Leases - Summary of Supplemental Balance Sheet Information Related to Leases (Detail) $ in Thousands	Jun. 30, 2019 USD ($)
Leases [Abstract]
Lease right-of-use asset, Non-current	$ 12,316
Operating lease liability, Current	$ 3,004
Operating Lease, Liability, Current, Statement of Financial Position [Extensible List]	us-gaap:AccruedLiabilitiesAndOtherLiabilities
Operating lease liabilty, Non-current	$ 10,204
Operating lease, Weighted Average Remaining Lease Term	3 years 9 months 18 days
Operating lease, Weighted Average Discount Rate	6.61%