Stockholders' Equity (Tables)

12 Months Ended

May 03, 2015

Schedule of Common Stock Subject to Future Issuance

Common stock subject to future issuance as of May 3, 2015 is as follows:



Exercise of outstanding stock options	2,283,162
Vesting of restricted stock awards	6,611,614
Available for grant under employee stock incentive plan	13,023,873
Available for grant under employee stock purchase plan	4,249,965
Total	26,168,614

Schedule of Stock Options

Stock Options



	Number of Shares		Weighted-Average Exercise Price
Stock options outstanding as of April 27, 2014	2,621,844		$	14.28
Stock options exercised	(299,517	)	$	10.27
Stock options canceled	(39,165	)	$	23.61
Stock options outstanding as of May 3, 2015	2,283,162		$	14.64

Schedule of Restricted Stock Units

Restricted Stock Units



	Number of Shares		Weighted-Average Grant-Date Fair Value
RSUs unvested as of April 27, 2014	6,516,317		$	15.44
RSUs granted	2,831,517		$	19.55
RSUs vested	(2,350,245	)	$	15.42
RSUs forfeited	(385,975	)	$	17.04
RSUs unvested as of May 3, 2015	6,611,614		$	17.12

Schedule of Share-Based Compensation Expense

The following table sets forth the detailed allocation of the share-based compensation expense for the fiscal years ended May 3, 2015, April 27, 2014 and April 28, 2013 which was reflected in the Company’s operating results (in thousands):



	Fiscal Years Ended
Share-based compensation expense by caption:	May 3, 2015		April 27, 2014		April 28, 2013
Cost of revenues	$	9,908	$	8,261	$	6,915
Research and development	17,764		14,660		10,970
Sales and marketing	6,251		5,083		3,743
General and administrative	10,677		9,962		10,333
Total	$	44,600	$	37,966	$	31,961



	Fiscal Years Ended
Share-based compensation expense by type of award:	May 3, 2015		April 27, 2014		April 28, 2013
Stock options	$	—	$	693	$	1,892
RSUs	41,729		34,506		26,794
Employee stock purchase rights under ESPP	2,871		2,767		3,275
Total	$	44,600	$	37,966	$	31,961

Schedule of Employee Stock Purchase Plan Valuation Assumptions

The fair value of employee stock purchase rights granted under the ESPP in fiscal 2015, 2014 and 2013 was estimated at the date of grant using the Black-Scholes option-pricing model with the following weighted-average assumptions:



	Fiscal Years Ended
	May 3, 2015		April 27, 2014		April 28, 2013
Expected term (in years)	0.75		0.75		0.75
Volatility	34% - 53%		40% - 47%		50% - 53%
Risk-free interest rate	0.07 - 0.21%		0.01 - 0.13%		0.10 - 0.15%
Dividend yield	—	%	—	%	—	%