Long-Term Debt (Tables)

6 Months Ended

Mar. 31, 2021

Debt Disclosure [Abstract]

Schedule of Long-Term Debt

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

	March 31, 2021			September 30, 2020
3.00% Convertible Senior Notes due 2025, net of unamortized discount of $16,815 and deferred issuance costs of $4,228 at March 31, 2021. Effective interest rate 6.29%.	$	153,957		$	151,791
Senior Credit Facilities, net of unamortized discount of $2,087 and deferred issuance costs of $252 at March 31, 2021. Effective interest rate 3.39%.		117,974			121,331
Total debt	$	271,931		$	273,122
Less: current portion		(6,250	)		(6,250	)
Total long-term debt	$	265,681		$	266,872

Summary of Maturities of Borrowing Obligations

The following table summarizes the maturities of our borrowing obligations as of March 31, 2021 (in thousands):

Fiscal Year	Convertible Senior Notes			Senior Facilities			Total
2021	$	—		$	3,125		$	3,125
2022		—			6,250			6,250
2023		—			10,938			10,938
2024		—			12,500			12,500
2025		175,000			87,500			262,500
Thereafter		—			—			—
Total before unamortized discount and issuance costs and current portion	$	175,000		$	120,313		$	295,313
Less: unamortized discount and issuance costs		(21,043	)		(2,339	)		(23,382	)
Less: current portion of long-term debt		—			(6,250	)		(6,250	)
Total long-term debt	$	153,957		$	111,724		$	265,681

Schedule of Interest Expense Related to Notes

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

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