Commitments and Contingencies - Summary of Future Commitment Maturity Schedules (Details) $ in Thousands	Oct. 31, 2017 USD ($)
Financing Arrangements
Remainder of 2018	$ 212
2019	212
2020	0
2021	0
2022	0
Thereafter	0
Total minimum lease payments	424
Less: amount representing interest	(29)
Present value of minimum lease payments	395
Operating Leases
Remainder of 2018	2,968
2019	12,343
2020	9,441
2021	6,088
2022	5,749
Thereafter	13,896
Total minimum lease payments	50,485
Purchase Obligations
Remainder of 2018	2,595
2019	10,401
2020	10,301
2021	4,167
2022	0
Thereafter	0
Total minimum lease payments	27,464
Total
Remainder of 2018	5,775
2019	22,956
2020	19,742
2021	10,255
2022	5,749
Thereafter	13,896
Total minimum lease payments	78,373
Present value of minimum lease payments	$ 78,344