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Debt (Tables) | 3 Months Ended
--- | ---
Dec. 31, 2025
Debt Disclosure [Abstract] |
Schedule of Long Term Debt Instruments | The following table presents the Company's debt instruments outstanding:
|  | December 31, 2025 |  | December 31, 2024 |  | September 30, 2025
(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 |  |  | $ | (6,968) |  |  | $ | 293,032 |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | 300,000 |  |  | $ | (7,182) |  |  | $ | 292,818 |
2029 Convertible Notes |  | 230,000 |  |  | (4,477) |  |  | 225,523 |  |  | 230,000 |  |  | (5,495) |  |  | 224,505 |  |  | 230,000 |  |  | (4,742) |  |  | 225,258 |
2025 Convertible Notes |  | — |  |  | — |  |  | — |  |  | 103,373 |  |  | (168) |  |  | 103,205 |  |  | — |  |  | — |  |  | — |
Total |  | $ | 530,000 |  |  | $ | (11,445) |  |  | $ | 518,555 |  |  | $ | 333,373 |  |  | $ | (5,663) |  |  | $ | 327,710 |  |  | $ | 530,000 |  |  | $ | (11,924) |  |  | $ | 518,076 |
Less current portion |  | — |  |  | — |  |  | — |  |  | 103,373 |  |  | (168) |  |  | 103,205 |  |  | — |  |  | — |  |  | — |
Total long-term debt |  | $ | 530,000 |  |  | $ | (11,445) |  |  | $ | 518,555 |  |  | $ | 230,000 |  |  | $ | (5,495) |  |  | $ | 224,505 |  |  | $ | 530,000 |  |  | $ | (11,924) |  |  | $ | 518,076 |
Schedule of Interest Expense | The following table presents the Company’s interest expense related to its debt for the three months ended December 31, 2025 and 2024:
|  |  |  | Three Months Ended December 31,
(in thousands) |  |  |  |  |  | 2025 |  | 2024
2032 Senior Notes: |  |  |  |  |  |  |  |
Contractual interest expense |  |  |  |  |  | $ | 5,531 |  |  | $ | — |
Amortization of deferred financing costs |  |  |  |  |  | 214 |  |  | — |
Total interest expense |  |  |  |  |  | $ | 5,745 |  |  | $ | — |
2029 Convertible Notes: |  |  |  |  |  |  |  |
Contractual interest expense |  |  |  |  |  | $ | 2,156 |  |  | $ | 2,156 |
Amortization of deferred financing costs |  |  |  |  |  | 265 |  |  | 249 |
Total interest expense |  |  |  |  |  | $ | 2,421 |  |  | $ | 2,405 |
2025 Convertible Notes: |  |  |  |  |  |  |  |
Contractual interest expense |  |  |  |  |  | $ | — |  |  | $ | 614 |
Amortization of deferred financing costs |  |  |  |  |  | — |  |  | 133 |
Total interest expense |  |  |  |  |  | $ | — |  |  | $ | 747 |

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