Debt (Tables)

12 Months Ended

Sep. 30, 2021

Debt Disclosure [Abstract]

Long-term Debt Instruments

The following tables present our debt instruments outstanding, contractual maturities and interest expense:

	September 30, 2021						September 30, 2020
(in thousands)	Gross Amount		Debt Discount and Issuance Costs		Carrying Amount		Gross Amount		Debt Discount and Issuance Costs		Carrying Amount
2024 Convertible Notes	$	143,750	$	(20,207)	$	123,543	$	143,750	$	(26,557)	$	117,193
2025 Convertible Notes	172,500		(31,857)		140,643		172,500		(39,336)		133,164
8.5% unsecured debt due 2024*	—		—		—		872		—		872
Total	$	316,250	$	(52,064)	$	264,186	$	317,122	$	(65,893)	$	251,229
Less current portion	—		—		—		213		—		213
Total long-term debt	$	316,250	$	(52,064)	$	264,186	$	316,909	$	(65,893)	$	251,016

*    Amounts translated from Guatemalan quetzales as of the applicable period end.

Schedule of Maturities of Debt

	Schedule of Contractual Maturities
(in thousands)	Total		Less Than 1 Year		1 - 3 Years		3 - 5 Years
2024 Convertible Notes*	$	143,750	$	—	$	143,750	$	—
2025 Convertible Notes*	172,500		—		—		172,500
Total	$	316,250	$	—	$	143,750	$	172,500

*    Excludes the potential impact of embedded derivatives.

Schedule of Interest Expense

	Fiscal Year Ended September 30,
(in thousands)	2021		2020		2019
2019 Convertible Notes:
Contractual interest expense	$	—	$	—	$	3,074
Amortization of debt discount and deferred financing costs	—		—		7,556
Total interest expense	$	—	$	—	$	10,630
2024 Convertible Notes:
Contractual interest expense	$	4,133	$	4,133	$	4,133
Amortization of debt discount and deferred financing costs	6,349		5,883		5,452
Total interest expense	$	10,482	$	10,016	$	9,585
2025 Convertible Notes:
Contractual interest expense	$	4,097	$	4,097	$	4,097
Amortization of debt discount and deferred financing costs	7,479		6,954		6,468
Total interest expense	$	11,576	$	11,051	$	10,565