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Net Income (Loss) Per Share (Details 2) - $ / shares | 3 Months Ended
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Oct. 31, 2021 | Oct. 31, 2020
Senior Notes | Convertible Debt | On or after October 15, 2024 |  |
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items] |  |
Conversion price (in dollars per share) | $ 113.75 |
Stock options |  |
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items] |  |
Antidilutive securities excluded from EPS (in shares) | 24,700 | 61,472
Stock awards |  |
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items] |  |
Antidilutive securities excluded from EPS (in shares) | 2,905,346 | 2,263,076
Convertible senior notes |  |
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items] |  |
Antidilutive securities excluded from EPS (in shares) | 133,668 | 0

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