Long-term Debt (Tables)

3 Months Ended

Dec. 31, 2018

Debt Disclosure [Abstract]

Long term debt instruments

The following tables present our long-term debt instruments outstanding as well as future principal payments due:

	December 31, 2018							December 31, 2017							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	$	(4,924	)	$	190,076	$	195,000	$	(15,165	)	$	179,835	$	195,000	$	(7,567	)	$	187,433
2019 Convertible Notes Embedded Derivative	21		—			21		12,863		—			12,863		2,552		—			2,552
2024 Convertible Notes	143,750		(36,568		)	107,182		143,750		(41,687		)	102,063		143,750		(37,892		)	105,858
2025 Convertible Notes	172,500		(51,184		)	121,316		—		—			—		172,500		(52,764		)	119,736
8.5% unsecured notes due 2024*	1,237		—			1,237		—		—			—		1,304		—			1,304
CASHMAX secured borrowing facility**	1,160		(826		)	334		—		—			—		—		—			—
Total	$	513,668	$	(93,502	)	$	420,166	$	351,613	$	(56,852	)	$	294,761	$	515,106	$	(98,223	)	$	416,883
Less current portion	195,162		(4,924		)	190,238		—		—			—		197,748		(7,567		)	190,181
Total long-term debt	$	318,506	$	(88,578	)	$	229,928	$	351,613	$	(56,852	)	$	294,761	$	317,358	$	(90,656	)	$	226,702

* Amount translated from Guatemalan quetzals as of December 31, 2018. Certain disclosures omitted due to materiality considerations.

**

See description below.

Principal payment schedule

	Principal Payment Schedule
	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	1,237		141		424		424		248
CASHMAX secured borrowing facility	1,160		—		1,160		—		—
	$	513,647	$	195,141	$	1,584	$	424	$	316,498

*

Excludes the potential impact of embedded derivatives.

Schedule of interest expense

	Three Months Ended December 31,
	2018		2017
	(in millions)
2019 Convertible Notes:
Contractual interest expense	$	1.1	$	1.1
Amortization of debt discount and deferred financing costs	2.6		2.5
Total interest expense	$	3.7	$	3.6
2024 Convertible Notes:
Contractual interest expense	$	1.0	$	1.0
Amortization of debt discount and deferred financing costs	1.4		1.3
Total interest expense	$	2.4	$	2.3
2025 Convertible Notes:
Contractual interest expense	$	1.0	$	—
Amortization of debt discount and deferred financing costs	1.6		—
Total interest expense	$	2.6	$	—