XML 38 R28.htm IDEA: XBRL DOCUMENT

Equity Incentive Plans (Tables)

3 Months Ended

Apr. 30, 2019

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

A summary of stock option activity under our equity incentive plans and related information is as follows:



	Options Outstanding
	Number of Shares		Weighted- Average Exercise Price		Weighted- Average Remaining Contractual Life (In Years)	Aggregate Intrinsic Value (in thousands)
Balance as of January 31, 2019	35,465,543		$	8.34	5.4	$	339,591
Options exercised	(3,207,763	)	5.23
Options forfeited/canceled	(128,013	)	16.37
Balance as of April 30, 2019	32,129,767		$	8.62	5.2	$	457,467
Vested and exercisable as of April 30, 2019	24,817,971		$	7.24	5.0	$	387,679

Restricted Stock Units

A summary of the RSU activity under our 2015 Plan and related information is as follows:



	Number of RSUs Outstanding		Weighted- Average Grant Date Fair Value		Aggregate Intrinsic Value (in thousands)
Unvested balance as of January 31, 2019	21,917,550		$	17.94	$	392,515
Granted	6,547,013		20.92
Vested	(2,076,099	)	15.25
Forfeited	(448,975	)	18.51
Unvested balance as of April 30, 2019	25,939,489		$	18.90	$	592,933

Restricted Stock

A summary of the restricted stock activity under our 2015 Plan and related information is as follows:



	Number of Restricted Stock Outstanding		Weighted- Average Grant Date Fair Value		Aggregate Intrinsic Value (in thousands)
Unvested balance as of January 31, 2019	2,267,569		$	18.70	$	40,612
Granted	1,338,972		20.48
Vested	(622,662	)	20.76
Unvested balance as of April 30, 2019	2,983,879		$	19.18	$	68,211

Stock-Based Compensation

The following table summarizes the components of stock-based compensation expense recognized in the condensed consolidated statements of operations (in thousands):



	Three Months Ended April 30,
	2018		2019
Cost of revenue—product	$	608	$	977
Cost of revenue—support subscription	2,684		3,951
Research and development	21,090		28,245
Sales and marketing	13,940		18,314
General and administrative	5,633		10,670
Total stock-based compensation expense	$	43,955	$	62,157