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, 2017	Jan. 31, 2016	Jan. 31, 2017	Jan. 31, 2016
Segment Reporting, Revenue Reconciling Item [Line Items]
Net revenue	$ 117,568	$ 119,966	$ 238,895	$ 261,055
Supply Chain Services
Segment Reporting, Revenue Reconciling Item [Line Items]
Net revenue	110,954	111,340	224,886	243,225
e-Business Services
Segment Reporting, Revenue Reconciling Item [Line Items]
Net revenue	$ 6,614	$ 8,626	$ 14,009	$ 17,830