Note 3 - Loans Receivable - Collateral Dependent Loans (Details) - USD ($) $ in Thousands	Sep. 30, 2024	Dec. 31, 2023
Loans, individually evaluated	$ 31,800	$ 20,000
Single Family Residence [Member]
Loans, individually evaluated	9,526	1,456
Multi Family Housing [Member]
Loans, individually evaluated	5,624
Condominium [Member]
Loans, individually evaluated	11,187	15,100
Automobiles [Member]
Loans, individually evaluated	241	180
Business Assets [Member]
Loans, individually evaluated	603	652
Collateral Pledged [Member]
Loans, individually evaluated	27,181	17,388
Real Estate Portfolio Segment [Member] | One-to-four Family Loan [Member] | Single Family Residence [Member]
Loans, individually evaluated	1,319	1,426
Real Estate Portfolio Segment [Member] | One-to-four Family Loan [Member] | Multi Family Housing [Member]
Loans, individually evaluated	0
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] | Automobiles [Member]
Loans, individually evaluated	0	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	1,319	1,426
Real Estate Portfolio Segment [Member] | Commercial Real Estate [Member] | Single Family Residence [Member]
Loans, individually evaluated	0
Real Estate Portfolio Segment [Member] | Commercial Real Estate [Member] | Multi Family Housing [Member]
Loans, individually evaluated	5,624
Real Estate Portfolio Segment [Member] | Commercial Real Estate [Member] | Condominium [Member]
Loans, individually evaluated	0
Real Estate Portfolio Segment [Member] | Commercial Real Estate [Member] | Automobiles [Member]
Loans, individually evaluated	0
Real Estate Portfolio Segment [Member] | Commercial Real Estate [Member] | Business Assets [Member]
Loans, individually evaluated	0
Real Estate Portfolio Segment [Member] | Commercial Real Estate [Member] | Collateral Pledged [Member]
Loans, individually evaluated	5,624
Real Estate Portfolio Segment [Member] | Construction Loans [Member] | Single Family Residence [Member]
Loans, individually evaluated	8,178	0
Real Estate Portfolio Segment [Member] | Construction Loans [Member] | Multi Family Housing [Member]
Loans, individually evaluated	0
Real Estate Portfolio Segment [Member] | Construction Loans [Member] | Condominium [Member]
Loans, individually evaluated	11,187	14,981
Real Estate Portfolio Segment [Member] | Construction Loans [Member] | Automobiles [Member]
Loans, individually evaluated	0	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	19,365	14,981
Consumer Portfolio Segment [Member] | Home Equity Loan [Member] | Single Family Residence [Member]
Loans, individually evaluated	29	30
Consumer Portfolio Segment [Member] | Home Equity Loan [Member] | Multi Family Housing [Member]
Loans, individually evaluated	0
Consumer Portfolio Segment [Member] | Home Equity Loan [Member] | Condominium [Member]
Loans, individually evaluated	0	0
Consumer Portfolio Segment [Member] | Home Equity Loan [Member] | Automobiles [Member]
Loans, individually evaluated	0	0
Consumer Portfolio Segment [Member] | Home Equity Loan [Member] | Business Assets [Member]
Loans, individually evaluated	0	0
Consumer Portfolio Segment [Member] | Home Equity Loan [Member] | Collateral Pledged [Member]
Loans, individually evaluated	29	30
Consumer Portfolio Segment [Member] | Automobile and Other Loan [Member] | Single Family Residence [Member]
Loans, individually evaluated	0	0
Consumer Portfolio Segment [Member] | Automobile and Other Loan [Member] | Multi Family Housing [Member]
Loans, individually evaluated	0
Consumer Portfolio Segment [Member] | Automobile and Other Loan [Member] | Condominium [Member]
Loans, individually evaluated	0	0
Consumer Portfolio Segment [Member] | Automobile and Other Loan [Member] | Automobiles [Member]
Loans, individually evaluated	241	180
Consumer Portfolio Segment [Member] | Automobile and Other Loan [Member] | Business Assets [Member]
Loans, individually evaluated	0	0
Consumer Portfolio Segment [Member] | Automobile and Other Loan [Member] | Collateral Pledged [Member]
Loans, individually evaluated	241	180
Commercial Portfolio Segment [Member] | Single Family Residence [Member]
Loans, individually evaluated	0	0
Commercial Portfolio Segment [Member] | Multi Family Housing [Member]
Loans, individually evaluated	0
Commercial Portfolio Segment [Member] | Condominium [Member]
Loans, individually evaluated	0	119
Commercial Portfolio Segment [Member] | Automobiles [Member]
Loans, individually evaluated	0	0
Commercial Portfolio Segment [Member] | Business Assets [Member]
Loans, individually evaluated	603	652
Commercial Portfolio Segment [Member] | Collateral Pledged [Member]
Loans, individually evaluated	$ 603	$ 771