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Note 11 - Income Taxes - Reconciliation of Effective Income Tax Rate (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Current federal income tax expense	$ 3,532	$ 3,070	$ 984
Deferred federal income tax expense/(benefit)	924	202	310
Income tax expense	4,456	3,272	1,294
Income tax computed at statutory federal rate of 21%	5,565	3,966	1,778
Tax exempt interest income	(1,190)	(574)	(320)
Tax exempt earnings on bank-owned life insurance	(170)	(162)	(162)
Tax credits	(284)	(240)	(218)
Nondeductible merger expenses	0	182	164
Disallowed interest expense	74	64	13
Other items	$ 461	$ 36	$ 39
Effective income tax rate	17.00%	17.00%	15.00%

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