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Note 8 - Loans Receivable, Net - Loans Receivable (Details) - USD ($) $ in Thousands	Jun. 30, 2023	Mar. 31, 2023	Dec. 31, 2022	Jun. 30, 2022	Mar. 31, 2022	Dec. 31, 2021
Loans receivable	$ 839,073		$ 787,887
Unamortized discounts	15		13
Net deferred loan fees	609		519
Allowance for credit losses	11,517	$ 11,342	10,277	$ 9,644	$ 9,584	$ 9,279
Total loans receivable, net	826,932		777,078
Residential Portfolio Segment [Member]
Loans receivable	247,070		205,890
Allowance for credit losses	1,243	959	1,261	1,068	1,002	974
Commercial Real Estate Portfolio Segment [Member]
Loans receivable	483,400		471,345
Allowance for credit losses	7,865	7,561	7,026	6,586	6,495	6,388
Consumer Portfolio Segment [Member]
Loans receivable	47,352		44,817
Allowance for credit losses	582	620	1,058	1,047	991	981
Commercial Portfolio Segment [Member]
Loans receivable	61,251		65,835
Allowance for credit losses	1,827	$ 2,202	932	$ 943	$ 1,096	$ 936
Single Family Segment [Member] \| Residential Portfolio Segment [Member]
Loans receivable	247,070		205,890
Real Estate [Member] \| Commercial Real Estate Portfolio Segment [Member]
Loans receivable	260,214		249,783
Commercial Real Estate Other [Member] \| Commercial Real Estate Portfolio Segment [Member]
Loans receivable	$ 223,186		$ 221,562