Note 11 - Reconciliation of the Tax Provision (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2022	Sep. 30, 2022	Jun. 30, 2022	Mar. 31, 2022	Dec. 31, 2021	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Reconciliation Of The Tax Provision [Abstract]
Provision at statutory rate									$ 4,113	$ 4,295	$ 3,075
Tax-exempt interest and dividend income									(504)	(527)	(518)
Bank-owned life insurance									(75)	(104)	(62)
Stock-based compensation expense									20	19	20
State income tax									62	245	35
Other									41	33	12
Income tax provision									3,657	3,961	2,562
Valuation Adjustment									8	0	0
Net provision	$ 1,560	$ 634	$ 647	$ 824	$ 1,052	$ 685	$ 951	$ 1,273	$ 3,665	$ 3,961	$ 2,562
Provision at statutory rate									21.00%	21.00%	21.00%
Tax-exempt interest and dividend income									(2.60%)	(2.60%)	(3.50%)
Bank-owned life insurance									(0.40%)	(0.50%)	(0.40%)
Stock-based compensation expense									0.10%	0.10%	0.10%
State income tax									0.30%	1.20%	0.20%
Other									0.20%	0.20%	0.10%
Income tax provision									18.70%	19.40%	17.50%
Valuation Adjustment									0.00%	0.00%	0.00%
Net provision									18.70%	19.40%	17.50%