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Convertible Senior Notes (Tables) | 3 Months Ended
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Oct. 31, 2021
Debt Disclosure [Abstract] |
Schedule of convertible debt | The net carrying value of the liability component, unamortized debt discount and unamortized debt issuance costs of the Convertible Senior Notes was as follows (in thousands):
| October 31, 2021 |  | July 31, 2021
Principal | $ | 400,000 |  |  | $ | 400,000 |
Less unamortized: |  |  |
Debt discount | 47,022 |  |  | 50,198 |
Debt issuance costs | 5,629 |  |  | 5,977 |
Net carrying amount | $ | 347,349 |  |  | $ | 343,825 |
The effective interest rate of the Convertible Senior Notes is 5.53%. The following table sets forth the interest expense recognized related to the Convertible Senior Notes (in thousands):
| Three Months Ended October 31, |  |
| 2021 |  | 2020 |  |  |  |
Contractual interest expense | $ | 1,250 |  |  | $ | 1,250 |  |  |  |  |
Amortization of debt discount | 3,176 |  |  | 3,020 |  |  |  |  |
Amortization of debt issuance costs | 348 |  |  | 315 |  |  |  |  |
Total | $ | 4,774 |  |  | $ | 4,585 |  |  |  |  |

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