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CONVERTIBLE SENIOR NOTES AND CAPPED CALLS (Tables) | 6 Months Ended
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Sep. 30, 2021
Debt Disclosure [Abstract] |
Schedule of Convertible Debt | The following table presents the net carrying amount of the liability component of the Notes:
|  | September 30, 2021 |  | March 31, 2021
Principal |  | $ | 362,500 |  |  | $ | 362,500 |
Unamortized debt discount |  | (44,589) |  |  | (53,323) |
Unamortized issuance costs |  | (620) |  |  | (742) |
Net carrying amount |  | $ | 317,291 |  |  | $ | 308,435 |
Schedule of Interest Income and Interest Expense Disclosure | The following table presents interest expense related to the Notes:
|  | Three Months Ended September 30, |  | Six Months Ended September 30,
|  | 2021 |  | 2020 |  | 2021 |  | 2020
Contractual interest expense |  | $ | 453 |  |  | $ | 453 |  |  | $ | 906 |  |  | $ | 906 |
Amortization of debt discount |  | 4,401 |  |  | 4,133 |  |  | 8,733 |  |  | 8,201 |
Amortization of issuance costs |  | 62 |  |  | 58 |  |  | 122 |  |  | 115 |
Total interest expense |  | $ | 4,916 |  |  | $ | 4,644 |  |  | $ | 9,761 |  |  | $ | 9,222 |

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