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Note 11 - Derivative Financial Instruments - Schedule of Derivative Instruments (Details) - Interest Rate Swap [Member] - USD ($) | Sep. 30, 2025 | Dec. 31, 2024
--- | --- | ---
Notional amount fair value hedge | $ 89,700,000 | $ 65,700,000
Fair Value Hedging [Member] |  |
Notional amount fair value hedge | $ 100,000,000 | $ 100,000,000
Fixed pay rates | 4.35% | 4.35%
Variable SOFR receive rates | 4.24% | 4.49%
Remaining maturity (in years) (Year) | 9 months 18 days | 1 year 7 months 6 days
Fair value | $ (542,000) | $ (168,000)

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- Definition Period remaining until the derivative contract matures, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References No definition available. + Details
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