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Net Income (Loss) Per Share (Details 2) - $ / shares | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jan. 31, 2022 | Jan. 31, 2022 | Jan. 31, 2021 | Jan. 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 | $ 113.75 |  |
Stock options |  |  |  |
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items] |  |  |  |
Antidilutive securities excluded from EPS (in shares) | 20,216 | 22,458 | 35,724 | 48,598
Stock awards |  |  |  |
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items] |  |  |  |
Antidilutive securities excluded from EPS (in shares) | 3,268,003 | 3,126,378 | 3,020,497 | 2,899,553
Convertible senior notes |  |  |  |
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items] |  |  |  |
Antidilutive securities excluded from EPS (in shares) | 0 | 66,834 | 209,722 | 104,861

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