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Note 2 - Business Segments and Sales of Products (Details Textual) $ in Millions | 3 Months Ended
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Mar. 31, 2024 USD ($) Segment | Mar. 31, 2023 USD ($)
Segment Reporting, Revenue Reconciling Item [Line Items] |  |
Number of Reportable Segments | Segment | 4 |
Lucky Friday [Member] |  |
Segment Reporting, Revenue Reconciling Item [Line Items] |  |
Business interruption insurance proceeds received | $ 17.4 |
Financially-settled Forward Contracts [Member] |  |
Segment Reporting, Revenue Reconciling Item [Line Items] |  |
Derivative, Gain (Loss) on Derivative, Net, Total | $ 3.1 | $ 0.9

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- Definition Proceeds from Business Interruption Insurance Policy + References No definition available. + Details
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- Definition Amount of increase (decrease) in the fair value of derivatives recognized in the income statement. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 815 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 4A -Subparagraph (b)(1) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480434/815-10-50-4A + Details
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- Definition Number of segments reported by the entity. A reportable segment is a component of an entity for which there is an accounting requirement to report separate financial information on that component in the entity's financial statements. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 280 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 18 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482810/280-10-50-18 + Details
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- Definition 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 No definition available. + Details
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- Details
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- Details
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Balance Type: |
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