Debt (Tables)

9 Months Ended

Jun. 30, 2023

Debt Disclosure [Abstract]

Schedule of Long Term Debt Instruments

The following table presents the Company's debt instruments outstanding:

	June 30, 2023						June 30, 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	$	(6,970)	$	223,030	$	—	$	—	$	—	$	—	$	—	$	—
2025 Convertible Notes	103,373		(940)		102,433		172,500		(2,383)		170,117		172,500		(2,172)		170,328
2024 Convertible Notes	34,389		(166)		34,223		143,750		(1,346)		142,404		143,750		(1,175)		142,575
Total long-term debt	$	367,762	$	(8,076)	$	359,686	$	316,250	$	(3,729)	$	312,521	$	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 June 30, 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 nine months ended June 30, 2023 and 2022:

	Three Months Ended June 30,				Nine Months Ended June 30,
(in thousands)	2023		2022		2023		2022
2029 Convertible Notes:
Contractual interest expense	$	2,157	$	—	$	4,744	$	—
Amortization of deferred financing costs	239		—		488		—
Total interest expense	$	2,396	$	—	$	5,232	$	—
2025 Convertible Notes:
Contractual interest expense	$	614	$	1,025	$	2,170	$	3,073
Amortization of deferred financing costs	121		197		429		586
Gain on extinguishment	—		—		(5,389)		—
Total interest expense	$	735	$	1,222	$	(2,790)	$	3,659
2024 Convertible Notes:
Contractual interest expense	$	247	$	1,033	$	1,370	$	3,099
Amortization of deferred financing costs	39		156		218		465
Loss on extinguishment	—		—		8,935		—
Total interest expense	$	286	$	1,189	$	10,523	$	3,564