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Note 7 - Fair Value Measurements and Fair Value of Financial Instruments - Significant Unobservable Inputs for Assets Measured on Nonrecurring Basis (Details) - Fair Value, Nonrecurring [Member] $ in Thousands | Mar. 31, 2025 USD ($) | Dec. 31, 2024 USD ($)
--- | --- | ---
Commercial Portfolio Segment [Member] |  |
Collateral dependent loans, fair value | $ 732 | $ 726
Commercial Real Estate Portfolio Segment [Member] |  |
Collateral dependent loans, fair value | 633 | 2,913
Fair Value, Inputs, Level 3 [Member] | Commercial Portfolio Segment [Member] |  |
Collateral dependent loans, fair value | 732 | 726
Fair Value, Inputs, Level 3 [Member] | Commercial Portfolio Segment [Member] | Valuation, Market Approach [Member] | Average Transfer Price as Price to Unpaid Principal Balance [Member] |  |
Collateral dependent loans, fair value | $ 732 | $ 726
Fair Value, Inputs, Level 3 [Member] | Commercial Portfolio Segment [Member] | Valuation, Market Approach [Member] | Average Transfer Price as Price to Unpaid Principal Balance [Member] | Minimum [Member] |  |
Collateral dependent loans, rate | (0.10) | (0.043)
Fair Value, Inputs, Level 3 [Member] | Commercial Portfolio Segment [Member] | Valuation, Market Approach [Member] | Average Transfer Price as Price to Unpaid Principal Balance [Member] | Maximum [Member] |  |
Collateral dependent loans, rate | 0.05 | (0.10)
Fair Value, Inputs, Level 3 [Member] | Commercial Portfolio Segment [Member] | Valuation, Market Approach [Member] | Average Transfer Price as Price to Unpaid Principal Balance [Member] | Weighted Average [Member] |  |
Collateral dependent loans, rate | (0.043) | 0.05
Fair Value, Inputs, Level 3 [Member] | Commercial Real Estate Portfolio Segment [Member] |  |
Collateral dependent loans, fair value | $ 633 | $ 2,913
Fair Value, Inputs, Level 3 [Member] | Commercial Real Estate Portfolio Segment [Member] | Appraisals of Collateral Value [Member] | Measurement Input, Comparability Adjustment [Member] |  |
Collateral dependent loans, fair value | $ 633 | $ 2,913
Fair Value, Inputs, Level 3 [Member] | Commercial Real Estate Portfolio Segment [Member] | Appraisals of Collateral Value [Member] | Measurement Input, Comparability Adjustment [Member] | Minimum [Member] |  |
Collateral dependent loans, rate | (0.10) | (0.143)
Fair Value, Inputs, Level 3 [Member] | Commercial Real Estate Portfolio Segment [Member] | Appraisals of Collateral Value [Member] | Measurement Input, Comparability Adjustment [Member] | Maximum [Member] |  |
Collateral dependent loans, rate | 0.05 | (0.40)
Fair Value, Inputs, Level 3 [Member] | Commercial Real Estate Portfolio Segment [Member] | Appraisals of Collateral Value [Member] | Measurement Input, Comparability Adjustment [Member] | Weighted Average [Member] |  |
Collateral dependent loans, rate | (0.0217) | 0

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