Note 11 - Reconciliation of the Tax Provision (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2023	Sep. 30, 2023	Jun. 30, 2023	Mar. 31, 2023	Dec. 31, 2022	Sep. 30, 2022	Jun. 30, 2022	Mar. 31, 2022	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Reconciliation Of The Tax Provision [Abstract]
Provision at statutory rate									$ 2,463	$ 4,113	$ 4,295
Tax-exempt interest and dividend income									(267)	(504)	(527)
Bank-owned life insurance									(67)	(75)	(104)
Stock-based compensation expense									26	20	19
State income tax									53	62	245
Other									40	41	33
Income tax provision									2,248	3,657	3,961
Valuation Adjustment									(4)	8	0
Net provision	$ 302	$ 494	$ 325	$ 1,123	$ 1,560	$ 634	$ 647	$ 824	$ 2,244	$ 3,665	$ 3,961
Provision at statutory rate									21.00%	21.00%	21.00%
Tax-exempt interest and dividend income									(2.30%)	(2.60%)	(2.60%)
Bank-owned life insurance									(0.60%)	(0.40%)	(0.50%)
Stock-based compensation expense									0.20%	0.10%	0.10%
State income tax									0.50%	0.30%	1.20%
Other									0.30%	0.20%	0.20%
Income tax provision									19.20%	18.70%	19.40%
Valuation Adjustment									(0.10%)	0.00%	0.00%
Net provision									19.10%	18.70%	19.40%