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Debt (Tables)
12 Months Ended
Sep. 30, 2024
Debt Disclosure [Abstract]  
Schedule of Long-term Debt Instruments
The following table presents the Company’s debt instruments outstanding:
 September 30, 2024September 30, 2023
(in thousands)Gross AmountDebt Issuance CostsCarrying
Amount
Gross AmountDebt Issuance CostsCarrying
Amount
2029 Convertible Notes$230,000 $(5,744)$224,256 $230,000 $(6,716)$223,284 
2025 Convertible Notes103,373 (301)103,072 103,373 (810)102,563 
2024 Convertible Notes— — — 34,389 (124)34,265 
Total$333,373 $(6,045)$327,328 $367,762 $(7,650)$360,112 
Less current portion103,373 (301)103,072 34,389 (124)34,265 
Total long-term debt$230,000 $(5,744)$224,256 $333,373 $(7,526)$325,847 
Schedule of Maturities of Debt
The following table presents the Company’s contractual maturities related to the debt instruments as of September 30, 2024
Schedule of Contractual Maturities
(in thousands)2029 Convertible Notes2025 Convertible NotesTotal
Fiscal 2025
$— $103,373 $103,373 
Fiscal 2026
— — — 
Fiscal 2027
— — — 
Fiscal 2028
— — — 
Fiscal 2029
— — — 
Thereafter230,000 — 230,000 
Total long-term debt$230,000 $103,373 $333,373 
Schedule of Interest Expense
The following table presents the Company’s interest expense related to the Convertible Notes:
Fiscal Year Ended September 30,
(in thousands)202420232022
2029 Convertible Notes:
Contractual interest expense$8,625 $6,900 $— 
Amortization of deferred financing costs972 742 — 
Total interest expense$9,597 $7,642 $— 
2025 Convertible Notes:
Contractual interest expense$2,455 $2,779 $4,097 
Amortization of deferred financing costs509 559 797 
Gain on extinguishment— (5,389)— 
Total interest expense$2,964 $(2,051)$4,894 
2024 Convertible Notes:
Contractual interest expense$742 $1,609 $4,133 
Amortization of deferred financing costs124 260 635 
Loss on extinguishment— 8,935 — 
Total interest expense$866 $10,804 $4,768