Note 4 - Loans and Allowance for Credit Losses - Collateral Dependent Loans (Details) - USD ($) $ in Thousands	Jun. 30, 2024	Dec. 31, 2023
Collateral Dependent Loans	$ 7,112	$ 3,433
Allowance for Credit Loss	901	69
Real Estate [Member]
Collateral Dependent Loans	4,941	3,395
Equipment [Member]
Collateral Dependent Loans	2,029
Real Estate, Other [Member]
Collateral Dependent Loans	142	38
Residential Portfolio Segment [Member] | One-to-four Family Loan [Member]
Collateral Dependent Loans	1,539	1,651
Allowance for Credit Loss	0	9
Residential Portfolio Segment [Member] | One-to-four Family Loan [Member] | Real Estate [Member]
Collateral Dependent Loans	1,539	1,651
Residential Portfolio Segment [Member] | One-to-four Family Loan [Member] | Equipment [Member]
Collateral Dependent Loans	0
Residential Portfolio Segment [Member] | One-to-four Family Loan [Member] | Real Estate, Other [Member]
Collateral Dependent Loans	0	0
Residential Portfolio Segment [Member] | Home Equity and Second Mortgage [Member]
Collateral Dependent Loans	647	548
Allowance for Credit Loss	0	0
Residential Portfolio Segment [Member] | Home Equity and Second Mortgage [Member] | Real Estate [Member]
Collateral Dependent Loans	647	548
Residential Portfolio Segment [Member] | Home Equity and Second Mortgage [Member] | Equipment [Member]
Collateral Dependent Loans	0
Residential Portfolio Segment [Member] | Home Equity and Second Mortgage [Member] | Real Estate, Other [Member]
Collateral Dependent Loans	0	0
Residential Portfolio Segment [Member] | Multifamily [Member]
Collateral Dependent Loans	0	0
Allowance for Credit Loss	0	0
Residential Portfolio Segment [Member] | Multifamily [Member] | Real Estate [Member]
Collateral Dependent Loans	0	0
Residential Portfolio Segment [Member] | Multifamily [Member] | Equipment [Member]
Collateral Dependent Loans	0
Residential Portfolio Segment [Member] | Multifamily [Member] | Real Estate, Other [Member]
Collateral Dependent Loans	0	0
Construction [Member] | One-to-four Family Residential Construction [Member]
Collateral Dependent Loans	87	87
Allowance for Credit Loss	50	60
Construction [Member] | One-to-four Family Residential Construction [Member] | Real Estate [Member]
Collateral Dependent Loans	87	87
Construction [Member] | One-to-four Family Residential Construction [Member] | Equipment [Member]
Collateral Dependent Loans	0
Construction [Member] | One-to-four Family Residential Construction [Member] | Real Estate, Other [Member]
Collateral Dependent Loans	0	0
Construction [Member] | Other Construction, Development and Land [Member]
Collateral Dependent Loans	54	54
Allowance for Credit Loss	0	0
Construction [Member] | Other Construction, Development and Land [Member] | Real Estate [Member]
Collateral Dependent Loans	54	54
Construction [Member] | Other Construction, Development and Land [Member] | Equipment [Member]
Collateral Dependent Loans	0
Construction [Member] | Other Construction, Development and Land [Member] | Real Estate, Other [Member]
Collateral Dependent Loans	0	0
Commercial Portfolio Segment [Member] | Commercial Real Estate Loan [Member]
Collateral Dependent Loans	2,614	1,055
Allowance for Credit Loss	0	0
Commercial Portfolio Segment [Member] | Commercial Real Estate Loan [Member] | Real Estate [Member]
Collateral Dependent Loans	2,614	1,055
Commercial Portfolio Segment [Member] | Commercial Real Estate Loan [Member] | Equipment [Member]
Collateral Dependent Loans	0
Commercial Portfolio Segment [Member] | Commercial Real Estate Loan [Member] | Real Estate, Other [Member]
Collateral Dependent Loans	0	0
Commercial Portfolio Segment [Member] | Commercial Business [Member]
Collateral Dependent Loans	2,171	38
Allowance for Credit Loss	851	0
Commercial Portfolio Segment [Member] | Commercial Business [Member] | Real Estate [Member]
Collateral Dependent Loans	0	0
Commercial Portfolio Segment [Member] | Commercial Business [Member] | Equipment [Member]
Collateral Dependent Loans	2,029
Commercial Portfolio Segment [Member] | Commercial Business [Member] | Real Estate, Other [Member]
Collateral Dependent Loans	142	38
Consumer Portfolio Segment [Member] | Other Consumer Loan [Member]
Collateral Dependent Loans	0	0
Allowance for Credit Loss	0	0
Consumer Portfolio Segment [Member] | Other Consumer Loan [Member] | Real Estate [Member]
Collateral Dependent Loans	0	0
Consumer Portfolio Segment [Member] | Other Consumer Loan [Member] | Equipment [Member]
Collateral Dependent Loans	0
Consumer Portfolio Segment [Member] | Other Consumer Loan [Member] | Real Estate, Other [Member]
Collateral Dependent Loans	$ 0	$ 0