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Stock-Based Compensation (Tables) | 6 Months Ended
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Jan. 30, 2021
Share-based Payment Arrangement [Abstract] |
Summary of Stock Option Activity Under 2011 and 2017 Stock Plan | 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 |  |  |  | 392,000 |  |  | $ | 56.50 |  |  |  |  |
Exercised |  |  |  | (1,601,726) |  |  | $ | 12.82 |  |  |  |  |
Cancelled |  |  |  | (1,054,611) |  |  | $ | 22.19 |  |  |  |  |
Balance – January 30, 2021 |  |  |  | 4,552,859 |  |  | $ | 20.82 |  |  | 7.33 |  | $ | 339,750 |
Schedule of Unvested Restricted Stock Units 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 | 4,727,643 |  |  | $ | 31.87 |  |  |  |  |
Vested | (950,507) |  |  | $ | 22.05 |  |  |  |  |
Forfeited | (1,468,261) |  |  | $ | 21.62 |  |  |  |  |
Unvested at January 30, 2021 | 11,432,216 |  |  | $ | 24.62 |  |  |  |  |
Summary of Assumptions Used in Black-Scholes Option-Pricing Model to Determine 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 Three Months Ended |  | For the Six Months Ended
| January 30, 2021 |  | February 1, 2020 |  | January 30, 2021 |  | February 1, 2020
Expected term (in years) | 5.3 - 6.3 |  | 5.5 - 6.1 |  | 5.3 - 6.3 |  | 5.5 - 6.2
Volatility | 55.5 | % |  | 50.1% |  | 55.5% - 55.9% |  | 50.1% - 51.2%
Risk free interest rate | 0.4% - 0.5% |  | 1.6% |  | 0.3% - 0.5% |  | 1.6% - 1.7%
Dividend yield | — | % |  | — | % |  | — | % |  | — | %

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- Definition Tabular disclosure for stock option plans. Includes, but is not limited to, outstanding awards at beginning and end of year, grants, exercises, forfeitures, and weighted-average grant date fair value. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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- Definition Tabular disclosure of the significant assumptions used during the year to estimate the fair value of stock options, including, but not limited to: (a) expected term of share options and similar instruments, (b) expected volatility of the entity's shares, (c) expected dividends, (d) risk-free rate(s), and (e) discount for post-vesting restrictions. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (f)(2) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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- Definition Tabular disclosure of the change in restricted stock units (RSUs). + References No definition available. + Details
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