Restructuring, Net - Additional Information (Detail) $ in Thousands	9 Months Ended
	Apr. 30, 2018 USD ($)	Apr. 30, 2017 USD ($) Employee
Restructuring Cost and Reserve [Line Items]
Restructuring charges	$ 3
Number of workforce reduction | Employee		78
Employee Related Expenses
Restructuring Cost and Reserve [Line Items]
Restructuring charges	3	$ 1,900
Contractual Obligations
Restructuring Cost and Reserve [Line Items]
Restructuring charges		500
Americas | Employee Related Expenses
Restructuring Cost and Reserve [Line Items]
Restructuring charges	100	200
Asia | Employee Related Expenses
Restructuring Cost and Reserve [Line Items]
Restructuring charges		700
Europe | Employee Related Expenses
Restructuring Cost and Reserve [Line Items]
Restructuring charges		500
e-Business
Restructuring Cost and Reserve [Line Items]
Restructuring charges	$ 3
e-Business | Employee Related Expenses
Restructuring Cost and Reserve [Line Items]
Restructuring charges		$ 100