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Loans and Allowance for Loan Losses - Categories of Loans (Detail) - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021	Jun. 30, 2021	Mar. 31, 2021	Dec. 31, 2020	Jun. 30, 2020
Real estate loans
Total loans	$ 505,712		$ 520,526	$ 511,318
Unearned fees and discounts, net	(729)		556
Allowance for loan losses	6,611	$ 6,395	6,599	6,351	$ 6,449	$ 6,234
Loans, net	499,830		513,371
One- to four-family [Member]
Real estate loans
Total loans	124,590		117,435	116,363
Allowance for loan losses	1,043	1,082	967	955	1,011	1,044
Multi-family [Member]
Real estate loans
Total loans	88,566		104,433	105,895
Allowance for loan losses	1,427	1,400	1,674	1,741	1,744	1,514
Home equity lines of credit [Member]
Real estate loans
Total loans	6,600		6,688	7,814
Allowance for loan losses	66	62	67	79	79	87
Construction [Member]
Real estate loans
Total loans	31,127		25,345	20,783
Allowance for loan losses	359	299	258	199	130	240
Commercial [Member]
Real estate loans
Total loans	165,132		155,884	149,639
Allowance for loan losses	1,966	1,962	1,831	1,758	1,782	1,706
Commercial [Member]
Real estate loans
Total loans	81,399		103,088	103,326
Allowance for loan losses	1,679	1,521	1,740	1,560	1,636	1,583
Consumer [Member]
Real estate loans
Total loans	8,298		7,653	7,498
Allowance for loan losses	$ 71	$ 69	$ 62	$ 59	$ 67	$ 60

X

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Amount of allowance to cover probable credit losses on loans and leases. Includes carryover of or adjustments to the allowance for loan losses in connection with business combinations. Excludes allowance for loans and leases covered under loss sharing agreements.

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Amount of deferred interest and fee income, unamortized costs incurred to originate loans and leases, unamortized loan commitments and loan syndication fees, and premiums over or discounts from face amounts of acquired loans. Excludes amounts for loans and leases covered under loss sharing agreements.

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