Note 2 - Loans Receivable - Summary of Loans (Details) - USD ($) $ in Thousands	Jun. 30, 2026	Mar. 31, 2026	Dec. 31, 2025	Jun. 30, 2025	Mar. 31, 2025	Dec. 31, 2024
Loans receivable, before allowance and fee	$ 30,069		$ 30,725
Unamortized, net deferred loan costs	188		179
Less allowance for credit losses	(185)	$ (185)	(185)	$ (185)	$ (185)	$ (185)
Loans receivable, net	30,072		30,719
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
Less allowance for credit losses	0	0	0	0	0	0
Residential Portfolio Segment [Member] \| Real Estate Loan [Member]
Loans receivable, before allowance and fee	29,120		30,037
Less allowance for credit losses	(176)	(179)	(178)	(147)	(155)	(173)
Construction Portfolio Segment [Member] \| Real Estate Loan [Member]
Loans receivable, before allowance and fee	151		0
Less allowance for credit losses	(2)	0	0	(27)	(22)	(3)
Commercial Real Estate Portfolio Segment [Member]
Loans receivable, before allowance and fee	590		476
Less allowance for credit losses	(7)	$ (6)	(7)	$ (11)	$ (8)	$ (9)
Commercial Real Estate Portfolio Segment [Member] \| Real Estate Loan [Member]
Loans receivable, before allowance and fee	$ 590		$ 476