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Note 11 - Derivative Financial Instruments (Details Textual) - Interest Rate Swap [Member]
 3 Months Ended 9 Months Ended
Sep. 30, 2025
USD ($)
Sep. 30, 2024
USD ($)
Sep. 30, 2025
USD ($)
Sep. 30, 2024
USD ($)
Dec. 31, 2024
USD ($)
Derivative, Notional Amount $ 89,700,000   $ 89,700,000   $ 65,700,000
Derivative Asset 1,100,000   1,100,000   3,800,000
Derivative Liability 1,100,000   1,100,000   3,800,000
Derivative, Gain (Loss) on Derivative, Net 0 $ 0 0 $ 0  
Fair Value Hedging [Member]          
Derivative, Notional Amount $ 100,000,000   $ 100,000,000   $ 100,000,000
Derivative, Number of Instruments Held 1   1   1
Derivative, Fair Value, Net $ (542,000)   $ (542,000)   $ (168,000)
Fair Value Hedging [Member] | Other Liabilities [Member]          
Derivative Asset, Subject to Master Netting Arrangement, Liability Offset 540,000   540,000   418,000
Fair Value Hedging [Member] | Other Assets [Member]          
Derivative Liability, Subject to Master Netting Arrangement, Asset Offset $ 2,000   $ 2,000   $ 250,000