Note 2 - Loans and Allowance for Credit Losses - Amortized Cost Bases of Collateral Dependent Loans (Details) - USD ($) $ in Thousands	Jun. 30, 2023	Dec. 31, 2022
Real Estate [Member]
Loans	$ 4,887	$ 638
Other Collateral [Member]
Loans	0	0
Collateral Pledged [Member]
Loans	4,887	638
Real Estate Portfolio Segment [Member] | Residential 1 to 4 Family [Member] | Real Estate [Member]
Loans	1,956	130
Real Estate Portfolio Segment [Member] | Residential 1 to 4 Family [Member] | Other Collateral [Member]
Loans	0	0
Real Estate Portfolio Segment [Member] | Residential 1 to 4 Family [Member] | Collateral Pledged [Member]
Loans	1,956	130
Real Estate Portfolio Segment [Member] | Commercial and Multifamily [Member] | Real Estate [Member]
Loans	2,931	508
Real Estate Portfolio Segment [Member] | Commercial and Multifamily [Member] | Other Collateral [Member]
Loans	0	0
Real Estate Portfolio Segment [Member] | Commercial and Multifamily [Member] | Collateral Pledged [Member]
Loans	2,931	508
Real Estate Portfolio Segment [Member] | Construction, Land Development and Farmland [Member] | Real Estate [Member]
Loans	0	0
Real Estate Portfolio Segment [Member] | Construction, Land Development and Farmland [Member] | Other Collateral [Member]
Loans	0	0
Real Estate Portfolio Segment [Member] | Construction, Land Development and Farmland [Member] | Collateral Pledged [Member]
Loans	0	0
Real Estate Portfolio Segment [Member] | Home Equity Loan [Member] | Real Estate [Member]
Loans	0	0
Real Estate Portfolio Segment [Member] | Home Equity Loan [Member] | Other Collateral [Member]
Loans	0	0
Real Estate Portfolio Segment [Member] | Home Equity Loan [Member] | Collateral Pledged [Member]
Loans	0	0
Commercial, Industrial and Agricultural Portfolio [Member] | Real Estate [Member]
Loans	0	0
Commercial, Industrial and Agricultural Portfolio [Member] | Other Collateral [Member]
Loans	0	0
Commercial, Industrial and Agricultural Portfolio [Member] | Collateral Pledged [Member]
Loans	0	0
Consumer Portfolio Segment [Member] | Real Estate [Member]
Loans	0	0
Consumer Portfolio Segment [Member] | Other Collateral [Member]
Loans	0	0
Consumer Portfolio Segment [Member] | Collateral Pledged [Member]
Loans	$ 0	$ 0