v3.26.1
Note 4 -Business Segments, Sales of Products and Significant Customers - Schedule of Information About Reportable Segments (Parenthetical) (Details) - USD ($)
$ in Thousands
 3 Months Ended 12 Months Ended
Mar. 31, 2026
 [1]
Mar. 31, 2025
 [2]
Dec. 31, 2025
 [3]
Dec. 31, 2024
Dec. 31, 2023
Segment Reporting [Line Items]          
Other segment items $ 30,148 $ 21,276 $ 113,396 $ 59,422 [4],[5] $ 89,262 [4]
Lucky Friday [Member]          
Segment Reporting [Line Items]          
Other segment items       2,207 25,548
Keno Hill [Member]          
Segment Reporting [Line Items]          
Other segment items       $ 26,754 $ 29,793
[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 (income) 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 (income) expense, net.
[3] Other operating expense items include general and administrative, exploration and pre-development, care and maintenance costs, provision for closed operations and environmental matters, write-down of property, plant and equipment and other operating (income) expense, net.
[4] Other operating expense items include general and administrative, exploration and pre-development, care and maintenance 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, care and maintenance costs, provision for closed operations and environmental matters, write-down of property, plant and equipment and other operating (income) expense, net.