Equity Incentive Plans (Tables)

12 Months Ended

Apr. 30, 2023

Share-Based Payment Arrangement [Abstract]

Summary of Equity Awards Available for Grant

The equity awards available for grant were as follows: 

	Year Ended April 30,
	2023	2022
Available at beginning of fiscal year	17,647,684	15,737,819
Awards authorized	4,708,746	4,526,699
Options granted	(94,105)	(495,460)
Options canceled	143,656	386,656
RSUs granted	(6,105,614)	(3,224,256)
RSUs canceled	1,263,099	715,870
Shares withheld for taxes	667	356
Available at end of period	17,564,133	17,647,684

Summary of Stock Option Activity

The following table summarizes stock option activity:

	Stock Options Outstanding
	Number of Stock Options Outstanding	Weighted- Average Exercise Price		Remaining Contractual Term (in years)	Aggregate Intrinsic Value (in thousands)
Balance as of April 30, 2021	7,611,016	$	20.34	6.66	$	768,517
Stock options granted	495,460	$	94.46
Stock options assumed in acquisitions	63,846	$	10.20
Stock options exercised	(2,563,287)	$	14.18
Stock options canceled	(386,656)	$	32.04
Stock options assumed in acquisition canceled	(1,255)	$	40.35
Balance as of April 30, 2022	5,219,124	$	29.41	6.22	$	266,021
Stock options granted	94,105	$	82.24
Stock options exercised	(1,127,036)	$	15.55
Stock options canceled	(143,656)	$	78.69
Stock options assumed in acquisition canceled	(4,299)	$	47.63
Balance as of April 30, 2023	4,038,238	$	32.74	5.35	$	134,778
Exercisable as of April 30, 2023	3,425,478	$	24.70	4.93	$	128,503

Summary of RSU Activity

The following table summarizes RSU activity under the 2012 Plan:

	Number of Awards	Weighted-Average Grant Date Fair Value
Outstanding and unvested at April 30, 2021	3,301,283	$	98.74
RSUs granted	3,224,256	$	113.91
RSUs released	(1,092,121)	$	96.65
RSUs canceled	(715,870)	$	106.34
Outstanding and unvested at April 30, 2022	4,717,548	$	108.44
RSUs granted	6,105,614	$	60.08
RSUs released	(2,065,664)	$	94.01
RSUs canceled	(1,263,099)	$	99.51
Outstanding and unvested at April 30, 2023	7,494,399	$	74.52

Summary of Stock-based Compensation Expense Related to Tender Offer Included in Consolidated Statement of Operations

Total stock-based compensation expense recognized in the Company’s consolidated statements of operations was as follows (in thousands):

	Year Ended April 30,
	2023		2022		2021
Cost of revenue
Subscription	$	8,308	$	8,368	$	7,105
Services	9,435		6,463		4,824
Research and development	80,170		59,911		35,267
Sales and marketing	68,943		45,798		31,581
General and administrative	37,183		20,654		14,903
Stock-based compensation expense, net of amounts capitalized	204,039		141,194		93,680
Capitalized stock-based compensation expense	—		188		10
Total stock-based compensation expense	$	204,039	$	141,382	$	93,690

Assumptions Used to Estimated Fair Value of Stock Options Granted

The fair value of stock options granted and assumed was estimated on the date of grant using the Black-Scholes option pricing model with the following assumptions:

	Year Ended April 30,
	2023	2022	2021
Expected term (in years)	6.02	5.52 - 6.08	6.02 - 6.08
Expected stock price volatility	60.7% - 62.0%	59.6% - 60.2%	62.6% - 63.9%
Risk-free interest rate	3.1% - 3.4%	1.4% - 1.8%	0.4% - 1.1%
Dividend yield	—%	—%	—%