Note 13 - Fair Value Measurements - Assets Measured At Fair Value on a Non-recurring Basis and Quantitative Information (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023	Dec. 31, 2023	Dec. 31, 2022
Loans, gross	$ 1,250,225		$ 1,220,265
Individually evaluated loans - collateral dependent	12,455	$ 12,279	$ 11,986	$ 14,193
Fair Value, Nonrecurring [Member] | Fair Value, Inputs, Level 3 [Member] | Valuation, Income Approach [Member] | Impaired Loans, Collateral Dependent [Member]
Loans, gross	4,309	3,801
Individually evaluated loans - collateral dependent	272	121
Individually evaluated loans - collateral dependent	$ 4,037	$ 3,680
Individually evaluated loans - collateral dependent	10.00%	10.00%
Fair Value, Nonrecurring [Member] | Fair Value, Inputs, Level 3 [Member] | Valuation, Income Approach [Member] | Impaired Loans, Other [Member]
Loans, gross	$ 239	$ 441
Individually evaluated loans - collateral dependent	0	0
Individually evaluated loans - collateral dependent	$ 239	$ 441
Fair Value, Nonrecurring [Member] | Fair Value, Inputs, Level 3 [Member] | Valuation, Income Approach [Member] | Impaired Loans, Other [Member] | Minimum [Member]
Individually evaluated loans - other	3.13%	0.00%
Fair Value, Nonrecurring [Member] | Fair Value, Inputs, Level 3 [Member] | Valuation, Income Approach [Member] | Impaired Loans, Other [Member] | Maximum [Member]
Individually evaluated loans - other	16.06%	16.06%
Fair Value, Nonrecurring [Member] | Fair Value, Inputs, Level 3 [Member] | Valuation Technique, Discounted Cash Flow [Member] | Repossessed Assets [Member]
Individually evaluated loans - other	10.00%	10.00%
Repossessed assets	$ 499	$ 420
Repossessed assets	0	0
Repossessed assets	$ 499	$ 420