Note 11 - Provision for Income Taxes (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
Provision For Income Taxes [Abstract]
Current Federal income taxes									$ 3,543	$ 3,629	$ 2,569
Current state income taxes									180	219	52
Deferred Federal income taxes (benefits)									36	21	(53)
Deferred state income taxes (benefits)									(102)	92	(6)
Valuation adjustment									8	0	0
Net provision	$ 1,560	$ 634	$ 647	$ 824	$ 1,052	$ 685	$ 951	$ 1,273	$ 3,665	$ 3,961	$ 2,562