Note 2 - Loans Receivable - Past Due (Details) - USD ($) $ in Thousands	Jun. 30, 2026	Dec. 31, 2025
Loans receivable, before allowance and fee	$ 30,069	$ 30,725
Loans receivable, Past due greater than 90 days accruing	0	0
Financial Asset, 30 to 90 Days Past Due [Member]
Loans receivable, before allowance and fee	88	0
Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Loans receivable, before allowance and fee	67	136
Financial Asset, Not Past Due [Member]
Loans receivable, before allowance and fee	29,914	30,589
Real Estate Loan [Member]
Loans receivable, before allowance and fee	29,861	30,513
Share Loans [Member]
Loans receivable, before allowance and fee	208	212
Loans receivable, Past due greater than 90 days accruing	0	0
Share Loans [Member] \| Financial Asset, 30 to 90 Days Past Due [Member]
Loans receivable, before allowance and fee	0	0
Share Loans [Member] \| Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Loans receivable, before allowance and fee	0	0
Share Loans [Member] \| Financial Asset, Not Past Due [Member]
Loans receivable, before allowance and fee	208	212
Residential Portfolio Segment [Member] \| Real Estate Loan [Member]
Loans receivable, before allowance and fee	29,120	30,037
Loans receivable, Past due greater than 90 days accruing	0	0
Residential Portfolio Segment [Member] \| Real Estate Loan [Member] \| Financial Asset, 30 to 90 Days Past Due [Member]
Loans receivable, before allowance and fee	88	0
Residential Portfolio Segment [Member] \| Real Estate Loan [Member] \| Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Loans receivable, before allowance and fee	67	136
Residential Portfolio Segment [Member] \| Real Estate Loan [Member] \| Financial Asset, Not Past Due [Member]
Loans receivable, before allowance and fee	28,965	29,901
Construction Portfolio Segment [Member] \| Real Estate Loan [Member]
Loans receivable, before allowance and fee	151	0
Loans receivable, Past due greater than 90 days accruing	0	0
Construction Portfolio Segment [Member] \| Real Estate Loan [Member] \| Financial Asset, 30 to 90 Days Past Due [Member]
Loans receivable, before allowance and fee	0	0
Construction Portfolio Segment [Member] \| Real Estate Loan [Member] \| Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Loans receivable, before allowance and fee	0	0
Construction Portfolio Segment [Member] \| Real Estate Loan [Member] \| Financial Asset, Not Past Due [Member]
Loans receivable, before allowance and fee	151	0
Commercial Real Estate Portfolio Segment [Member]
Loans receivable, before allowance and fee	590	476
Commercial Real Estate Portfolio Segment [Member] \| Real Estate Loan [Member]
Loans receivable, before allowance and fee	590	476
Loans receivable, Past due greater than 90 days accruing	0	0
Commercial Real Estate Portfolio Segment [Member] \| Real Estate Loan [Member] \| Financial Asset, 30 to 90 Days Past Due [Member]
Loans receivable, before allowance and fee	0	0
Commercial Real Estate Portfolio Segment [Member] \| Real Estate Loan [Member] \| Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Loans receivable, before allowance and fee	0	0
Commercial Real Estate Portfolio Segment [Member] \| Real Estate Loan [Member] \| Financial Asset, Not Past Due [Member]
Loans receivable, before allowance and fee	$ 590	$ 476