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Stock-Based Compensation - Summary of Stock Option Activity (Details) - 2011, 2017, and 2019 Plans $ / shares in Units, $ in Thousands | 9 Months Ended | 12 Months Ended
--- | --- | ---
Apr. 30, 2022 USD ($) $ / shares shares | Jul. 31, 2021 USD ($) $ / shares shares
Number of Options |  |
Outstanding, beginning balance (in shares) | shares | 3,650,482 |
Granted (in shares) | shares | 1,201,877 |
Exercised (in shares) | shares | (171,996) |
Cancelled (in shares) | shares | (279,869) |
Outstanding, ending balance (in shares) | shares | 4,400,494 | 3,650,482
Weighted- Average Exercise Price |  |
Outstanding, beginning balance (in dollars per share) | $ / shares | $ 25.47 |
Granted (in dollars per share) | $ / shares | 14.54 |
Exercised (in dollars per share) | $ / shares | 8.95 |
Cancelled (in dollars per share) | $ / shares | 32.62 |
Outstanding, ending balance (in dollars per share) | $ / shares | $ 22.67 | $ 25.47
Weighted- Average Remaining Contractual Life (in Years) |  |
Outstanding, weighted-average remaining contractual life | 7 years 6 months 7 days | 7 years 4 months 24 days
Aggregate Intrinsic Value (in thousands) |  |
Outstanding, aggregate intrinsic value | $ | $ 1,501 | $ 106,490

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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=120381028&loc=d3e5070-113901 + Details
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- Definition Weighted average remaining contractual term for option awards outstanding, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + 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 (e)(1) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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