Note 3 - Loans Receivable - Collateral Dependent Loans (Details) - USD ($)	Dec. 31, 2025	Dec. 31, 2024
Loans, individually evaluated	$ 25,900,000	$ 35,800,000
Single Family Residence [Member]
Loans, individually evaluated	5,056,000	9,263,000
Condominium [Member]
Loans, individually evaluated	5,146,000	11,384,000
Multifamily [Member]
Loans, individually evaluated	4,531,000
Office Building [Member]
Loans, individually evaluated	6,306,000
Gas Station [Member]
Loans, individually evaluated	3,435,000
Business Assets [Member]
Loans, individually evaluated	1,108,000	604,000
Collateral Pledged [Member]
Loans, individually evaluated	25,582,000	33,246,000
Warehouse [Member]
Loans, individually evaluated		11,995,000
Automobiles [Member]
Loans, individually evaluated		0
Real Estate Portfolio Segment [Member] | One-to-four Family Loan [Member] | Single Family Residence [Member]
Loans, individually evaluated	2,181,000	1,113,000
Real Estate Portfolio Segment [Member] | One-to-four Family Loan [Member] | Condominium [Member]
Loans, individually evaluated	0	0
Real Estate Portfolio Segment [Member] | One-to-four Family Loan [Member] | Multifamily [Member]
Loans, individually evaluated	0
Real Estate Portfolio Segment [Member] | One-to-four Family Loan [Member] | Office Building [Member]
Loans, individually evaluated	0
Real Estate Portfolio Segment [Member] | One-to-four Family Loan [Member] | Gas Station [Member]
Loans, individually evaluated	0
Real Estate Portfolio Segment [Member] | One-to-four Family Loan [Member] | Business Assets [Member]
Loans, individually evaluated	0	0
Real Estate Portfolio Segment [Member] | One-to-four Family Loan [Member] | Collateral Pledged [Member]
Loans, individually evaluated	2,181,000	1,113,000
Real Estate Portfolio Segment [Member] | One-to-four Family Loan [Member] | Warehouse [Member]
Loans, individually evaluated		0
Real Estate Portfolio Segment [Member] | One-to-four Family Loan [Member] | Automobiles [Member]
Loans, individually evaluated		0
Real Estate Portfolio Segment [Member] | Multi-family Loan [Member] | Single Family Residence [Member]
Loans, individually evaluated	0
Real Estate Portfolio Segment [Member] | Multi-family Loan [Member] | Condominium [Member]
Loans, individually evaluated	0
Real Estate Portfolio Segment [Member] | Multi-family Loan [Member] | Multifamily [Member]
Loans, individually evaluated	4,531
Real Estate Portfolio Segment [Member] | Multi-family Loan [Member] | Office Building [Member]
Loans, individually evaluated	0
Real Estate Portfolio Segment [Member] | Multi-family Loan [Member] | Gas Station [Member]
Loans, individually evaluated	0
Real Estate Portfolio Segment [Member] | Multi-family Loan [Member] | Business Assets [Member]
Loans, individually evaluated	0
Real Estate Portfolio Segment [Member] | Multi-family Loan [Member] | Collateral Pledged [Member]
Loans, individually evaluated	4,531
Real Estate Portfolio Segment [Member] | Commercial Real Estate [Member] | Single Family Residence [Member]
Loans, individually evaluated	0	0
Real Estate Portfolio Segment [Member] | Commercial Real Estate [Member] | Condominium [Member]
Loans, individually evaluated	0	0
Real Estate Portfolio Segment [Member] | Commercial Real Estate [Member] | Multifamily [Member]
Loans, individually evaluated	0
Real Estate Portfolio Segment [Member] | Commercial Real Estate [Member] | Office Building [Member]
Loans, individually evaluated	6,306,000
Real Estate Portfolio Segment [Member] | Commercial Real Estate [Member] | Gas Station [Member]
Loans, individually evaluated	3,435,000
Real Estate Portfolio Segment [Member] | Commercial Real Estate [Member] | Business Assets [Member]
Loans, individually evaluated	0	0
Real Estate Portfolio Segment [Member] | Commercial Real Estate [Member] | Collateral Pledged [Member]
Loans, individually evaluated	9,741,000	11,995,000
Real Estate Portfolio Segment [Member] | Commercial Real Estate [Member] | Warehouse [Member]
Loans, individually evaluated		11,995,000
Real Estate Portfolio Segment [Member] | Commercial Real Estate [Member] | Automobiles [Member]
Loans, individually evaluated		0
Real Estate Portfolio Segment [Member] | Construction Loans [Member] | Single Family Residence [Member]
Loans, individually evaluated	0	8,150,000
Real Estate Portfolio Segment [Member] | Construction Loans [Member] | Condominium [Member]
Loans, individually evaluated	5,139,000	11,384,000
Real Estate Portfolio Segment [Member] | Construction Loans [Member] | Multifamily [Member]
Loans, individually evaluated	0
Real Estate Portfolio Segment [Member] | Construction Loans [Member] | Office Building [Member]
Loans, individually evaluated	0
Real Estate Portfolio Segment [Member] | Construction Loans [Member] | Gas Station [Member]
Loans, individually evaluated	0
Real Estate Portfolio Segment [Member] | Construction Loans [Member] | Business Assets [Member]
Loans, individually evaluated	0	0
Real Estate Portfolio Segment [Member] | Construction Loans [Member] | Collateral Pledged [Member]
Loans, individually evaluated	5,139,000	19,534,000
Real Estate Portfolio Segment [Member] | Construction Loans [Member] | Warehouse [Member]
Loans, individually evaluated		0
Real Estate Portfolio Segment [Member] | Construction Loans [Member] | Automobiles [Member]
Loans, individually evaluated		0
Commercial Portfolio Segment [Member] | Single Family Residence [Member]
Loans, individually evaluated	2,875,000	0
Commercial Portfolio Segment [Member] | Condominium [Member]
Loans, individually evaluated	7,000	0
Commercial Portfolio Segment [Member] | Multifamily [Member]
Loans, individually evaluated	0
Commercial Portfolio Segment [Member] | Office Building [Member]
Loans, individually evaluated	0
Commercial Portfolio Segment [Member] | Gas Station [Member]
Loans, individually evaluated	0
Commercial Portfolio Segment [Member] | Business Assets [Member]
Loans, individually evaluated	1,108,000	604,000
Commercial Portfolio Segment [Member] | Collateral Pledged [Member]
Loans, individually evaluated	$ 3,990,000	604,000
Commercial Portfolio Segment [Member] | Warehouse [Member]
Loans, individually evaluated		0
Commercial Portfolio Segment [Member] | Automobiles [Member]
Loans, individually evaluated		$ 0