Note 11 - Deposits - Certificate Maturities (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Remaining term to maturity	$ 234,693	$ 131,939
Total certificates, weighted average rate	4.43%	2.59%
Due Within Next Year [Member]
Remaining term to maturity	$ 187,673	$ 72,737
Total certificates, weighted average rate	4.46%	1.86%
Due in Two Years [Member]
Remaining term to maturity	$ 34,567	$ 47,563
Total certificates, weighted average rate	4.40%	3.60%
Due in Three Years [Member]
Remaining term to maturity	$ 11,505	$ 10,101
Total certificates, weighted average rate	4.36%	3.32%
Due in Four Years [Member]
Remaining term to maturity	$ 639	$ 747
Total certificates, weighted average rate	0.63%	0.45%
Due in Five Years [Member]
Remaining term to maturity	$ 309	$ 777
Total certificates, weighted average rate	1.62%	0.73%
Due After Five Years [Member]
Remaining term to maturity	$ 0	$ 15
Total certificates, weighted average rate	0.00%	0.28%