Summary of Significant Accounting Policies - Schedule of Allowance for Credit Losses (Detail) $ in Thousands	9 Months Ended
	Mar. 31, 2021 USD ($)
Accounting Policies [Abstract]
Balance as of June 30, 2020	$ 9,287
Current period provision for credit losses	10
Write-offs charged against the allowance	(9,063)	[1]
Balance as of March 31, 2021	$ 234

[1] In the third quarter of fiscal year 2019, the Company recorded an allowance of $8.7 million for bad debt expense related to a large former education client who