Leases - Summary of Supplemental Balance Sheet Information Related to Leases (Detail) $ in Thousands	Oct. 31, 2019 USD ($)
Finance Leases:
Property and equipment, at cost	$ 4,586
Accumulated depreciation	(930)
Property and equipment, net	$ 3,656
Finance Lease, Right-of-Use Asset, Statement of Financial Position [Extensible List]	us-gaap:PropertyPlantAndEquipmentNet
Other accrued liabilities	$ 1,597
Finance Lease, Liability, Current, Statement of Financial Position [Extensible List]	us-gaap:OtherAccruedLiabilitiesCurrent
Other liabilities	$ 2,107
Finance Lease, Liability, Noncurrent, Statement of Financial Position [Extensible List]	us-gaap:OtherLiabilitiesNoncurrent
Total finance lease liabilities	$ 3,704
Weighted average remaining lease terms:
Operating leases	6 years
Finance leases	2 years 8 months 12 days
Weighted average discount rate:
Operating leases	4.90%
Finance leases	4.20%