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Loans and Allowance for Credit Losses - Categories of Loans (Detail) - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022	Jun. 30, 2022	Mar. 31, 2022	Dec. 31, 2021	Jun. 30, 2021
Real estate loans
Total loans	$ 585,814		$ 525,736	$ 505,712
Unearned fees and discounts, net	(232)		(247)
Allowance for credit losses	7,535	$ 7,166	7,052	6,611	$ 6,395	$ 6,599
Loans, net	578,511		518,931
One- to four-family [Member]
Real estate loans
Total loans	158,388		132,474
Multi-family [Member]
Real estate loans
Total loans	98,891		88,247	88,566
Allowance for credit losses	1,285	1,402	1,375	1,427	1,400	1,674
Home equity lines of credit [Member]
Real estate loans
Total loans	7,058		6,987	6,600
Allowance for credit losses	98	101	70	66	62	67
Construction [Member]
Real estate loans
Total loans	42,881		41,254	31,127
Allowance for credit losses	686	585	489	359	299	258
Commercial [Member]
Real estate loans
Total loans	198,976		167,375	165,132
Allowance for credit losses	2,510	2,392	1,985	1,966	1,962	1,831
Commercial [Member]
Real estate loans
Total loans	71,129		80,418	81,399
Allowance for credit losses	889	871	2,025	1,679	1,521	1,740
Consumer [Member]
Real estate loans
Total loans	8,491		8,981	8,298
Allowance for credit losses	$ 77	$ 93	$ 80	$ 71	$ 69	$ 62

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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