Note 3 - Loans and Allowance for Loan Losses - Loans on Nonaccrual Status (Details) - USD ($) $ in Thousands	Jun. 30, 2024	Dec. 31, 2023
Nonaccrual, No Allowance	$ 0	$ 200
Non-accrual	0	200
First Mortgage Loans [Member] | One To Four Family Residential [Member]
Nonaccrual, No Allowance	0	200
Non-accrual	0	200
First Mortgage Loans [Member] | Multifamily [Member]
Nonaccrual, No Allowance	0	0
Non-accrual	0	0
First Mortgage Loans [Member] | Commercial Real Estate [Member]
Nonaccrual, No Allowance	0	0
Non-accrual	0	0
First Mortgage Loans [Member] | Construction Loans [Member]
Nonaccrual, No Allowance	0	0
Non-accrual	0	0
Consumer Portfolio Segment [Member]
Nonaccrual, No Allowance	0	0
Non-accrual	$ 0	$ 0