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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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Tabular disclosure of interest income and expense, including, but not limited to, interest income and expense from investments, loans, and securities.

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Tabular disclosure of long-debt instruments or arrangements, including identification, terms, features, collateral requirements and other information necessary to a fair presentation. These are debt arrangements that originally required repayment more than twelve months after issuance or greater than the normal operating cycle of the entity, if longer.

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