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Equity Incentive Plans (Tables)
 6 Months Ended
Oct. 31, 2020
Share-based Payment Arrangement [Abstract]  
Summary of Equity Awards Available for Grant
The equity awards available for grant for the periods presented were as follows:
 Six Months Ended
October 31, 2020
Available at beginning of period12,461,850 
Awards authorized4,142,849 
Stock options granted(40,129)
Stock options cancelled506,718 
RSUs granted(668,605)
RSUs cancelled210,123 
Available at end of period16,612,806 
Summary of Stock Option Activity
The following table summarizes stock option activity (in thousands, except share and per share data):
 Stock options Outstanding
 Number of
Stock Options
Outstanding		Weighted-
Average
Exercise
Price		Remaining
Contractual
Term
(in years)		Aggregate
Intrinsic
Value
Balance as of April 30, 202015,260,506 $14.17 7.27$767,795 
Stock options granted40,129 $99.78 
Stock options exercised(4,035,115)$11.25 
Stock options cancelled(506,718)$19.19 
Stock options assumed in acquisition cancelled(899)$75.00 
Balance as of October 31, 202010,757,903 $15.33 6.93$925,989 
Exercisable as of October 31, 20205,926,542 $12.36 6.56$527,662 
Summary of RSU Activity
The following table summarizes RSU activity for the 2012 Plan:
 Number of
Awards		Weighted-
Average
Grant Date
Fair Value
Outstanding and unvested at April 30, 20202,472,092 $66.78 
RSUs granted668,605 $88.20 
RSUs released(312,898)$76.33 
RSUs cancelled(210,123)$52.15 
Outstanding and unvested at October 31, 20202,617,676 $72.28 
Summary of Stock-based Compensation Expense Recognized in Consolidated Statements of Operations
Total stock-based compensation expense recognized in the Company’s condensed consolidated statements of operations was as follows (in thousands):
 Three Months Ended October 31,Six Months Ended October 31,
 2020201920202019
Cost of revenue—cost of subscription—self-managed and SaaS$1,860 $946 $3,226 $1,861 
Cost of revenue—professional services976 638 1,928 1,199 
Research and development7,663 5,870 14,793 10,831 
Sales and marketing7,955 4,658 14,147 8,966 
General and administrative3,033 2,304 5,984 4,330 
Total stock-based compensation expense$21,487 $14,416 $40,078 $27,187