Long-Term Debt (Tables)

12 Months Ended

Sep. 30, 2023

Debt Disclosure [Abstract]

Schedule of Long-Term Debt

Long-term debt consisted of the following (in thousands):

September 30, 2023
Description	Maturity Date	Convertible Debt Coupon Rate	Effective Interest Rate	Principal		Unamortized Discount			Deferred Issuance Costs			Carrying Value
2025 Modified Notes	6/1/2025	3.00%	3.70%	$	87,500	$	-		$	(992	)	$	86,508
2025 Modified Notes	7/1/2028	1.50%	8.75%		87,500		(3,796	)		(14,490	)		69,214
2028 Notes	7/1/2028	1.50%	1.91%		122,500		-			(2,271	)		120,229
Total debt				$	297,500	$	(3,796	)	$	(17,753	)		275,951
Less: current portion of long-term debt													—
Total long-term debt												$	275,951

September 30, 2022
Description	Maturity Date	Convertible Debt Coupon Rate	Effective Interest Rate	Principal		Unamortized Discount			Deferred Issuance Costs			Carrying Value
2025 Notes	6/1/2025	3.00%	6.29%	$	175,000	$	(11,264	)	$	(2,832	)	$	160,904
Senior Credit Facility	4/1/2025	N/A	5.37%		110,938		(1,310	)		(158	)		109,470
Total debt				$	285,938	$	(12,574	)	$	(2,990	)		270,374
Less: current portion of long-term debt													(10,938	)
Total long-term debt												$	259,436

Summary of Maturities of Borrowing Obligations

The following table summarizes the maturities of our borrowing obligations as of September 30, 2023 (in thousands):

Fiscal Year	2028 Notes			2025 Modified Notes			Total
2024	$	—		$	—		$	—
2025		—			87,500			87,500
2026		—			—			—
2027		—			—			—
2028		122,500			87,500			210,000
Total before unamortized discount and issuance costs and current portion	$	122,500		$	175,000		$	297,500
Less: unamortized discount and issuance costs		(2,271	)		(19,278	)		(21,549	)
Total long-term debt	$	120,229		$	155,722		$	275,951

Schedule of Interest Expense Related to Notes

The interest expense recognized related to the Notes for the fiscal years ended September 30, 2023, 2022 and 2021 was as follows (dollars in thousands):

	Year Ended September 30,
	2023		2022		2021
Contractual interest expense	$	5,383	$	5,246	$	5,246
Amortization of debt discount		258		3,755		3,527
Amortization of issuance costs		2,119		944		887
Total interest expense related to the Notes	$	7,760	$	9,945	$	9,660