Commitments and Contingencies - Future Lease Payments under Operating Leases and Sublease Income (Detail) $ in Thousands	Jun. 30, 2018 USD ($)
Operating Lease Payments
2019	$ 9,071
2020	9,787
2021	9,981
2022	10,290
2023	10,159
Thereafter	37,734
Total	87,022
Sublease Income
2019	(248)
2020	(133)
2021	(10)
2022	0
2023	0
Thereafter	0
Total	$ (391)