Note 4 - Loans, Allowance for Credit Losses and Credit Quality - Schedule of Loans Age Analysis (Details) - USD ($) $ in Thousands	Jun. 30, 2025	Dec. 31, 2024
Total loans, gross	$ 1,292,324	$ 1,145,835
Total loans,90 days past due and accruing	0	0
Total loans, nonaccrual	1,286	1,957
Financial Asset, 30 to 59 Days Past Due [Member]
Total loans, gross	1,450	1,665
Financial Asset, 60 to 89 Days Past Due [Member]
Total loans, gross	490	0
Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Total loans, gross	118	1,162
Financial Asset, Past Due [Member]
Total loans, gross	2,058	2,827
Financial Asset, Not Past Due [Member]
Total loans, gross	1,290,266	1,143,008
Real Estate Portfolio Segment [Member] \| One-to-four Family Residential Loan [Member]
Total loans, gross	448,473	422,841
Total loans,90 days past due and accruing	0	0
Total loans, nonaccrual	982	1,872
Real Estate Portfolio Segment [Member] \| One-to-four Family Residential Loan [Member] \| Financial Asset, 30 to 59 Days Past Due [Member]
Total loans, gross	57	1,260
Real Estate Portfolio Segment [Member] \| One-to-four Family Residential Loan [Member] \| Financial Asset, 60 to 89 Days Past Due [Member]
Total loans, gross	490	0
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	106	1,077
Real Estate Portfolio Segment [Member] \| One-to-four Family Residential Loan [Member] \| Financial Asset, Past Due [Member]
Total loans, gross	653	2,337
Real Estate Portfolio Segment [Member] \| One-to-four Family Residential Loan [Member] \| Financial Asset, Not Past Due [Member]
Total loans, gross	447,820	420,504
Real Estate Portfolio Segment [Member] \| Multifamily Loan [Member]
Total loans, gross	385,845	343,970
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	1,313	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	1,313	0
Real Estate Portfolio Segment [Member] \| Multifamily Loan [Member] \| Financial Asset, Not Past Due [Member]
Total loans, gross	384,532	343,970
Real Estate Portfolio Segment [Member] \| Commercial Loan [Member]
Total loans, gross	309,990	228,991
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	0	0
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	0	0
Real Estate Portfolio Segment [Member] \| Commercial Loan [Member] \| Financial Asset, Not Past Due [Member]
Total loans, gross	309,990	228,991
Real Estate Portfolio Segment [Member] \| Home Equity Loan [Member]
Total loans, gross	47,586	45,154
Total loans,90 days past due and accruing	0	0
Total loans, nonaccrual	304	85
Real Estate Portfolio Segment [Member] \| Home Equity Loan [Member] \| Financial Asset, 30 to 59 Days Past Due [Member]
Total loans, gross	80	405
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	12	85
Real Estate Portfolio Segment [Member] \| Home Equity Loan [Member] \| Financial Asset, Past Due [Member]
Total loans, gross	92	490
Real Estate Portfolio Segment [Member] \| Home Equity Loan [Member] \| Financial Asset, Not Past Due [Member]
Total loans, gross	47,494	44,664
Real Estate Portfolio Segment [Member] \| Construction Loans [Member]
Total loans, gross	87,211	90,894
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	87,211	90,894
Other Portfolio Segment [Member] \| Commercial Loan [Member]
Total loans, gross	12,330	13,844
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	12,330	13,844
Other Portfolio Segment [Member] \| Consumer Loan [Member]
Total loans, gross	889	141
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	$ 889	$ 141

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

Jun. 30, 2025

Dec. 31, 2024

Total loans, gross

$ 1,292,324

$ 1,145,835

Total loans,90 days past due and accruing

Total loans, nonaccrual

1,286

1,957

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

Total loans, gross