Notes Payable Notes Payable (Tables)

12 Months Ended

Dec. 31, 2017

Debt Disclosure [Abstract]

Schedule of outstanding balance on convertible notes

The outstanding balances of the Convertible Notes as of December 31, 2017 consisted of the following (in thousands):

	2024 Convertible Notes
Liability component:
Principal	$	305,000
Less: debt discount and issuance costs, net	(138,994		)
Net carrying amount	$	166,006
Equity component:	$	134,450

Schedule of interest expense recognized related to convertible notes

The following table sets forth total interest expense recognized related to the Convertible Notes during the twelve months ended December 31, 2017 (in thousands):

	Twelve Months Ended December 31, 2017
	2017
Contractual interest expense	$	3,482
Amortization of debt discount	4,641
Amortization of debt issuance	175
Total interest expense	$	8,298

Schedule of future minimum payments on long-term debt

Future minimum payments on our long-term debt as of December 31, 2017 were as follows (in thousands):

Years ended December 31,	Future Minimum Payments
2018	$	9,582
2019	9,150
2020	9,150
2021	9,150
2022 and thereafter	332,450
Total minimum payments	$	369,482
Less: interest	(64,482		)
Less: unamortized discount	(138,994		)
Less: current portion	—
Long Term Debt	$	166,006