Balance Sheet Components - Summary of Accrued Expenses and Other Current Liabilities (Detail) - USD ($) $ in Thousands	Jul. 31, 2016	Jul. 31, 2015
Payables and Accruals [Abstract]
Accrued bonuses and commissions	$ 3,300	$ 3,243
Accrued sales, service and income taxes	3,085	2,291
Accrued payroll and benefits	1,375	1,702
Other	3,487	2,560
Accrued expenses and other current liabilities, net	$ 11,247	$ 9,796