Debt (Tables)

6 Months Ended

Mar. 31, 2019

Debt Disclosure [Abstract]

Long term debt instruments

The following tables present our debt instruments outstanding as well as future principal payments due, contractual maturities and interest expense:

	March 31, 2019							March 31, 2018							September 30, 2018
	Gross Amount		Debt Discount and Issuance Costs			Carrying Amount		Gross Amount		Debt Discount and Issuance Costs			Carrying Amount		Gross Amount		Debt Discount and Issuance Costs			Carrying Amount
	(in thousands)
2019 Convertible Notes	$	195,000	$	(2,312	)	$	192,688	$	195,000	$	(12,704	)	$	182,296	$	195,000	$	(7,567	)	$	187,433
2019 Convertible Notes Embedded Derivative	—		—			—		16,042		—			16,042		2,552		—			2,552
2024 Convertible Notes	143,750		(35,217		)	108,533		143,750		(40,463		)	103,287		143,750		(37,892		)	105,858
2025 Convertible Notes	172,500		(49,582		)	122,918		—		—			—		172,500		(52,764		)	119,736
8.5% unsecured notes due 2024*	1,191		—			1,191		—		—			—		1,304		—			1,304
CASHMAX secured borrowing facility*	1,105		(801		)	304		—		—			—		—		—			—
Total	$	513,546	$	(87,912	)	$	425,634	$	354,792	$	(53,167	)	$	301,625	$	515,106	$	(98,223	)	$	416,883
Less current portion	195,213		(2,312		)	192,901		143,750		(40,463		)	103,287		197,748		(7,567		)	190,181
Total long-term debt	$	318,333	$	(85,600	)	$	232,733	$	211,042	$	(12,704	)	$	198,338	$	317,358	$	(90,656	)	$	226,702

* Amount translated from Guatemalan quetzals and Canadian dollars as of applicable period end. Certain disclosures omitted due to materiality considerations.

Principal payment schedule

	Schedule of Contractual Maturities
	Total		Less Than 1 Year		1 - 3 Years		3 - 5 Years		More Than 5 Years
	(in thousands)
2019 Convertible Notes*	$	195,000	$	195,000	$	—	$	—	$	—
2024 Convertible Notes*	143,750		—		—		—		143,750
2025 Convertible Notes*	172,500		—		—		—		172,500
8.5% unsecured notes due 2024	1,191		213		424		424		130
CASHMAX secured borrowing facility	1,105		—		1,105		—		—
	$	513,546	$	195,213	$	1,529	$	424	$	316,380

*

Excludes the potential impact of embedded derivatives.

Schedule of Interest Expense

	Three Months Ended March 31,				Six Months Ended March 31,
	2019		2018		2019		2018
	(in thousands)
2019 Convertible Notes:
Contractual interest expense	$	1,069	$	1,069	$	2,138	$	2,138
Amortization of debt discount and deferred financing costs	2,610		2,455		5,253		4,943
Total interest expense	$	3,679	$	3,524	$	7,391	$	7,081
2024 Convertible Notes:
Contractual interest expense	$	1,033	$	1,033	$	2,066	$	2,066
Amortization of debt discount and deferred financing costs	1,350		1,250		2,675		2,481
Total interest expense	$	2,383	$	2,283	$	4,741	$	4,547
2025 Convertible Notes:
Contractual interest expense	$	1,024	$	—	$	2,048	$	—
Amortization of debt discount and deferred financing costs	1,602		—		3,176		—
Total interest expense	$	2,626	$	—	$	5,224	$	—