item [Line Items]          
Total sales 0 0 0 0  
Greens Creek [Member] | IntersegmentSales [Member]          
Segment Reporting, Revenue Reconciling Item [Line Items]          
Total sales 0 0 0 0  
Greens Creek [Member] | ReconciliationOfSales [Member]          
Segment Reporting, Revenue Reconciling Item [Line Items]          
Total sales 165,333 122,002 416,332 240,145  
Greens Creek [Member] | EliminationOfIntersegmentSales [Member]          
Segment Reporting, Revenue Reconciling Item [Line Items]          
Total sales 0 0 0 0  
Lucky Friday [Member]          
Segment Reporting, Revenue Reconciling Item [Line Items]          
Salaries, wages and other benefits 18,665 14,559 39,188 29,335  
Contractors 4,082 3,828 8,038 7,691  
Materials And Consumables 10,575 10,899 21,020 22,322  
Product inventory change 1,457 (476) 1,164 706  
Other direct production costs 191 201 733 (419)  
Depreciation, depletion and amortization 16,951 13,275 30,560 26,700  
Gross profit 71,300 21,987 131,874 41,132  
Capital additions 16,681 15,942 33,699 31,388  
Identifiable assets 664,035   664,035   688,997
Lucky Friday [Member] | MetalSales [Member]          
Segment Reporting, Revenue Reconciling Item [Line Items]          
Total sales 123,221 64,273 232,577 127,467  
Lucky Friday [Member] | EnvironmentalRemediationServices [Member]          
Segment Reporting, Revenue Reconciling Item [Line Items]          
Total sales 0 0 0 0  
Lucky Friday [Member] | IntersegmentSales [Member]          
Segment Reporting, Revenue Reconciling Item [Line Items]          
Total sales 0 0 0 0  
Lucky Friday [Member] | ReconciliationOfSales [Member]          
Segment Reporting, Revenue Reconciling Item [Line Items]          
Total sales 123,221 64,273 232,577 127,467  
Lucky Friday [Member] | EliminationOfIntersegmentSales [Member]          
Segment Reporting, Revenue Reconciling Item [Line Items]          
Total sales 0 0 0 0  
Keno Hill [Member]          
Segment Reporting, Revenue Reconciling Item [Line Items]          
Salaries, wages and other benefits 8,739 7,209 17,636 13,681  
Contractors 4,018 3,886 6,269 7,437  
Materials And Consumables 7,957 8,050 15,230 14,044  
Product inventory change (490) 1,968 (3,708) (5,994)  
Other direct production costs 1,912 (373) 4,632 4,641  
Depreciation, depletion and amortization 5,507 5,141 9,683 7,943  
Gross profit 6,825 240 31,152 1,278  
Capital additions 7,236 17,045 22,261 27,481  
Identifiable assets 496,117   496,117   505,205
Keno Hill [Member] | MetalSales [Member]          
Segment Reporting, Revenue Reconciling Item [Line Items]          
Total sales 34,468 26,121 80,894 43,030  
Keno Hill [Member] | EnvironmentalRemediationServices [Member]          
Segment Reporting, Revenue Reconciling Item [Line Items]          
Total sales 0 0 0 0  
Keno Hill [Member] | IntersegmentSales [Member]          
Segment Reporting, Revenue Reconciling Item [Line Items]          
Total sales 2,234 1,201 3,873 2,187  
Keno Hill [Member] | ReconciliationOfSales [Member]          
Segment Reporting, Revenue Reconciling Item [Line Items]          
Total sales 36,702 27,322 84,767 45,217  
Keno Hill [Member] | EliminationOfIntersegmentSales [Member]          
Segment Reporting, Revenue Reconciling Item [Line Items]          
Total sales (2,234) (1,201) (3,873) (2,187)  
Other [Member]          
Segment Reporting, Revenue Reconciling Item [Line Items]          
Salaries, wages and other benefits 111 138 289 196  
Contractors 10,651 6,419 15,291 13,350  
Materials And Consumables (511) 68 (417) 174  
Product inventory change 0 0 0  
Other direct production costs 15 0 42  
Depreciation, depletion and amortization 0 0 0  
Gross profit (563) (29) 276 (36)  
Capital additions 3,155 1,292 4,264 2,489  
Identifiable assets 1,364,419   1,364,419   $ 974,703
Other [Member] | MetalSales [Member]          
Segment Reporting, Revenue Reconciling Item [Line Items]          
Total sales 0 0 0 0  
Other [Member] | EnvironmentalRemediationServices [Member]          
Segment Reporting, Revenue Reconciling Item [Line Items]          
Total sales 10,829   15,481 13,684  
Other [Member] | EnvironmentalRemediationServices [Member] | Operating Segments [Member]          
Segment Reporting, Revenue Reconciling Item [Line Items]          
Total sales   0      
Other [Member] | IntersegmentSales [Member]          
Segment Reporting, Revenue Reconciling Item [Line Items]          
Total sales 0 0 0  
Other [Member] | ReconciliationOfSales [Member]          
Segment Reporting, Revenue Reconciling Item [Line Items]          
Total sales 10,829 6,596 15,481 13,684  
Other [Member] | EliminationOfIntersegmentSales [Member]          
Segment Reporting, Revenue Reconciling Item [Line Items]          
Total sales $ 0 $ 0 $ 0 $ 0  
[1] Other operating expense items include general and administrative, exploration and pre-development, care and maintenance, provision for closed operations and environmental matters, and other operating expense, net.
[2] Other operating expense items include general and administrative, exploration and pre-development, care and maintenance, provision for closed operations and environmental matters, and other operating expense, net.
[3] Other operating expense items include general and administrative, exploration and pre-development, care and maintenance, provision for closed operations and environmental matters, and other operating expense, net.
[4] Other operating expense items include general and administrative, exploration and pre-development, care and maintenance, provision for closed operations and environmental matters, and other operating expense, net.