Summary of Significant Accounting Policies - Additional Information (Detail) - USD ($)	3 Months Ended		6 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2017	Dec. 31, 2016	Dec. 21, 2017
Significant Accounting Policies [Line Items]
Purchase agreement, maximum receivable balances					$ 30,000,000
Accounts receivable and incurred factoring fees	$ 18,821,000		$ 69,000
Multiple Delivery Revenue [Member]
Significant Accounting Policies [Line Items]
Percentage Of revenue recognized	37.00%	23.00%	38.00%	29.00%