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Stock-Based Compensation - Summary of Stock Option Activity Under 2011 and 2017 Stock Plan (Details) - 2011, 2017, and 2019 Plans $ / shares in Units, $ in Thousands | 9 Months Ended | 12 Months Ended
--- | --- | ---
May 02, 2020 USD ($) $ / shares shares | Aug. 03, 2019 USD ($) $ / shares shares
Number of Options |  |
Outstanding, beginning balance (in shares) | shares | 7,070,125 |
Granted (in shares) | shares | 1,602,670 |
Exercised (in shares) | shares | (764,284) |
Cancelled (in shares) | shares | (500,803) |
Outstanding, ending balance (in shares) | shares | 7,407,708 | 7,070,125
Weighted- Average Exercise Price |  |
Outstanding, beginning balance (in dollars per share) | $ / shares | $ 14.48 |
Granted (in dollars per share) | $ / shares | 23.39 |
Exercised (in dollars per share) | $ / shares | 8.09 |
Cancelled (in dollars per share) | $ / shares | 22.33 |
Outstanding, ending balance (in dollars per share) | $ / shares | $ 16.79 | $ 14.48
Weighted- Average Remaining Contractual Life (in Years) |  |
Outstanding, weighted-average remaining contractual life | 7 years 7 months 2 days | 7 years 8 months 19 days
Aggregate Intrinsic Value (in thousands) |  |
Outstanding, aggregate intrinsic value | $ | $ 21,095 | $ 73,861

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- Definition The number of shares under options that were cancelled during the reporting period as a result of occurrence of a terminating event specified in contractual agreements pertaining to the stock option plan. + 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)(iv)(3) -URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901 + Details
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- Definition Amount by which the current fair value of the underlying stock exceeds the exercise price of options outstanding. + 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 -URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901 + Details
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