Loans, Allowance for Credit Losses and Credit Quality - Schedule of Loans (Details) - USD ($) $ in Thousands	Jun. 30, 2024		Mar. 31, 2024	Dec. 31, 2023	Jun. 30, 2023	[1]	Mar. 31, 2023	Dec. 31, 2022
Accounts Notes And Loans Receivable [Line Items]
Total loans, gross	$ 1,112,316			$ 1,048,606
Net deferred loan fees	(405)			(226)
Allowance for credit losses	(9,025)	[1]	$ (8,670)	(8,591)	$ (8,470)		$ (8,257)	$ (7,200)
Total loans, net	$ 1,102,886			$ 1,039,789
Total loans, gross percent	100.00%			100.00%
Real Estate Loans | Home Equity Lines of Credit and Loans
Accounts Notes And Loans Receivable [Line Items]
Total loans, gross	$ 38,017			$ 33,357
Allowance for credit losses	$ (363)	[1]	(319)	$ (321)	(203)		(186)	(194)
Total loans, gross percent	3.40%			3.20%
Real Estate Loans | One-to Four Family Residential
Accounts Notes And Loans Receivable [Line Items]
Total loans, gross	$ 418,271			$ 410,131
Total loans, gross percent	37.60%			39.10%
Real Estate Loans | Multi Family
Accounts Notes And Loans Receivable [Line Items]
Total loans, gross	$ 316,170			$ 287,361
Allowance for credit losses	$ (1,304)	[1]	(1,283)	$ (1,190)	(2,150)		(2,075)	(1,839)
Total loans, gross percent	28.40%			27.40%
Real Estate Loans | Commercial Real Estate Loans
Accounts Notes And Loans Receivable [Line Items]
Total loans, gross	$ 210,948			$ 196,365
Allowance for credit losses	$ (1,740)	[1]	(1,672)	$ (1,636)	(2,348)		(2,330)	(1,797)
Total loans, gross percent	19.00%			18.70%
Real Estate Loans | Construction
Accounts Notes And Loans Receivable [Line Items]
Total loans, gross	$ 114,583			$ 112,000
Allowance for credit losses	$ (1,814)	[1]	(1,681)	$ (1,757)	(1,570)		(1,491)	(1,286)
Total loans, gross percent	10.30%			10.70%
Other Loans | Commercial
Accounts Notes And Loans Receivable [Line Items]
Total loans, gross	$ 14,184			$ 9,219
Allowance for credit losses	$ (199)	[1]	(203)	$ (131)	(218)		(213)	(60)
Total loans, gross percent	1.30%			0.90%
Other Loans | Consumer
Accounts Notes And Loans Receivable [Line Items]
Total loans, gross	$ 143			$ 173
Allowance for credit losses	$ (1)	[1]	$ (1)	$ (1)	$ (1)		$ (1)	$ (1)
Total loans, gross percent	0.00%			0.00%

[1] (1) Balances of accrued interest receivable excluded from amortized cost and the calculation of allowance for credit losses amounted to $3.6 million and $2.7 million as of June 30, 2024 and June 30, 2023.