Convertible Notes Payable (Tables)

6 Months Ended

Jun. 30, 2019

Debt Disclosure [Abstract]

Schedule of outstanding balances of convertible notes

The outstanding balances of the Convertible Notes as of June 30, 2019 consisted of the following (in thousands):

	2024 Convertible Notes
Liability component:
Principal	$	305,000
Less: debt discount and issuance costs, net	$	(117,566	)
Net carrying amount	$	187,434
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 three and six months ended June 30, 2019 and 2018 (in thousands):

	Three Months Ended June 30,				Six Months Ended June 30,
	2019		2018		2019		2018
Contractual interest expense	$	2,288	$	2,293	$	4,575	$	4,580
Amortization of debt discount	3,737		3,267		7,351		6,425
Amortization of debt issuance costs	140		123		276		243
Total interest expense	$	6,165	$	5,683	$	12,202	$	11,248

Schedule of future minimum payments on long-term debt

Future minimum payments on the Company’s long-term debt as of June 30, 2019 are as follows (in thousands):

Years ended December 31,	Future Minimum Payments
2019	$	4,575
2020	9,150
2021	9,150
2022	9,150
2023	9,150
2024 and Thereafter	314,150
Total minimum payments	$	355,325
Less: interest	(50,325		)
Less: unamortized discount	(117,566		)
Less: current portion	—
Long Term Debt	$	187,434