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Note 6 - 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 | Jun. 30, 2023 USD ($) | Dec. 31, 2022 USD ($)
--- | --- | ---
Commercial Portfolio Segment [Member] |  |
Collateral dependent loans, fair value | $ 10,779 | $ 14,550
Commercial Real Estate Portfolio Segment [Member] |  |
Collateral dependent loans, fair value | 10,376 | 17,264
Residential Portfolio Segment [Member] |  |
Collateral dependent loans, fair value | 1,319 | 1,392
Fair Value, Inputs, Level 3 [Member] | Commercial Portfolio Segment [Member] |  |
Collateral dependent loans, fair value | 10,779 | 14,550
Fair Value, Inputs, Level 3 [Member] | Commercial Portfolio Segment [Member] | Average Transfer Price as Price to Unpaid Principal Balance [Member] | Valuation, Market Approach [Member] |  |
Collateral dependent loans, fair value | $ 10,311 | $ 14,028
Fair Value, Inputs, Level 3 [Member] | Commercial Portfolio Segment [Member] | Average Transfer Price as Price to Unpaid Principal Balance [Member] | Valuation, Market Approach [Member] | Maximum [Member] |  |
Collateral dependent loans, rate | 92 | 96
Fair Value, Inputs, Level 3 [Member] | Commercial Portfolio Segment [Member] | Average Transfer Price as Price to Unpaid Principal Balance [Member] | Valuation, Market Approach [Member] | Weighted Average [Member] |  |
Collateral dependent loans, rate | 67 | 67
Fair Value, Inputs, Level 3 [Member] | Commercial Portfolio Segment [Member] | Average Transfer Price as Price to Unpaid Principal Balance [Member] | Valuation, Market Approach [Member] | Minimum [Member] |  |
Collateral dependent loans, rate | 65 | 65
Fair Value, Inputs, Level 3 [Member] | Commercial Portfolio Segment [Member] | Measurement Input, Comparability Adjustment [Member] | Appraisals of Collateral Value [Member] |  |
Collateral dependent loans, fair value | $ 468 | $ 522
Fair Value, Inputs, Level 3 [Member] | Commercial Portfolio Segment [Member] | Measurement Input, Comparability Adjustment [Member] | Appraisals of Collateral Value [Member] | Maximum [Member] |  |
Collateral dependent loans, rate | 13 | 13
Fair Value, Inputs, Level 3 [Member] | Commercial Portfolio Segment [Member] | Measurement Input, Comparability Adjustment [Member] | Appraisals of Collateral Value [Member] | Weighted Average [Member] |  |
Collateral dependent loans, rate | 3 | 3
Fair Value, Inputs, Level 3 [Member] | Commercial Portfolio Segment [Member] | Measurement Input, Comparability Adjustment [Member] | Appraisals of Collateral Value [Member] | Minimum [Member] |  |
Collateral dependent loans, rate | 10 | 10
Fair Value, Inputs, Level 3 [Member] | Commercial Real Estate Portfolio Segment [Member] |  |
Collateral dependent loans, fair value | $ 10,376 | $ 17,264
Fair Value, Inputs, Level 3 [Member] | Commercial Real Estate Portfolio Segment [Member] | Measurement Input, Comparability Adjustment [Member] | Appraisals of Collateral Value [Member] |  |
Collateral dependent loans, fair value | $ 10,376 | $ 17,264
Fair Value, Inputs, Level 3 [Member] | Commercial Real Estate Portfolio Segment [Member] | Measurement Input, Comparability Adjustment [Member] | Appraisals of Collateral Value [Member] | Maximum [Member] |  |
Collateral dependent loans, rate | 5 | 0
Fair Value, Inputs, Level 3 [Member] | Commercial Real Estate Portfolio Segment [Member] | Measurement Input, Comparability Adjustment [Member] | Appraisals of Collateral Value [Member] | Weighted Average [Member] |  |
Collateral dependent loans, rate | 6 | 15
Fair Value, Inputs, Level 3 [Member] | Commercial Real Estate Portfolio Segment [Member] | Measurement Input, Comparability Adjustment [Member] | Appraisals of Collateral Value [Member] | Minimum [Member] |  |
Collateral dependent loans, rate | 15 | 20
Fair Value, Inputs, Level 3 [Member] | Residential Portfolio Segment [Member] |  |
Collateral dependent loans, fair value | $ 1,319 | $ 1,392
Fair Value, Inputs, Level 3 [Member] | Residential Portfolio Segment [Member] | Measurement Input, Comparability Adjustment [Member] | Appraisals of Collateral Value [Member] |  |
Collateral dependent loans, fair value | $ 1,319 | $ 1,392
Fair Value, Inputs, Level 3 [Member] | Residential Portfolio Segment [Member] | Measurement Input, Comparability Adjustment [Member] | Appraisals of Collateral Value [Member] | Maximum [Member] |  |
Collateral dependent loans, rate | 39 | 39
Fair Value, Inputs, Level 3 [Member] | Residential Portfolio Segment [Member] | Measurement Input, Comparability Adjustment [Member] | Appraisals of Collateral Value [Member] | Weighted Average [Member] |  |
Collateral dependent loans, rate | 27 | 22
Fair Value, Inputs, Level 3 [Member] | Residential Portfolio Segment [Member] | Measurement Input, Comparability Adjustment [Member] | Appraisals of Collateral Value [Member] | Minimum [Member] |  |
Collateral dependent loans, rate | 21 | 21

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