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v3.23.1

Debt (Tables) | 6 Months Ended
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Mar. 31, 2023
Debt Disclosure [Abstract] |
Schedule of Long Term Debt Instruments | The following table presents the Company's debt instruments outstanding:
| March 31, 2023 |  | March 31, 2022 |  | September 30, 2022
(in thousands) | Gross Amount |  | Debt Issuance Costs |  | Carrying Amount |  | Gross Amount |  | Debt Issuance Costs |  | Carrying Amount |  | Gross Amount |  | Debt Issuance Costs |  | Carrying Amount
2029 Convertible Notes | $ | 230,000 |  |  | $ | (7,209) |  |  | $ | 222,791 |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |
2025 Convertible Notes | 103,373 |  |  | (1,061) |  |  | 102,312 |  |  | 172,500 |  |  | (2,580) |  |  | 169,920 |  |  | 172,500 |  |  | (2,172) |  |  | 170,328 |
2024 Convertible Notes | 34,389 |  |  | (205) |  |  | 34,184 |  |  | 143,750 |  |  | (1,502) |  |  | 142,248 |  |  | 143,750 |  |  | (1,175) |  |  | 142,575 |
Total long-term debt | $ | 367,762 |  |  | $ | (8,475) |  |  | $ | 359,287 |  |  | $ | 316,250 |  |  | $ | (4,082) |  |  | $ | 312,168 |  |  | $ | 316,250 |  |  | $ | (3,347) |  |  | $ | 312,903 |
Schedule of Maturities of Long-Term Debt | The following table presents the Company's contractual maturities related to the debt instruments as of March 31, 2023:
| Schedule of Contractual Maturities
(in thousands) | 2029 Convertible Notes |  | 2025 Convertible Notes |  | 2024 Convertible Notes |  | Total
Remaining 2023 | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |
Fiscal 2024 | — |  |  | — |  |  | 34,389 |  |  | 34,389 |
Fiscal 2025 | — |  |  | 103,373 |  |  | — |  |  | 103,373 |
Fiscal 2026 | — |  |  | — |  |  | — |  |  | — |
Fiscal 2027 | — |  |  | — |  |  | — |  |  | — |
Thereafter | 230,000 |  |  | — |  |  | — |  |  | 230,000 |
Total long-term debt | $ | 230,000 |  |  | $ | 103,373 |  |  | $ | 34,389 |  |  | $ | 367,762 |
Schedule of Interest Income and Interest Expense Disclosure | The following table presents the Company's interest expense related to the Convertible Notes for the three and six months ended March 31, 2023 and 2022:
| Three Months Ended March 31, |  | Six Months Ended March 31,
(in thousands) | 2023 |  | 2022 |  | 2023 |  | 2022
2029 Convertible Notes: |  |  |  |  |  |  |
Contractual interest expense | $ | 2,156 |  |  | $ | — |  |  | $ | 2,587 |  |  | $ | — |
Amortization of deferred financing costs | 197 |  |  | — |  |  | 249 |  |  | — |
Total interest expense | $ | 2,353 |  |  | $ | — |  |  | $ | 2,836 |  |  | $ | — |
2025 Convertible Notes: |  |  |  |  |  |  |
Contractual interest expense | $ | 614 |  |  | $ | 1,024 |  |  | $ | 1,556 |  |  | $ | 2,048 |
Amortization of deferred financing costs | 120 |  |  | 182 |  |  | 308 |  |  | 389 |
Gain on extinguishment | — |  |  | — |  |  | (5,389) |  |  | — |
Total interest expense | $ | 734 |  |  | $ | 1,206 |  |  | $ | (3,525) |  |  | $ | 2,437 |
2024 Convertible Notes: |  |  |  |  |  |  |
Contractual interest expense | $ | 247 |  |  | $ | 1,033 |  |  | $ | 1,123 |  |  | $ | 2,066 |
Amortization of deferred financing costs | 41 |  |  | 142 |  |  | 179 |  |  | 309 |
Loss on extinguishment | — |  |  | — |  |  | 8,935 |  |  | — |
Total interest expense | $ | 288 |  |  | $ | 1,175 |  |  | $ | 10,237 |  |  | $ | 2,375 |

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