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Stock-Based Compensation (Tables) | 9 Months Ended
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May 02, 2020
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 3, 2019 |  |  |  | 7,070,125 |  |  | $ | 14.48 |  |  | 7.72 |  | $ | 73,861 |
Granted |  |  |  | 1,602,670 |  |  | $ | 23.39 |  |  |  |  |
Exercised |  |  |  | (764,284) |  |  | $ | 8.09 |  |  |  |  |
Cancelled |  |  |  | (500,803) |  |  | $ | 22.33 |  |  |  |  |
Balance – May 2, 2020 |  |  |  | 7,407,708 |  |  | $ | 16.79 |  |  | 7.59 |  | $ | 21,095 |
Summary of Restricted Stock Units 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 3, 2019 | 4,428,845 |  |  | $ | 27.30 |  |  |  |  |
Granted | 7,032,993 |  |  | $ | 17.01 |  |  |  |  |
Vested | (714,908) |  |  | $ | 25.14 |  |  |  |  |
Forfeited | (1,069,114) |  |  | $ | 24.49 |  |  |  |  |
Unvested at May 2, 2020 | 9,677,816 |  |  | $ | 20.30 |  |  |  |  |
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 Nine Months Ended |  |
| May 2, 2020 |  | April 27, 2019 |  | May 2, 2020 |  | April 27, 2019
Expected term (in years) | 6.2 - 6.2 |  | 6.0 - 6.5 |  | 5.5 - 6.2 |  | 5.1 - 6.5
Volatility | 50.1 | % |  | 52.2% |  | 50.1% - 51.2% |  | 41.7% - 52.2%
Risk free interest rate | 1.4 | % |  | 2.6% |  | 1.4% - 1.7% |  | 2.6% - 3.0%
Dividend yield | — | % |  | — | % |  | — | % |  | — | %

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- Definition Tabular disclosure of the number and weighted-average grant date fair value for restricted stock units that were outstanding at the beginning and end of the year, and the number of restricted stock units that were granted, vested, or forfeited during the year. + 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 (c)(1) -URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901 + Details
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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=116856206&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=116856206&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=116856206&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=116856206&loc=d3e5070-113901 + Details
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