Long-Term Debt (Tables)

6 Months Ended

Mar. 31, 2022

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

	March 31, 2022			September 30, 2021
3.00% Convertible Senior Notes due 2025, net of unamortized discount of $13,176 and $15,019, respectively, and deferred issuance costs of $3,313 and $3,776, respectively. Effective interest rate 6.29%.	$	158,511		$	156,205
Senior Credit Facilities, net of unamortized discount of $1,571 and $1,829, respectively, and deferred issuance costs of $190 and $221, respectively. Effective interest rate 3.25% and 2.86%, respectively.		112,302			115,138
Total debt	$	270,813		$	271,343
Less: current portion		(7,813	)		(6,250	)
Total long-term debt	$	263,000		$	265,093

Summary of Maturities of Borrowing Obligations

The following table summarizes the maturities of our borrowing obligations as of March 31, 2022 (in thousands):

Fiscal Year	Convertible Senior Notes			Senior Facilities			Total
2022	$	—		$	3,125		$	3,125
2023		—			10,938			10,938
2024		—			12,500			12,500
2025		175,000			87,500			262,500
Total before unamortized discount and issuance costs and current portion	$	175,000		$	114,063		$	289,063
Less: unamortized discount and issuance costs		(16,489	)		(1,761	)		(18,250	)
Less: current portion of long-term debt		—			(7,813	)		(7,813	)
Total long-term debt	$	158,511		$	104,489		$	263,000

Schedule of Interest Expense Related to Notes

The interest expense recognized related to the Notes for the three and six months ended March 31, 2022 and 2021 was as follows (dollars in thousands):

	Three Months Ended March 31,				Six Months Ended March 31,
	2022		2021		2022		2021
Contractual interest expense	$	1,294	$	1,294	$	2,616	$	2,616
Amortization of debt discount		919		863		1,843		1,731
Amortization of issuance costs		231		217		463		435
Total interest expense related to the Notes	$	2,444	$	2,374	$	4,922	$	4,782