Note 13 - Assets and Liabilities Measured and Reported at Fair Value - Significant Unobservable Inputs (Details) - Appraisal Discount Method [Member] - Fair Value, Inputs, Level 3 [Member] - Impaired Loans [Member] $ in Thousands	Mar. 31, 2024 USD ($)	Dec. 31, 2023 USD ($)
Collateral dependent loans, fair value	$ 7,632	$ 13,561
Other real estate owned, fair value	$ 10	$ 10
Weighted Average [Member]
Impaired Loans, Measurement Input	0.084	0.18
Other Real Estate Owned, Measurement Input	0.93	0.93