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Equity Incentive Plans - (Tables)
 6 Months Ended
Aug. 02, 2020
Share-based Payment Arrangement [Abstract]  
Equity Incentive Plans
A summary of the 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 at the end of fiscal 202026,822,243 $8.97 3.9$237,803 
Options exercised(4,312,894)5.01   
Options forfeited(125,685)16.54   
Balance at the end of the second quarter of fiscal 2021
22,383,664 $9.70 4.2$183,708 
Vested and exercisable at the end of the second quarter of fiscal 2021
20,369,881 $9.06 4.1$179,477 
Restricted Stock Units and Performance Restricted Stock Units
A summary of the RSU and PRSU activity under our 2015 Plan and related information is as follows:
 Number of
RSUs and PRSUs Outstanding		Weighted-
Average
Grant Date
Fair Value		Aggregate
Intrinsic
Value (in thousands)
Unvested balance at the end of fiscal 202025,434,597 $18.72 $452,736 
Granted14,461,995 11.27 
Vested(5,454,940)16.93 
Forfeited(1,643,740)17.34 
Unvested balance at the end of the second quarter of fiscal 2021
32,797,912 $15.80 $585,770 
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 at the end of fiscal 20202,127,206 $19.58 $37,684 
Vested(787,698)19.54 
Forfeited/canceled(229,605)20.15 
Unvested balance at the end of the second quarter of fiscal 2021
1,109,903 $19.49 $19,823 
Stock-Based Compensation
The following table summarizes the components of stock-based compensation expense recognized in the condensed consolidated statements of operations (in thousands):
 
 
Second Quarter of Fiscal
First Two Quarters of Fiscal
 2020202120202021
Cost of revenue—product$954 $990 $1,931 $1,986 
Cost of revenue—subscription services3,633 3,686 7,584 7,078 
Research and development
29,108 29,839 57,353 58,550 
Sales and marketing16,055 16,848 34,369 33,120 
General and administrative8,654 10,089 19,324 19,412 
Total stock-based compensation expense$58,404 $61,452 $120,561 $120,146