EQUITY AWARD PLANS (Tables)

3 Months Ended

Oct. 31, 2017

Disclosure of Compensation Related Costs, Share-based Payments [Abstract]

The summary of RSU activity under the Stock Plans is as follows:



	Number of Shares		Grant Date Fair Value per Share
Outstanding—July 31, 2017	17,376,090		$	18.85
Granted	1,553,392		$	23.72
Released	(1,412,978	)	$	16.04
Canceled/forfeited	(771,957	)	$	23.58
Outstanding—October 31, 2017	16,744,547		$	19.32

Schedule of ESPP Valuation Assumptions

We use the Black-Scholes option-pricing model to determine the fair value of shares purchased under the 2016 ESPP with the following weighted-average assumptions on the date of grant:



	Three Months Ended October 31,
	2016		2017
Expected term (in years)	0.75		0.75
Risk-free interest rate	0.6	%	1.25	%
Volatility	50.6	%	50.2	%
Dividend yield	—	%	—	%

Schedule of Employee Service Share-based Compensation, Allocation of Recognized Period Costs

Total stock-based compensation expense recognized for stock awards in the consolidated statements of operations is as follows (in thousands):



	Three Months Ended October 31,
	2016		2017
	(in thousands)
Cost of revenue:
Product	$	966	$	570
Support and other services	3,350		2,072
Sales and marketing	33,891		13,766
Research and development	34,026		15,542
General and administrative	18,495		3,565
Total stock-based compensation expense	$	90,728	$	35,515