Commitments and Contingencies - Capital Leases (Details) $ in Thousands	Apr. 30, 2016 USD ($)
Commitments and Contingencies Disclosure [Abstract]
Remaining nine months of fiscal 2017	$ 4,703
Fiscal 2018	11,683
Fiscal 2019	12,510
Fiscal 2020	12,886
Fiscal 2021	13,272
Fiscal 2022	13,670
Thereafter	21,977
Total future minimum lease payments	$ 90,701