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Loans and Allowance for Credit Losses - Categories of Loans (Detail) - USD ($) $ in Thousands	Mar. 31, 2025	Dec. 31, 2024	Jun. 30, 2024	Mar. 31, 2024	Dec. 31, 2023	Jun. 30, 2023
Real estate loans
Total loans	$ 644,944		$ 646,389	$ 650,681
Unearned fees and discounts, net	(343)		(407)
Allowance for credit losses	7,094	$ 7,346	7,499	7,725	$ 7,935	$ 7,139
Loans, net	638,193		639,297
One- to four-family [Member]
Real estate loans
Total loans	176,143		177,263	176,117
Allowance for credit losses	1,600	1,579	1,774	1,828	1,809	1,898
Multi-family [Member]
Real estate loans
Total loans	124,002		126,031	127,757
Allowance for credit losses	1,488	1,681	1,764	1,789	1,865	1,121
Home equity lines of credit [Member]
Real estate loans
Total loans	10,014		9,859	9,602
Allowance for credit losses	134	134	148	147	147	121
Construction [Member]
Real estate loans
Total loans	27,213		33,708	41,342
Allowance for credit losses	245	298	337	537	539	765
Commercial [Member]
Real estate loans
Total loans	207,656		200,017	198,823
Allowance for credit losses	2,440	2,378	2,358	2,313	2,593	2,369
Commercial [Member]
Real estate loans
Total loans	93,724		91,784	89,383
Allowance for credit losses	1,132	1,216	1,053	1,045	915	794
Consumer [Member]
Real estate loans
Total loans	6,192		7,727	7,657
Allowance for credit losses	$ 55	$ 60	$ 65	$ 66	$ 67	$ 71

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Amount of unamortized loan commitment, origination, and other costs (fees) and purchase premium (discount) on financing receivable recognized as adjustment to yield. Excludes financing receivable covered under loss sharing agreement.

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