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Note 2 - Business Segments and Sales of Products - Information About Reportable Segments (Details) - USD ($) $ in Thousands | 3 Months Ended |
--- | --- | ---
Mar. 31, 2025 | Mar. 31, 2024 | Dec. 31, 2024
Segment Reporting, Revenue Reconciling Item [Line Items] |  |  |  |  |  |
Total sales |  | $ 261,339 |  | $ 189,528 |  |
Salaries, wages and other benefits |  | 52,749 |  | 48,436 |  |
Contractors |  | 25,915 |  | 18,002 |  |
Materials And Consumables |  | 57,759 |  | 57,219 |  |
Product inventory change |  | (9,140) |  | (11,796) |  |
Other direct production costs |  | 21,667 |  | 20,471 |  |
Transfer to ramp-up and suspension costs | [1] |  |  | (10,871) |  |
Depreciation, depletion and amortization |  | 38,385 |  | 48,907 |  |
Gross profit |  | 74,004 |  | 19,160 |  |
Other operating expenses |  | 21,649 | [2] | 14,096 | [3] |
Income from operations |  | 52,355 |  | 5,064 |  |
Interest expense |  | (11,551) |  | (12,644) |  |
Fair value adjustments, net |  | 3,627 |  | (1,852) |  |
Net foreign exchange gain (loss) |  | (356) |  | 3,982 |  |
Other income |  | 942 |  | 1,512 |  |
Income (loss) before income and mining taxes |  | 45,017 |  | (3,938) |  |
Capital additions |  | 54,095 |  | 47,589 |  |
Identifiable assets |  | 3,023,557 |  |  |  | $ 2,981,060
MetalSales [Member] |  |  |  |  |  |
Segment Reporting, Revenue Reconciling Item [Line Items] |  |  |  |  |  |
Total sales |  | 254,251 |  | 185,081 |  |
EnvironmentalRemediationServices [Member] |  |  |  |  |  |
Segment Reporting, Revenue Reconciling Item [Line Items] |  |  |  |  |  |
Total sales |  | 7,088 |  | 4,447 |  |
IntersegmentSales [Member] |  |  |  |  |  |
Segment Reporting, Revenue Reconciling Item [Line Items] |  |  |  |  |  |
Total sales |  | 986 |  | 321 |  |
ReconciliationOfSales [Member] |  |  |  |  |  |
Segment Reporting, Revenue Reconciling Item [Line Items] |  |  |  |  |  |
Total sales |  | 262,325 |  | 189,849 |  |
EliminationOfIntersegmentSales [Member] |  |  |  |  |  |
Segment Reporting, Revenue Reconciling Item [Line Items] |  |  |  |  |  |
Total sales |  | (986) |  | (321) |  |
Greens Creek [Member] |  |  |  |  |  |
Segment Reporting, Revenue Reconciling Item [Line Items] |  |  |  |  |  |
Salaries, wages and other benefits |  | 18,253 |  | 17,307 |  |
Contractors |  | 905 |  | 1,649 |  |
Materials And Consumables |  | 25,665 |  | 26,453 |  |
Product inventory change |  | 901 |  | (2,196) |  |
Other direct production costs |  | 10,325 |  | 12,201 |  |
Transfer to ramp-up and suspension costs | [1] |  |  | 0 |  |
Depreciation, depletion and amortization |  | 13,589 |  | 14,443 |  |
Gross profit |  | 48,505 |  | 27,453 |  |
Capital additions |  | 10,759 |  | 8,827 |  |
Identifiable assets |  | 576,744 |  |  |  | 564,334
Greens Creek [Member] | MetalSales [Member] |  |  |  |  |  |
Segment Reporting, Revenue Reconciling Item [Line Items] |  |  |  |  |  |
Total sales |  | 118,143 |  | 97,310 |  |
Greens Creek [Member] | EnvironmentalRemediationServices [Member] |  |  |  |  |  |
Segment Reporting, Revenue Reconciling Item [Line Items] |  |  |  |  |  |
Total sales |  | 0 |  | 0 |  |
Greens Creek [Member] | IntersegmentSales [Member] |  |  |  |  |  |
Segment Reporting, Revenue Reconciling Item [Line Items] |  |  |  |  |  |
Total sales |  | 0 |  | 0 |  |
Greens Creek [Member] | ReconciliationOfSales [Member] |  |  |  |  |  |
Segment Reporting, Revenue Reconciling Item [Line Items] |  |  |  |  |  |
Total sales |  | 118,143 |  | 97,310 |  |
Greens Creek [Member] | EliminationOfIntersegmentSales [Member] |  |  |  |  |  |
Segment Reporting, Revenue Reconciling Item [Line Items] |  |  |  |  |  |
Total sales |  | 0 |  | 0 |  |
Lucky Friday [Member] |  |  |  |  |  |
Segment Reporting, Revenue Reconciling Item [Line Items] |  |  |  |  |  |
Salaries, wages and other benefits |  | 14,776 |  | 11,582 |  |
Contractors |  | 3,863 |  | 2,803 |  |
Materials And Consumables |  | 11,423 |  | 10,168 |  |
Product inventory change |  | 1,182 |  | (2,101) |  |
Other direct production costs |  | (620) |  | (645) |  |
Transfer to ramp-up and suspension costs | [1] |  |  | (2,200) |  |
Depreciation, depletion and amortization |  | 13,425 |  | 7,912 |  |
Gross profit |  | 19,145 |  | 7,821 |  |
Capital additions |  | 15,446 |  | 14,988 |  |
Identifiable assets |  | 598,453 |  |  |  | 587,945
Lucky Friday [Member] | MetalSales [Member] |  |  |  |  |  |
Segment Reporting, Revenue Reconciling Item [Line Items] |  |  |  |  |  |
Total sales |  | 63,194 |  | 35,340 |  |
Lucky Friday [Member] | EnvironmentalRemediationServices [Member] |  |  |  |  |  |
Segment Reporting, Revenue Reconciling Item [Line Items] |  |  |  |  |  |
Total sales |  | 0 |  | 0 |  |
Lucky Friday [Member] | IntersegmentSales [Member] |  |  |  |  |  |
Segment Reporting, Revenue Reconciling Item [Line Items] |  |  |  |  |  |
Total sales |  | 0 |  | 0 |  |
Lucky Friday [Member] | ReconciliationOfSales [Member] |  |  |  |  |  |
Segment Reporting, Revenue Reconciling Item [Line Items] |  |  |  |  |  |
Total sales |  | 63,194 |  | 35,340 |  |
Lucky Friday [Member] | EliminationOfIntersegmentSales [Member] |  |  |  |  |  |
Segment Reporting, Revenue Reconciling Item [Line Items] |  |  |  |  |  |
Total sales |  | 0 |  | 0 |  |
Keno Hill [Member] |  |  |  |  |  |
Segment Reporting, Revenue Reconciling Item [Line Items] |  |  |  |  |  |
Salaries, wages and other benefits |  | 6,472 |  | 6,736 |  |
Contractors |  | 3,551 |  | 4,738 |  |
Materials And Consumables |  | 5,994 |  | 7,586 |  |
Product inventory change |  | (7,962) |  | (5,760) |  |
Other direct production costs |  | 5,014 |  | 2,616 |  |
Transfer to ramp-up and suspension costs | [1] |  |  | (8,671) |  |
Depreciation, depletion and amortization |  | 2,802 |  | 3,601 |  |
Gross profit |  | 1,038 |  | 0 |  |
Capital additions |  | 10,436 |  | 10,346 |  |
Identifiable assets |  | 429,660 |  |  |  | 413,982
Keno Hill [Member] | MetalSales [Member] |  |  |  |  |  |
Segment Reporting, Revenue Reconciling Item [Line Items] |  |  |  |  |  |
Total sales |  | 16,909 |  | 10,846 |  |
Keno Hill [Member] | EnvironmentalRemediationServices [Member] |  |  |  |  |  |
Segment Reporting, Revenue Reconciling Item [Line Items] |  |  |  |  |  |
Total sales |  | 0 |  | 0 |  |
Keno Hill [Member] | IntersegmentSales [Member] |  |  |  |  |  |
Segment Reporting, Revenue Reconciling Item [Line Items] |  |  |  |  |  |
Total sales |  | 986 |  | 321 |  |
Keno Hill [Member] | ReconciliationOfSales [Member] |  |  |  |  |  |
Segment Reporting, Revenue Reconciling Item [Line Items] |  |  |  |  |  |
Total sales |  | 17,895 |  | 11,167 |  |
Keno Hill [Member] | EliminationOfIntersegmentSales [Member] |  |  |  |  |  |
Segment Reporting, Revenue Reconciling Item [Line Items] |  |  |  |  |  |
Total sales |  | (986) |  | (321) |  |
Casa Berardi [Member] |  |  |  |  |  |
Segment Reporting, Revenue Reconciling Item [Line Items] |  |  |  |  |  |
Salaries, wages and other benefits |  | 13,190 |  | 12,744 |  |
Contractors |  | 10,665 |  | 5,223 |  |
Materials And Consumables |  | 14,571 |  | 12,827 |  |
Product inventory change |  | (3,261) |  | (1,739) |  |
Other direct production costs |  | 6,948 |  | 6,255 |  |
Transfer to ramp-up and suspension costs | [1] |  |  | 0 |  |
Depreciation, depletion and amortization |  | 8,569 |  | 22,951 |  |
Gross profit |  | 5,323 |  | (16,676) |  |
Capital additions |  | 16,257 |  | 13,316 |  |
Identifiable assets |  | 695,463 |  |  |  | 687,080
Casa Berardi [Member] | MetalSales [Member] |  |  |  |  |  |
Segment Reporting, Revenue Reconciling Item [Line Items] |  |  |  |  |  |
Total sales |  | 56,005 |  | 41,585 |  |
Casa Berardi [Member] | EnvironmentalRemediationServices [Member] |  |  |  |  |  |
Segment Reporting, Revenue Reconciling Item [Line Items] |  |  |  |  |  |
Total sales |  | 0 |  | 0 |  |
Casa Berardi [Member] | IntersegmentSales [Member] |  |  |  |  |  |
Segment Reporting, Revenue Reconciling Item [Line Items] |  |  |  |  |  |
Total sales |  | 0 |  | 0 |  |
Casa Berardi [Member] | ReconciliationOfSales [Member] |  |  |  |  |  |
Segment Reporting, Revenue Reconciling Item [Line Items] |  |  |  |  |  |
Total sales |  | 56,005 |  | 41,585 |  |
Casa Berardi [Member] | EliminationOfIntersegmentSales [Member] |  |  |  |  |  |
Segment Reporting, Revenue Reconciling Item [Line Items] |  |  |  |  |  |
Total sales |  | 0 |  | 0 |  |
Other Operating Segment [Member] |  |  |  |  |  |
Segment Reporting, Revenue Reconciling Item [Line Items] |  |  |  |  |  |
Salaries, wages and other benefits |  | 58 |  | 67 |  |
Contractors |  | 6,931 |  | 3,589 |  |
Materials And Consumables |  | 106 |  | 185 |  |
Product inventory change |  | 0 |  | 0 |  |
Other direct production costs |  | 0 |  | 44 |  |
Transfer to ramp-up and suspension costs | [1] |  |  | 0 |  |
Depreciation, depletion and amortization |  | 0 |  | 0 |  |
Gross profit |  | (7) |  | 562 |  |
Capital additions |  | 1,197 |  | 112 |  |
Identifiable assets |  | 723,237 |  |  |  | $ 727,719
Other Operating Segment [Member] | MetalSales [Member] |  |  |  |  |  |
Segment Reporting, Revenue Reconciling Item [Line Items] |  |  |  |  |  |
Total sales |  | 0 |  | 0 |  |
Other Operating Segment [Member] | EnvironmentalRemediationServices [Member] |  |  |  |  |  |
Segment Reporting, Revenue Reconciling Item [Line Items] |  |  |  |  |  |
Total sales |  | 7,088 |  | 4,447 |  |
Other Operating Segment [Member] | IntersegmentSales [Member] |  |  |  |  |  |
Segment Reporting, Revenue Reconciling Item [Line Items] |  |  |  |  |  |
Total sales |  | 0 |  | 0 |  |
Other Operating Segment [Member] | ReconciliationOfSales [Member] |  |  |  |  |  |
Segment Reporting, Revenue Reconciling Item [Line Items] |  |  |  |  |  |
Total sales |  | 7,088 |  | 4,447 |  |
Other Operating Segment [Member] | EliminationOfIntersegmentSales [Member] |  |  |  |  |  |
Segment Reporting, Revenue Reconciling Item [Line Items] |  |  |  |  |  |
Total sales |  | $ 0 |  | $ 0 |  |
[1] | Total cost of sales in excess of sales value are transferred to ramp-up and suspension costs.
[2] | Other operating expense items include general and administrative, exploration and pre-development, provision for closed operations and environmental matters, ramp-up and suspension costs and other operating (income) expense, net.
[3] | Other operating expense items include general and administrative, exploration and pre-development, ramp-up and suspension costs, provision for closed operations and environmental matters, and other operating (income) expense, net.

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