Note 3 - Loans and Allowance for Loan Losses - Activity for Troubled Debt Restructurings (Details) - USD ($)		3 Months Ended	6 Months Ended
		Jun. 30, 2022	Jun. 30, 2022
Commercial Portfolio Segment [Member] | Commercial and Industrial [Member]
Beginning Balance		$ 2,829,000	$ 4,973,000
Charge-Offs		0	0
Payments (net)		536,000	324,000
Transfers to ORE		0	0
Net Additions/Deletions		6,573,000	4,641,000
Ending Balance		9,938,000	9,938,000
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		89,000	10,435,000
Charge-Offs		0	0
Payments (net)		(2,000)	(9,679,000)
Transfers to ORE		0	0
Net Additions/Deletions		0	(669,000)
Ending Balance		87,000	87,000
Commercial Portfolio Segment [Member] | Real Estate Non Owner Occupied Loan [Member]
Beginning Balance		143,000	146,000
Charge-Offs		0	0
Payments (net)		(4,000)	(7,000)
Transfers to ORE		0	0
Net Additions/Deletions		0	0
Ending Balance		139,000	139,000
Commercial Portfolio Segment [Member] | Real Estate Multi Family and Residential Rental Loan [Member]
Beginning Balance		90,000	91,000
Charge-Offs		0	0
Payments (net)		(2,000)	(3,000)
Transfers to ORE		0	0
Net Additions/Deletions		0	0
Ending Balance		88,000	88,000
Retail Portfolio Segment [Member] | One to Four Family Mortgages [Member]
Beginning Balance		2,346,000	627,000
Charge-Offs		0	0
Payments (net)		(91,000)	(169,000)
Transfers to ORE		0	0
Net Additions/Deletions	[1]	84,000	1,881,000
Ending Balance		2,339,000	2,339,000
Retail Portfolio Segment [Member] | Other Consumer Loans [Member]
Beginning Balance		13,000	1,202,000
Charge-Offs		0	0
Payments (net)		(10,000)	(12,000)
Transfers to ORE		0	0
Net Additions/Deletions	[1]	0	(1,187,000)
Ending Balance		$ 3,000	$ 3,000

[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.