Convertible Notes Payable (Tables)

12 Months Ended

Dec. 31, 2019

Debt Disclosure [Abstract]

Schedule of outstanding balance on convertible notes

The outstanding balances of the Convertible Notes consisted of the following (in thousands):

	December 31, 2019			December 31, 2018
Liability component:
Principal	$	305,000		$	305,000
Less: debt discount and issuance costs, net	(109,409		)	(125,194		)
Net carrying amount	$	195,591		$	179,806
Equity component:	$	134,450		$	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, 2019, 2018, and 2017 (in thousands):

	Twelve Months Ended December 31,
	2019		2018		2017
Contractual interest expense	$	9,150	$	9,150	$	3,482
Amortization of debt discount	15,213		13,300		4,641
Amortization of debt issuance	572		505		175
Total interest expense	$	24,935	$	22,955	$	8,298

Schedule of future minimum payments on long-term debt

Future minimum payments on our long-term debt as of December 31, 2019 are as follows (in thousands):

Years ended December 31,	Future Minimum Payments
2020	$	9,150
2021	9,150
2022	9,150
2023	9,150
2024 and thereafter	314,150
Total minimum payments	$	350,750
Less: interest	(45,750		)
Less: unamortized discount	(109,409		)
Less: current portion	—
Long Term Debt	$	195,591