Note 3 - Loans Receivable - Activity in Allowance for Credit Losses (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2026	Jun. 30, 2025	Jun. 30, 2026	Jun. 30, 2025
Balance	$ 17,709	$ 17,905	$ 17,478	$ 18,247
Provision (credit) for credit losses - loans	159	(115)	379	(469)
Charge-offs	(1)	(4)	(15)	(25)
Recoveries	17	14	42	47
Balance	17,884	17,800	17,884	17,800
Residential Portfolio Segment [Member] \| One to Four Family [Member]
Balance	4,446	4,979	4,916	5,286
Provision (credit) for credit losses - loans	(27)	126	(517)	(213)
Charge-offs	0	0	0	0
Recoveries	16	5	36	37
Balance	4,435	5,110	4,435	5,110
Residential Portfolio Segment [Member] \| Multifamily [Member]
Balance	7,599	6,938	6,948	7,079
Provision (credit) for credit losses - loans	78	(283)	726	(424)
Charge-offs	0	0	0	0
Recoveries	0	0	3	0
Balance	7,677	6,655	7,677	6,655
Residential Portfolio Segment [Member] \| Home Equity Loan [Member]
Balance	163	193	201	212
Provision (credit) for credit losses - loans	(20)	4	(58)	(15)
Charge-offs	0	0	0	0
Recoveries	0	0	0	0
Balance	143	197	143	197
Construction and Land Portfolio Segment [Member]
Balance	1,055	1,042	932	1,205
Provision (credit) for credit losses - loans	(1)	138	121	(26)
Charge-offs	0	0	0	0
Recoveries	1	1	2	2
Balance	1,055	1,181	1,055	1,181
Commercial Real Estate Portfolio Segment [Member]
Balance	4,078	4,173	4,114	3,920
Provision (credit) for credit losses - loans	136	14	100	267
Charge-offs	0	0	0	0
Recoveries	0	0	0	0
Balance	4,214	4,187	4,214	4,187
Consumer Portfolio Segment [Member]
Balance	69	77	77	79
Provision (credit) for credit losses - loans	(3)	(4)	2	15
Charge-offs	(1)	(4)	(15)	(25)
Recoveries	0	8	1	8
Balance	65	77	65	77
Commercial Portfolio Segment [Member]
Balance	299	503	290	466
Provision (credit) for credit losses - loans	(4)	(110)	5	(73)
Charge-offs	0	0	0	0
Recoveries	0	0	0	0
Balance	$ 295	$ 393	$ 295	$ 393