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Nature of Operations and Summary of Significant Accounting Policies - Additional Information (Detail)	12 Months Ended
	Jun. 30, 2021 USD ($) Banking_Office	Jun. 30, 2020 USD ($)
Federal Home Loan Bank, Advances, Branch of FHLB Bank [Line Items]
Number Of Full Service Banking Offices | Banking_Office	7
Interest-bearing deposits, maturity period (in months)	3 years
Liquid investments with original maturity period	3 months
Accrual of interest on loans due discontinued period, in days	90 days
Percentage of minimum likelihood of realized tax benefit upon settlement	50.00%
Cash, Uninsured Amount	$ 260,000
Long-Lived Asset Impairment	$ 0	$ 0
Sales [Member]
Federal Home Loan Bank, Advances, Branch of FHLB Bank [Line Items]
Percentage of major customer revenues	10.00%

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Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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