Summarized Financial Information of Net Revenue from External Customers by Group of Services (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jan. 31, 2018	Jan. 31, 2017	Jan. 31, 2018	Jan. 31, 2017
Segment Reporting, Revenue Reconciling Item [Line Items]
Net revenue	$ 151,119	$ 117,568	$ 253,641	$ 238,895
Supply Chain Services
Segment Reporting, Revenue Reconciling Item [Line Items]
Net revenue	87,947	110,954	184,688	224,886
e-Business Services
Segment Reporting, Revenue Reconciling Item [Line Items]
Net revenue	6,259	$ 6,614	12,040	$ 14,009
Direct Marketing
Segment Reporting, Revenue Reconciling Item [Line Items]
Net revenue	$ 56,913		$ 56,913