Stock-Based Compensation (Tables)

12 Months Ended

Jul. 31, 2021

Share-based Payment Arrangement [Abstract]

Schedule of Shares Available For Grant

The following table summarizes the shares available for grant under the 2017 Plan:

	Shares Available for Grant
Balance – August 1, 2020	916,172
Authorized	5,187,757
Granted	(6,605,011)
Forfeited	4,668,798
Balance – July 31, 2021	4,167,716

Schedule of Stock Option Activity

Stock option activity under the 2011 Plan, 2017 Plan, and 2019 Plan is as follows:

	Options Outstanding
	Number of Options	Weighted- Average Exercise Price		Weighted- Average Remaining Contractual Life (in Years)	Aggregate Intrinsic Value (in thousands)
Balance – August 1, 2020	6,817,196	$	17.10	7.41	$	40,252
Granted	633,659	57.26
Exercised	(2,067,751)	12.53
Forfeited	(1,732,622)	19.63
Balance – July 31, 2021	3,650,482	$	25.47	7.40	$	106,490
Options vested and exercisable - July 31, 2021	1,817,354	$	18.83	6.61	$	63,912
Options vested and expected to vest - July 31, 2021	3,558,106	$	25.44	7.38	$	103,883

Summary of Restricted Stock Unit Award Activity

The following table summarizes the restricted stock unit (“RSU”) award activity under the 2017 Plan and 2019 Plan:

	Unvested RSUs
	Class A Common Stock	Weighted- Average Grant Date Fair Value
Unvested at August 1, 2020	9,123,341	$	20.11
Granted	6,463,980	40.33
Vested	(2,132,298)	21.62
Forfeited	(3,190,098)	23.83
Unvested at July 31, 2021	10,264,925	$	31.35

Summary of Black - Scholes Option - Pricing Model Assumptions Used in Estimating Fair Value of Stock Options

The fair value of stock options granted to employees was estimated at the grant date using the Black-Scholes option-pricing model with the following assumptions:

	For the Fiscal Year Ended
	July 31, 2021		August 1, 2020		August 3, 2019
Expected term (in years)	5.3 - 6.3		5.5 - 6.2		5.1 - 6.5
Volatility	55.5 - 55.9%		50.1 - 51.2%		41.7 - 52.2%
Risk free interest rate	0.3 - 1.1%		1.4 - 1.7%		2.3 - 3.0%
Dividend yield	—	%	—	%	—	%