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Note 8 - Derivative Instruments - Summarize the Quantities of Metals Committed (Details) | Sep. 30, 2025 USD ($) Ounces
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2025 Settlements For Provisional Sales [Member] |
Derivatives, Fair Value [Line Items] |
Derivative, Number of Instruments Held, Total | Ounces | 25,000
2025 Settlements For forecasted Sales [Member] |
Derivatives, Fair Value [Line Items] |
Derivative, Number of Instruments Held, Total | Ounces | 1,300,000
2026 Settlements For forecasted Sales [Member] |
Derivatives, Fair Value [Line Items] |
Derivative, Number of Instruments Held, Total | Ounces | 690,000
Maximum [Member] | 2025 Settlements For Provisional Sales [Member] |
Derivatives, Fair Value [Line Items] |
Assets Needed for Immediate Settlement, Aggregate Fair Value | $ 45,500
Maximum [Member] | 2025 Settlements For forecasted Sales [Member] |
Derivatives, Fair Value [Line Items] |
Assets Needed for Immediate Settlement, Aggregate Fair Value | 53,820
Maximum [Member] | 2026 Settlements For forecasted Sales [Member] |
Derivatives, Fair Value [Line Items] |
Assets Needed for Immediate Settlement, Aggregate Fair Value | 40,080.00
Minimum [Member] | 2025 Settlements For Provisional Sales [Member] |
Derivatives, Fair Value [Line Items] |
Assets Needed for Immediate Settlement, Aggregate Fair Value | 39,000
Minimum [Member] | 2025 Settlements For forecasted Sales [Member] |
Derivatives, Fair Value [Line Items] |
Assets Needed for Immediate Settlement, Aggregate Fair Value | 33,130
Minimum [Member] | 2026 Settlements For forecasted Sales [Member] |
Derivatives, Fair Value [Line Items] |
Assets Needed for Immediate Settlement, Aggregate Fair Value | $ 30,000

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- Definition The aggregate fair value of assets needed to immediately settle the derivative instruments with credit-risk-related contingent features if the credit-risk-related contingent features were triggered at the end of the reporting period. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 815 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 4H -Subparagraph (f) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480434/815-10-50-4H + Details
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