Note 3 - Loans and Allowance for Loan Losses - Activity for Troubled Debt Restructurings (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022		Sep. 30, 2021
Commercial Portfolio Segment [Member] | Commercial and Industrial [Member]
Beginning Balance	$ 9,938,000	$ 5,563,000	$ 4,973,000		$ 6,414,000
Charge-Offs	0	(17,000)	(95,000)		(17,000)
Payments (net)	(891,000)	(75,000)	(378,000)		(3,596,000)
Transfers to ORE	0	0	0		0
Net Additions/Deletions	19,000	184,000	4,566,000		2,854,000
Ending Balance	9,066,000	5,655,000	9,066,000		5,655,000
Commercial Portfolio Segment [Member] | Vacant Land and Land Development and Residential Construction Loan [Member]
Beginning Balance	0	0	0		0
Charge-Offs	0	0	0		0
Payments (net)	0	0	0		0
Transfers to ORE	0	0	0		0
Net Additions/Deletions	0	0	0		0
Ending Balance	0	0	0		0
Commercial Portfolio Segment [Member] | Real Estate Owner Occupied Loan [Member]
Beginning Balance	87,000	13,888,000	10,435,000		14,797,000
Charge-Offs	0	0	0		0
Payments (net)	(3,000)	(439,000)	(9,682,000)		(2,034,000)
Transfers to ORE	0	0	0		0
Net Additions/Deletions	0	0	(669,000)		686,000
Ending Balance	84,000	13,449,000	84,000		13,449,000
Commercial Portfolio Segment [Member] | Real Estate Non Owner Occupied Loan [Member]
Beginning Balance	139,000	153,000	146,000		480,000
Charge-Offs	0	0	0		0
Payments (net)	(4,000)	(2,000)	(11,000)		(329,000)
Transfers to ORE	0	0	0		0
Net Additions/Deletions	0	0	0		0
Ending Balance	135,000	151,000	135,000		151,000
Commercial Portfolio Segment [Member] | Real Estate Multi Family and Residential Rental Loan [Member]
Beginning Balance	88,000	0	91,000		0
Charge-Offs	0	0	0		0
Payments (net)	(88,000)	0	(91,000)		0
Transfers to ORE	0	0	0		0
Net Additions/Deletions	0	92,000	0		92,000
Ending Balance	0	92,000	0		92,000
Retail Portfolio Segment [Member] | One to Four Family Mortgages [Member]
Beginning Balance	2,339,000	699,000	627,000		806,000
Charge-Offs	0	0	0		0
Payments (net)	(84,000)	(51,000)	(253,000)		(204,000)
Transfers to ORE	0	0	0		0
Net Additions/Deletions	289,000	0	2,170,000	[1]	46,000
Ending Balance	2,544,000	648,000	2,544,000		648,000
Retail Portfolio Segment [Member] | Other Consumer Loans [Member]
Beginning Balance	3,000		1,202,000
Charge-Offs	0		0
Payments (net)	(1,000)		(13,000)
Transfers to ORE	0		0
Net Additions/Deletions	0		(1,187,000)	[1]
Ending Balance	$ 2,000		$ 2,000
Retail Portfolio Segment [Member] | Home Equity and Other [Member]
Beginning Balance		1,396,000			1,146,000
Charge-Offs		0			0
Payments (net)		(91,000)			(323,000)
Transfers to ORE		0			0
Net Additions/Deletions		0			482,000
Ending Balance		$ 1,305,000			$ 1,305,000

[1] Includes $1.2 million in the transfer of home equity lines of credit from other consumer loans to 1-4 family mortgages in association with the adoption of the CECL methodology effective January 1, 2022.