Loans - Schedule of Composition of the Loan Portfolio, Excluding Loans Held-for-sale (Details) - USD ($) $ in Thousands	Mar. 31, 2025	Dec. 31, 2024	Mar. 31, 2024	Dec. 31, 2023
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans held-for-portfolio	$ 887,847	$ 901,827
Premiums for purchased loans	688	718
Deferred fees, net	(2,309)	(2,374)
Total	886,226	900,171
Allowance for credit losses — loans	(8,393)	(8,499)	$ (8,598)	$ (8,760)
Total loans held-for-portfolio, net	877,833	891,672
Real estate loans:
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans held-for-portfolio	725,859	740,963
Real estate loans: | One-to-four family:
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans held-for-portfolio	262,457	269,684
Premiums for purchased loans	386	404
Total	262,578	269,809
Allowance for credit losses — loans	(3,328)	(3,025)	(2,910)	(2,630)
Real estate loans: | Home equity:
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans held-for-portfolio	28,112	26,686
Total	28,326	26,896
Allowance for credit losses — loans	(362)	(307)	(179)	(185)
Real estate loans: | Commercial and multifamily:
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans held-for-portfolio	392,798	371,516
Premiums for purchased loans	236	244
Total	391,537	370,282
Allowance for credit losses — loans	(1,181)	(1,218)	(1,106)	(1,070)
Real estate loans: | Construction and land:
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans held-for-portfolio	42,492	73,077
Total	42,279	72,812
Allowance for credit losses — loans	(279)	(992)	(1,329)	(1,349)
Consumer loans:
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans held-for-portfolio	147,298	145,259
Consumer loans: | Manufactured homes:
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans held-for-portfolio	42,448	41,128
Total	42,301	40,980
Allowance for credit losses — loans	(1,303)	(1,172)	(833)	(971)
Consumer loans: | Floating homes:
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans held-for-portfolio	86,626	86,411
Total	86,211	85,990
Allowance for credit losses — loans	(1,409)	(1,282)	(1,799)	(2,022)
Consumer loans: | Other consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans held-for-portfolio	18,224	17,720
Total	18,244	17,738
Allowance for credit losses — loans	(448)	(401)	(333)	(426)
Commercial business loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans held-for-portfolio	14,690	15,605
Premiums for purchased loans	66	70
Total	14,750	15,664
Allowance for credit losses — loans	$ (83)	$ (102)	$ (109)	$ (107)