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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)