Commitments and Contingencies - Additional Information (Detail) - USD ($)	3 Months Ended		9 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Mar. 31, 2019	Mar. 31, 2018	Jun. 30, 2018
Commitments And Contingencies [Line Items]
Rent expense for office space	$ 900,000	$ 800,000	$ 2,900,000	$ 2,400,000
Leases expiration year			2026
Estimated fair value of indemnification agreements	0		$ 0		$ 0
Estimated fair value of indemnity provisions	0		0		$ 0
Letter of credit agreement with a financial institution that is used as collateral for fidelity bonds placed with an insurance company	400,000		400,000
Letter of credit agreement with a financial institution that is used as collateral for the Company's corporate headquarters' operating lease	500,000		$ 500,000
Letters of credit automatically renew annually without amendment on the annual expiration date			30 days
Unsecured Revolving Promissory Note [Member]
Commitments And Contingencies [Line Items]
Promissory note, principal amount		$ 2,500,000		$ 2,500,000
Promissory note, accrued interest rate percentage		6.00%
Promissory note, frequency of periodic interest receipts			Monthly
Promissory note, outstanding principal balance	$ 0		$ 0
Promissory note, expiration date			Jan. 01, 2019