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v3.25.1

Debt (Tables) | 6 Months Ended
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Mar. 31, 2025
Debt Disclosure [Abstract] |
Schedule of Long Term Debt Instruments | The following table presents the Company's debt instruments outstanding:
| March 31, 2025 |  | March 31, 2024 |  | September 30, 2024
(in thousands) | Gross Amount |  | Deferred Financing Costs |  | Carrying Amount |  | Gross Amount |  | Deferred Financing Costs |  | Carrying Amount |  | Gross Amount |  | Deferred Financing Costs |  | Carrying Amount
2032 Senior Notes | $ | 300,000 |  |  | $ | (7,535) |  |  | $ | 292,465 |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |
2029 Convertible Notes | 230,000 |  |  | (5,277) |  |  | 224,723 |  |  | 230,000 |  |  | (6,244) |  |  | 223,756 |  |  | 230,000 |  |  | (5,744) |  |  | 224,256 |
2025 Convertible Notes | 103,373 |  |  | (48) |  |  | 103,325 |  |  | 103,373 |  |  | (556) |  |  | 102,817 |  |  | 103,373 |  |  | (301) |  |  | 103,072 |
2024 Convertible Notes | — |  |  | — |  |  | — |  |  | 34,389 |  |  | (42) |  |  | 34,347 |  |  | — |  |  | — |  |  | — |
Total | $ | 633,373 |  |  | $ | (12,860) |  |  | $ | 620,513 |  |  | $ | 367,762 |  |  | $ | (6,842) |  |  | $ | 360,920 |  |  | $ | 333,373 |  |  | $ | (6,045) |  |  | $ | 327,328 |
Less current portion | 103,373 |  |  | (48) |  |  | 103,325 |  |  | 34,389 |  |  | (42) |  |  | 34,347 |  |  | 103,373 |  |  | (301) |  |  | 103,072 |
Total long-term debt | $ | 530,000 |  |  | $ | (12,812) |  |  | $ | 517,188 |  |  | $ | 333,373 |  |  | $ | (6,800) |  |  | $ | 326,573 |  |  | $ | 230,000 |  |  | $ | (5,744) |  |  | $ | 224,256 |
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, 2025:
| Schedule of Contractual Maturities
(in thousands) | 2032 Senior Notes |  | 2029 Convertible Notes |  | 2025 Convertible Notes |  |  |  | Total
Remaining 2025 | $ | — |  |  | $ | — |  |  | $ | 103,373 |  |  |  |  | $ | 103,373 |
Fiscal 2026 | — |  |  | — |  |  | — |  |  |  |  | — |
Fiscal 2027 | — |  |  | — |  |  | — |  |  |  |  | — |
Fiscal 2028 | — |  |  | — |  |  | — |  |  |  |  | — |
Fiscal 2029 | — |  |  | — |  |  | — |  |  |  |  | — |
Thereafter | 300,000 |  |  | 230,000 |  |  | — |  |  |  |  | 530,000 |
Total long-term debt | $ | 300,000 |  |  | $ | 230,000 |  |  | $ | 103,373 |  |  |  |  | $ | 633,373 |
Schedule of Interest Expense | The following table presents the Company’s interest expense related to it’s debt for the three and six months ended March 31, 2025 and 2024:
|  |  | Three Months Ended March 31, |  | Six Months Ended March 31,
(in thousands) |  |  |  |  | 2025 |  | 2024 |  | 2025 |  | 2024
2032 Senior Notes: |  |  |  |  |  |  |  |  |  |  |
Contractual interest expense |  |  |  |  | $ | 184 |  |  | $ | — |  |  | $ | 184 |  |  | $ | — |
Amortization of deferred financing costs |  |  |  |  | 7 |  |  | — |  |  | 7 |  |  | — |
Total interest expense |  |  |  |  | $ | 191 |  |  | $ | — |  |  | $ | 191 |  |  | $ | — |
2029 Convertible Notes: |  |  |  |  |  |  |  |  |  |  |
Contractual interest expense |  |  |  |  | $ | 2,157 |  |  | $ | 2,157 |  |  | $ | 4,313 |  |  | $ | 4,313 |
Amortization of deferred financing costs |  |  |  |  | 217 |  |  | 228 |  |  | 466 |  |  | 472 |
Total interest expense |  |  |  |  | $ | 2,374 |  |  | $ | 2,385 |  |  | $ | 4,779 |  |  | $ | 4,785 |
2025 Convertible Notes: |  |  |  |  |  |  |  |  |  |  |
Contractual interest expense |  |  |  |  | $ | 614 |  |  | $ | 614 |  |  | $ | 1,228 |  |  | $ | 1,228 |
Amortization of deferred financing costs |  |  |  |  | 119 |  |  | 123 |  |  | 252 |  |  | 254 |
Total interest expense |  |  |  |  | $ | 733 |  |  | $ | 737 |  |  | $ | 1,480 |  |  | $ | 1,482 |
2024 Convertible Notes: |  |  |  |  |  |  |  |  |  |  |
Contractual interest expense |  |  |  |  | $ | — |  |  | $ | 247 |  |  | $ | — |  |  | $ | 494 |
Amortization of deferred financing costs |  |  |  |  | — |  |  | 39 |  |  | — |  |  | 81 |
Total interest expense |  |  |  |  | $ | — |  |  | $ | 286 |  |  | $ | — |  |  | $ | 575 |

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