Revenue From Contracts With Customers - Summary of Sources of Revenue from Contracts with Customers (Detail) - USD ($)		3 Months Ended		9 Months Ended
		Mar. 31, 2022	Mar. 31, 2021	Mar. 31, 2022	Mar. 31, 2021
Noninterest income
Service charges on deposits		$ 222,000	$ 173,000	$ 604,000	$ 531,000
Interchange fees		139,000	128,000	459,000	392,000
Other fees and service charges	[1]	29,000	52,000	135,000	115,000
Fees and service charges		390,000	353,000	1,198,000	1,038,000
Bank-owned life insurance	[1]	185,000	120,000	568,000	381,000
Gain on sale of premises	[1]			548,000
Swap income	[1]	333,000		333,000	367,000
Gains on sales of loans receivable	[1]	9,000		56,000
Gains on sales of securities	[1]		113,000		113,000
Other	[1]	6,000	6,000	28,000	30,000
Total noninterest income		$ 923,000	$ 592,000	$ 2,731,000	$ 1,929,000

[1] Not within the scope of ASC 606.