Note 11 - Fair Value of Financial Instruments - Financial Assets and Liabilities, Valuation Techniques and Significant Unobservable Inputs (Details)	Jun. 30, 2023
Minimum [Member] | Measurement Input, Discount Rate [Member] | Valuation, Market Approach [Member]
Collerateral-dependent loans individually evaluated	0.10
Real estate and other repossessed assets, input	0.10
Minimum [Member] | Measurement Input, Pull-through Expectations [Member] | Valuation, Income Approach [Member]
Interest rate lock commitments, input	0.80
Maximum [Member] | Measurement Input, Discount Rate [Member] | Valuation, Market Approach [Member]
Collerateral-dependent loans individually evaluated	0.30
Real estate and other repossessed assets, input	0.30
Maximum [Member] | Measurement Input, Pull-through Expectations [Member] | Valuation, Income Approach [Member]
Interest rate lock commitments, input	0.90