Note 10 - Derivative Instruments - Schedule of the Quantities of Metals Committed (Details) oz in Thousands	12 Months Ended
Dec. 31, 2025 oz
Derivative [Line Items]
Production Protected	9,672
Silver 2026 Settlements For Provisional Sales [Member]
Derivative [Line Items]
Production Protected	2,120
Silver 2026 Settlements For Forecasted Sales [Member]
Derivative [Line Items]
Production Protected	800
Gold 2026 Settlements For Forecasted Sales [Member]
Derivative [Line Items]
Production Protected	4

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.

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 815
-SubTopic 20
-Name Accounting Standards Codification
-Section 25
-Paragraph 6A
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480682/815-20-25-6A

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 815
-SubTopic 40
-Name Accounting Standards Codification
-Section 50
-Paragraph 5
-Subparagraph (f)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480237/815-40-50-5

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