Debt (Tables)

6 Months Ended

Jun. 30, 2020

Debt Disclosure [Abstract]

Schedule of convertible debt obligations

The Company’s outstanding debt obligations as of June 30, 2020 and December 31, 2019 were as follows: 

	June 30,		December 31,
	2020		2019
Revolving credit facility balance	$	275,000	$	260,000
Convertible Notes due 2023	$	345,000	$	345,000
Unaccreted discount on Convertible Notes due 2023	(28,811)		(33,491)
Unamortized issuance costs on Convertible Notes due 2023	(5,158)		(5,996)
Convertible Notes due 2023 carrying value(1)	$	311,031	$	305,513

⁽¹⁾ The effective interest rate on the liability component of the Convertible Notes due 2023 was 6% for the three and six months ended June 30, 2020 and 2019.

Schedule of interest expense

Interest expense was comprised of the following and is included in other expense, net in the condensed consolidated statement of operations:

	Three Months Ended				Six Months Ended
	June 30,				June 30,
	2020		2019		2020		2019
Accretion of debt discount	$	2,349	$	3,784	$	4,680	$	7,542
Interest on revolving credit facility	2,009		1,196		4,527		1,196
Coupon interest	1,510		2,264		3,011		4,528
Amortization of issuance costs	633		862		1,264		1,720
Undrawn and other fees	133		157		286		373
Total interest expense	$	6,634	$	8,263	$	13,768	$	15,359