Business Combination - Additional Information (Detail) - USD ($)		12 Months Ended
	Jul. 10, 2020	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2019
Business Acquisition [Line Items]
Bargain purchase gain		$ 0	$ 3,053,000	$ 0
Finite-lived intangible assets, net		3,020,000	3,705,000	3,995,000	$ 5,160,000
Merger-related expenses		$ 0	4,349,000	951,000
MSB Financial Corporation [Member]
Business Acquisition [Line Items]
Closing date	Jul. 10, 2020
Cash paid for acquisition	$ 9,830,000
Issuance of shares of common stock to MSB stockholders in conjunction with merger	5,853,811
Bargain purchase gain	$ 3,053,000
Finite-lived intangible assets, net	$ 690,000
Business combination provisional adjustments			0
Merger-related expenses			$ 4,300,000	$ 951,000
MSB Financial Corporation [Member] | Core Deposits
Business Acquisition [Line Items]
Intangible asset, estimated useful life		10 years