Nature of Operations and Summary of Significant Accounting Policies - Additional Information (Detail)	12 Months Ended
Jun. 30, 2020 Banking_Office
Federal Home Loan Bank, Advances, Branch of FHLB Bank [Line Items]
Number Of Full Service Banking Offices	7
Interest-bearing deposits, maturity period (in months)	5 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%
Sales [Member]
Federal Home Loan Bank, Advances, Branch of FHLB Bank [Line Items]
Percentage of major customer revenues	10.00%

For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.

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