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Note 6 - Fair Value Measurements and Fair Value of Financial Instruments - Assets Measured on a Nonrecurring Basis (Details) - Fair Value, Nonrecurring [Member] - USD ($) $ in Thousands | Sep. 30, 2022 | Dec. 31, 2021
--- | --- | ---
Commercial Portfolio Segment [Member] |  |
Collateral dependent loans | $ 14,443 | $ 13,399
Commercial Portfolio Segment [Member] | Fair Value, Inputs, Level 1 [Member] |  |
Collateral dependent loans | 0 | 0
Commercial Portfolio Segment [Member] | Fair Value, Inputs, Level 2 [Member] |  |
Collateral dependent loans | 0 | 0
Commercial Portfolio Segment [Member] | Fair Value, Inputs, Level 3 [Member] |  |
Collateral dependent loans | 14,443 | 13,399
Commercial Real Estate Portfolio Segment [Member] |  |
Collateral dependent loans | 26,197 | 20,185
Commercial Real Estate Portfolio Segment [Member] | Fair Value, Inputs, Level 1 [Member] |  |
Collateral dependent loans | 0 | 0
Commercial Real Estate Portfolio Segment [Member] | Fair Value, Inputs, Level 2 [Member] |  |
Collateral dependent loans | 0 | 0
Commercial Real Estate Portfolio Segment [Member] | Fair Value, Inputs, Level 3 [Member] |  |
Collateral dependent loans | 26,197 | 20,185
Residential Portfolio Segment [Member] |  |
Collateral dependent loans | 1,372 | 2,794
Residential Portfolio Segment [Member] | Fair Value, Inputs, Level 1 [Member] |  |
Collateral dependent loans | 0 | 0
Residential Portfolio Segment [Member] | Fair Value, Inputs, Level 2 [Member] |  |
Collateral dependent loans | 0 | 0
Residential Portfolio Segment [Member] | Fair Value, Inputs, Level 3 [Member] |  |
Collateral dependent loans | $ 1,372 | $ 2,794

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