Commitments and Contingencies - Schedule of Non-Cancelable Minimum Payments Applicable to Operating and Capital Leases (Details) $ in Thousands	Jul. 31, 2017 USD ($)
Commitments And Contingencies Disclosure [Abstract]
Operating leases, due in one year	$ 1,324
Operating Leases, due in two years	966
Operating leases, due in three years	497
Operating leases, due in four years	350
Operating leases, due in five years	374
Operating leases, due thereafter	3,471
Operating leases, future minimum payments due	6,982
Capital leases, future minimum payments due, next twelve months	384
Capital leases, future minimum payments due in two years	244
Capital leases, future minimum payments due in three years	90
Capital leases, future minimum payments due in four years	15
Capital leases, future minimum payments due in five years	5
Capital leases, future minimum payments due thereafter	0
Capital leases, future minimum payments due	$ 738