Loans - Schedule of Composition of Loan Portfolio, Excluding Loans Held-for-sale (Details) - USD ($) $ in Thousands	Dec. 31, 2024	Dec. 31, 2023	Jan. 01, 2023	Dec. 31, 2022
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	$ 901,827	$ 896,160
Premiums for purchased loans	718	829
Deferred fees, net	(2,374)	(2,511)
Total loans, gross	900,171	894,478
Allowance for credit losses - loans	(8,499)	(8,760)	$ (8,359)	$ (7,599)
Total loans, net	891,672	885,718
Real estate loans:
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	740,963	744,559
Allowance for credit losses - loans			(7,075)	(5,613)
Real estate loans: | One- to four- family
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	269,684	279,448
Premiums for purchased loans	404	465
Total loans, gross	269,809	279,712
Allowance for credit losses - loans	(3,025)	(2,630)	(2,126)	(1,771)
Real estate loans: | Home equity
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	26,686	23,073
Total loans, gross	26,896	23,315
Allowance for credit losses - loans	(307)	(185)	(201)	(132)
Real estate loans: | Commercial and multifamily
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	371,516	315,280
Premiums for purchased loans	244	280
Total loans, gross	370,282	314,300
Allowance for credit losses - loans	(1,218)	(1,070)	(2,181)	(2,501)
Real estate loans: | Construction and land
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	73,077	126,758
Total loans, gross	72,812	125,976
Allowance for credit losses - loans	(992)	(1,349)	(2,568)	(1,209)
Consumer loans:
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	145,259	130,913
Allowance for credit losses - loans			(1,065)	(1,242)
Consumer loans: | Manufactured homes
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	41,128	36,193
Total loans, gross	40,980	36,085
Allowance for credit losses - loans	(1,172)	(971)	(282)	(462)
Consumer loans: | Floating homes
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	86,411	75,108
Total loans, gross	85,990	74,733
Allowance for credit losses - loans	(1,282)	(2,022)	(622)	(456)
Consumer loans: | Other consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	17,720	19,612
Total loans, gross	17,738	19,615
Allowance for credit losses - loans	(401)	(426)	(161)	(324)
Commercial business loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	15,605	20,688
Premiums for purchased loans	70	84
Total loans, gross	15,664	20,742
Allowance for credit losses - loans	$ (102)	$ (107)	$ (221)	$ (256)