Note 16 - Amounts Reclassified Out of Accumulated Other Comprehensive Income (Loss) (Details) - USD ($) $ in Thousands		3 Months Ended								12 Months Ended
		Dec. 31, 2021	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Reclassification Adjustment Out Of Accumulated Other Comprehensive Income [Line Items]
Income before income taxes		$ 5,201	$ 4,109	$ 4,820	$ 6,323	$ 5,207	$ 4,692	$ 4,932	$ (186)	$ 20,453	$ 14,645	$ 15,207
Tax effect		(1,052)	(685)	(951)	(1,273)	(1,056)	(914)	(998)	406	(3,961)	(2,562)	(2,850)
Net income		$ 4,149	$ 3,424	$ 3,869	$ 5,050	$ 4,151	$ 3,778	$ 3,934	$ 220	16,492	12,083	12,357
Reclassification out of Accumulated Other Comprehensive Income
Reclassification Adjustment Out Of Accumulated Other Comprehensive Income [Line Items]
Realized net holding gains (losses) on available-for-sale securities										18	24	(26)
Income before income taxes										18	24	(26)
Tax effect	[1]									(4)	(5)	5
Net income										$ 14	$ 19	$ (21)

[1] *At rate of 21%