Note 4 -Business Segments, Sales of Products and Significant Customers - Schedule of Sales Contributed by Each Segment (Details) - Revenue Benchmark [Member] - Customer Concentration Risk [Member]	12 Months Ended
Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Segment Reporting [Line Items]
Percentage of sales	100.00%	100.00%	100.00%
Greens Creek [Member]
Segment Reporting [Line Items]
Percentage of sales	57.60%	60.30%	71.60%
Lucky Friday [Member]
Segment Reporting [Line Items]
Percentage of sales	28.80%	29.00%	21.60%
Keno Hill [Member]
Segment Reporting [Line Items]
Percentage of sales	13.60%	10.70%	6.60%
Other [Member]
Segment Reporting [Line Items]
Percentage of sales	0.00%	0.00%	0.20%

For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

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+ Details