Note 20 - 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	Dec. 31, 2022 USD ($)	Dec. 31, 2021 USD ($)
Commercial Portfolio Segment [Member]
Collateral dependent loans, fair value	$ 14,550	$ 13,399
Commercial Real Estate Portfolio Segment [Member]
Collateral dependent loans, fair value	17,264	20,185
Residential Portfolio Segment [Member]
Collateral dependent loans, fair value	1,392	2,794
Fair Value, Inputs, Level 3 [Member] | Commercial Portfolio Segment [Member]
Collateral dependent loans, fair value	14,550	13,399
Fair Value, Inputs, Level 3 [Member] | Commercial Portfolio Segment [Member] | Average Transfer Price as Price to Unpaid Principal Balance [Member]
Collateral dependent loans, fair value	$ 14,028	$ 12,193
Fair Value, Inputs, Level 3 [Member] | Commercial Portfolio Segment [Member] | Average Transfer Price as Price to Unpaid Principal Balance [Member] | Minimum [Member]
Collateral dependent loans, rate	0.65	0.48
Fair Value, Inputs, Level 3 [Member] | Commercial Portfolio Segment [Member] | Average Transfer Price as Price to Unpaid Principal Balance [Member] | Maximum [Member]
Collateral dependent loans, rate	0.96	0.73
Fair Value, Inputs, Level 3 [Member] | Commercial Portfolio Segment [Member] | Average Transfer Price as Price to Unpaid Principal Balance [Member] | Weighted Average [Member]
Collateral dependent loans, rate	0.67	0.49
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	$ 522	$ 1,206
Fair Value, Inputs, Level 3 [Member] | Commercial Portfolio Segment [Member] | Measurement Input, Comparability Adjustment [Member] | Minimum [Member] | Appraisals of Collateral Value [Member]
Collateral dependent loans, rate	0.10	0.10
Fair Value, Inputs, Level 3 [Member] | Commercial Portfolio Segment [Member] | Measurement Input, Comparability Adjustment [Member] | Maximum [Member] | Appraisals of Collateral Value [Member]
Collateral dependent loans, rate	0.13	0.35
Fair Value, Inputs, Level 3 [Member] | Commercial Portfolio Segment [Member] | Measurement Input, Comparability Adjustment [Member] | Weighted Average [Member] | Appraisals of Collateral Value [Member]
Collateral dependent loans, rate	0.03	0.06
Fair Value, Inputs, Level 3 [Member] | Commercial Real Estate Portfolio Segment [Member]
Collateral dependent loans, fair value	$ 17,264	$ 20,185
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	$ 17,264	$ 20,185
Fair Value, Inputs, Level 3 [Member] | Commercial Real Estate Portfolio Segment [Member] | Measurement Input, Comparability Adjustment [Member] | Minimum [Member] | Appraisals of Collateral Value [Member]
Collateral dependent loans, rate	0.20	0.20
Fair Value, Inputs, Level 3 [Member] | Commercial Real Estate Portfolio Segment [Member] | Measurement Input, Comparability Adjustment [Member] | Maximum [Member] | Appraisals of Collateral Value [Member]
Collateral dependent loans, rate	0	0.15
Fair Value, Inputs, Level 3 [Member] | Commercial Real Estate Portfolio Segment [Member] | Measurement Input, Comparability Adjustment [Member] | Weighted Average [Member] | Appraisals of Collateral Value [Member]
Collateral dependent loans, rate	0.15	0.06
Fair Value, Inputs, Level 3 [Member] | Residential Portfolio Segment [Member]
Collateral dependent loans, fair value	$ 1,392	$ 2,794
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	$ 1,392	$ 2,794
Fair Value, Inputs, Level 3 [Member] | Residential Portfolio Segment [Member] | Measurement Input, Comparability Adjustment [Member] | Minimum [Member] | Appraisals of Collateral Value [Member]
Collateral dependent loans, rate	0.21	0.15
Fair Value, Inputs, Level 3 [Member] | Residential Portfolio Segment [Member] | Measurement Input, Comparability Adjustment [Member] | Maximum [Member] | Appraisals of Collateral Value [Member]
Collateral dependent loans, rate	0.39	0.39
Fair Value, Inputs, Level 3 [Member] | Residential Portfolio Segment [Member] | Measurement Input, Comparability Adjustment [Member] | Weighted Average [Member] | Appraisals of Collateral Value [Member]
Collateral dependent loans, rate	0.22	0.05