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, 2022
Retail Portfolio Segment [Member] | One to Four Family Mortgages [Member]
Beginning Balance		$ 2,339,000	$ 627,000
Charge-Offs		0	0
Payments (net)		(84,000)	(253,000)
Transfers to ORE		0	0
Net Additions/Deletions	[1]	289,000	2,170,000
Ending Balance		2,544,000	2,544,000
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	[1]	0	(1,187,000)
Ending Balance		2,000	2,000
Commercial Portfolio Segment [Member] | Commercial and Industrial [Member]
Beginning Balance		9,938,000	4,973,000
Charge-Offs		0	(95,000)
Payments (net)		(891,000)	(378,000)
Transfers to ORE		0	0
Net Additions/Deletions		19,000	4,566,000
Ending Balance		9,066,000	9,066,000
Commercial Portfolio Segment [Member] | Vacant Land and Land Development and Residential Construction Loan [Member]
Beginning Balance		0	0
Charge-Offs		0	0
Payments (net)		0	0
Transfers to ORE		0	0
Net Additions/Deletions		0	0
Ending Balance		0	0
Commercial Portfolio Segment [Member] | Real Estate Owner Occupied Loan [Member]
Beginning Balance		87,000	10,435,000
Charge-Offs		0	0
Payments (net)		(3,000)	(9,682,000)
Transfers to ORE		0	0
Net Additions/Deletions		0	(669,000)
Ending Balance		84,000	84,000
Commercial Portfolio Segment [Member] | Real Estate Non Owner Occupied Loan [Member]
Beginning Balance		139,000	146,000
Charge-Offs		0	0
Payments (net)		(4,000)	(11,000)
Transfers to ORE		0	0
Net Additions/Deletions		0	0
Ending Balance		135,000	135,000
Commercial Portfolio Segment [Member] | Real Estate Multi Family and Residential Rental Loan [Member]
Beginning Balance		88,000	91,000
Charge-Offs		0	0
Payments (net)		(88,000)	(91,000)
Transfers to ORE		0	0
Net Additions/Deletions		0	0
Ending Balance		$ 0	$ 0

[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.