Commitments and Contingencies - Summary of Future Commitment Maturity Schedules (Details) $ in Thousands	Jul. 31, 2017 USD ($)
Financing Arrangements
Remainder of 2018	$ 289
2019	212
2020	0
2021	0
2022	0
Thereafter	0
Total minimum lease payments	501
Less: amount representing interest	(35)
Present value of minimum lease payments	466
Operating Leases
Remainder of 2018	5,772
2019	11,902
2020	8,496
2021	5,108
2022	4,725
Thereafter	10,449
Total minimum lease payments	46,452
Purchase Obligations
Remainder of 2018	5,095
2019	10,301
2020	10,301
2021	4,167
2022	0
Thereafter	0
Total minimum lease payments	29,864
Total
Remainder of 2018	11,156
2019	22,415
2020	18,797
2021	9,275
2022	4,725
Thereafter	10,449
Total minimum lease payments	76,817
Present value of minimum lease payments	$ 76,782