Debt (Tables)

3 Months Ended

Mar. 31, 2019

Debt Disclosure [Abstract]

Summary of Components of Debt Obligations

The table below summarizes the components of the Company’s debt: 

	March 31, 2019			December 31, 2018
2023 Convertible Notes	$	316,250		$	316,250
Total debt	316,250			316,250
Less: deferred debt discount	(41,890		)	(43,998		)
Less: deferred debt issue costs	(6,323		)	(6,681		)
Long-term debt, net (1)	$	268,037		$	265,571
Additional paid-in capital	$	35,306		$	35,306
Discount attribution to equity	(1,175		)	(1,175		)
Equity component, net	$	34,131		$	34,131

⁽¹⁾  There were no current portions of long-term debt as of March 31, 2019 and December 31, 2018.

Summary of Interest Expense

The table below summarizes the amount of interest cost recognized by us for both the contractual interest expense and amortization of the debt discount for the 2023 Convertible Notes:

	Three Months Ended March 31,
	2019		2018
	(in thousands)
Contractual interest expense	$	1,581	$	—
Amortization of debt discount (1)	2,108		—
Total	$	3,689	$	—

⁽¹⁾  The effective interest rate of the liability component was 5.45% as of March 31, 2019.