Activity in Restructuring Accrual (Detail) $ in Thousands	9 Months Ended
	Apr. 30, 2016 USD ($)
Restructuring Cost and Reserve [Line Items]
Accrued restructuring, beginning balance	$ 1,528
Restructuring charges	1,555
Restructuring adjustments	(126)
Cash paid	(2,521)
Non-cash adjustments	18
Accrued restructuring, ending balance	454
Employee Related Expenses
Restructuring Cost and Reserve [Line Items]
Accrued restructuring, beginning balance	1,437
Restructuring charges	1,274
Restructuring adjustments	(125)
Cash paid	(2,167)
Non-cash adjustments	15
Accrued restructuring, ending balance	434
Contractual Obligations
Restructuring Cost and Reserve [Line Items]
Accrued restructuring, beginning balance	91
Restructuring charges	281
Restructuring adjustments	(1)
Cash paid	(354)
Non-cash adjustments	3
Accrued restructuring, ending balance	$ 20