Note 4 - Loans, Allowance for Credit Losses and Credit Quality - Schedule of Loans Age Analysis (Details) - USD ($) $ in Thousands	Mar. 31, 2026	Dec. 31, 2025
Total loans, gross	$ 1,402,656	$ 1,382,864
Total loans,90 days past due and accruing	0	0
Total loans, nonaccrual	1,230	1,139
Financial Asset, 30 to 59 Days Past Due [Member]
Total loans, gross	715	1,135
Financial Asset, 60 to 89 Days Past Due [Member]
Total loans, gross	871	104
Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Total loans, gross	203	3
Financial Asset, Past Due [Member]
Total loans, gross	1,789	1,242
Financial Asset, Not Past Due [Member]
Total loans, gross	1,400,867	1,381,622
Real Estate Portfolio Segment [Member] \| One-to-four Family Residential Loan [Member]
Total loans, gross	491,460	473,394
Total loans,90 days past due and accruing	0	0
Total loans, nonaccrual	1,090	1,096
Real Estate Portfolio Segment [Member] \| One-to-four Family Residential Loan [Member] \| Financial Asset, 30 to 59 Days Past Due [Member]
Total loans, gross	61	519
Real Estate Portfolio Segment [Member] \| One-to-four Family Residential Loan [Member] \| Financial Asset, 60 to 89 Days Past Due [Member]
Total loans, gross	871	104
Real Estate Portfolio Segment [Member] \| One-to-four Family Residential Loan [Member] \| Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Total loans, gross	103	0
Real Estate Portfolio Segment [Member] \| One-to-four Family Residential Loan [Member] \| Financial Asset, Past Due [Member]
Total loans, gross	1,035	623
Real Estate Portfolio Segment [Member] \| One-to-four Family Residential Loan [Member] \| Financial Asset, Not Past Due [Member]
Total loans, gross	490,425	472,771
Real Estate Portfolio Segment [Member] \| Multifamily Loan [Member]
Total loans, gross	421,085	425,428
Total loans,90 days past due and accruing	0	0
Total loans, nonaccrual	0	0
Real Estate Portfolio Segment [Member] \| Multifamily Loan [Member] \| Financial Asset, 30 to 59 Days Past Due [Member]
Total loans, gross	0	0
Real Estate Portfolio Segment [Member] \| Multifamily Loan [Member] \| Financial Asset, 60 to 89 Days Past Due [Member]
Total loans, gross	0	0
Real Estate Portfolio Segment [Member] \| Multifamily Loan [Member] \| Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Total loans, gross	0	0
Real Estate Portfolio Segment [Member] \| Multifamily Loan [Member] \| Financial Asset, Past Due [Member]
Total loans, gross	0	0
Real Estate Portfolio Segment [Member] \| Multifamily Loan [Member] \| Financial Asset, Not Past Due [Member]
Total loans, gross	421,085	425,428
Real Estate Portfolio Segment [Member] \| Commercial Loan [Member]
Total loans, gross	335,381	336,412
Total loans,90 days past due and accruing	0	0
Total loans, nonaccrual	0	0
Real Estate Portfolio Segment [Member] \| Commercial Loan [Member] \| Financial Asset, 30 to 59 Days Past Due [Member]
Total loans, gross	418	246
Real Estate Portfolio Segment [Member] \| Commercial Loan [Member] \| Financial Asset, 60 to 89 Days Past Due [Member]
Total loans, gross	0	0
Real Estate Portfolio Segment [Member] \| Commercial Loan [Member] \| Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Total loans, gross	0	0
Real Estate Portfolio Segment [Member] \| Commercial Loan [Member] \| Financial Asset, Past Due [Member]
Total loans, gross	418	246
Real Estate Portfolio Segment [Member] \| Commercial Loan [Member] \| Financial Asset, Not Past Due [Member]
Total loans, gross	334,963	336,166
Real Estate Portfolio Segment [Member] \| Home Equity Loan [Member]
Total loans, gross	52,173	49,866
Total loans,90 days past due and accruing	0	0
Total loans, nonaccrual	140	43
Real Estate Portfolio Segment [Member] \| Home Equity Loan [Member] \| Financial Asset, 30 to 59 Days Past Due [Member]
Total loans, gross	236	370
Real Estate Portfolio Segment [Member] \| Home Equity Loan [Member] \| Financial Asset, 60 to 89 Days Past Due [Member]
Total loans, gross	0	0
Real Estate Portfolio Segment [Member] \| Home Equity Loan [Member] \| Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Total loans, gross	100	3
Real Estate Portfolio Segment [Member] \| Home Equity Loan [Member] \| Financial Asset, Past Due [Member]
Total loans, gross	336	373
Real Estate Portfolio Segment [Member] \| Home Equity Loan [Member] \| Financial Asset, Not Past Due [Member]
Total loans, gross	51,837	49,493
Real Estate Portfolio Segment [Member] \| Construction Loans [Member]
Total loans, gross	94,531	88,957
Total loans,90 days past due and accruing	0	0
Total loans, nonaccrual	0	0
Real Estate Portfolio Segment [Member] \| Construction Loans [Member] \| Financial Asset, 30 to 59 Days Past Due [Member]
Total loans, gross	0	0
Real Estate Portfolio Segment [Member] \| Construction Loans [Member] \| Financial Asset, 60 to 89 Days Past Due [Member]
Total loans, gross	0	0
Real Estate Portfolio Segment [Member] \| Construction Loans [Member] \| Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Total loans, gross	0	0
Real Estate Portfolio Segment [Member] \| Construction Loans [Member] \| Financial Asset, Past Due [Member]
Total loans, gross	0	0
Real Estate Portfolio Segment [Member] \| Construction Loans [Member] \| Financial Asset, Not Past Due [Member]
Total loans, gross	94,531	88,957
Other Portfolio Segment [Member] \| Commercial Loan [Member]
Total loans, gross	7,861	7,938
Total loans,90 days past due and accruing	0	0
Total loans, nonaccrual	0	0
Other Portfolio Segment [Member] \| Commercial Loan [Member] \| Financial Asset, 30 to 59 Days Past Due [Member]
Total loans, gross	0	0
Other Portfolio Segment [Member] \| Commercial Loan [Member] \| Financial Asset, 60 to 89 Days Past Due [Member]
Total loans, gross	0	0
Other Portfolio Segment [Member] \| Commercial Loan [Member] \| Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Total loans, gross	0	0
Other Portfolio Segment [Member] \| Commercial Loan [Member] \| Financial Asset, Past Due [Member]
Total loans, gross	0	0
Other Portfolio Segment [Member] \| Commercial Loan [Member] \| Financial Asset, Not Past Due [Member]
Total loans, gross	7,861	7,938
Other Portfolio Segment [Member] \| Consumer Loan [Member]
Total loans, gross	165	869
Total loans,90 days past due and accruing	0	0
Total loans, nonaccrual	0	0
Other Portfolio Segment [Member] \| Consumer Loan [Member] \| Financial Asset, 30 to 59 Days Past Due [Member]
Total loans, gross	0	0
Other Portfolio Segment [Member] \| Consumer Loan [Member] \| Financial Asset, 60 to 89 Days Past Due [Member]
Total loans, gross	0	0
Other Portfolio Segment [Member] \| Consumer Loan [Member] \| Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Total loans, gross	0	0
Other Portfolio Segment [Member] \| Consumer Loan [Member] \| Financial Asset, Past Due [Member]
Total loans, gross	0	0
Other Portfolio Segment [Member] \| Consumer Loan [Member] \| Financial Asset, Not Past Due [Member]
Total loans, gross	$ 165	$ 869

Note 4 - Loans, Allowance for Credit Losses and Credit Quality - Schedule of Loans Age Analysis (Details) - USD ($)
$ in Thousands

Mar. 31, 2026

Dec. 31, 2025

Total loans, gross

$ 1,402,656

$ 1,382,864

Total loans,90 days past due and accruing

Total loans, nonaccrual

1,230

1,139

Financial Asset, 30 to 59 Days Past Due [Member]

Total loans, gross