Convertible Notes (Tables)

9 Months Ended

Sep. 30, 2020

Debt Disclosure [Abstract]

Schedule of convertible notes

The Company’s convertible notes are shown in the following table:

	As of
(In thousands)	September 30, 2020		December 31, 2019
2023 Notes	$	172,500	$	172,500
Unamortized discount - 2023 Notes	(17,143)		(22,163)
Unamortized debt issuance costs - 2023 Notes	(1,175)		(1,549)
Total convertible notes	154,182		148,788
Less current portion	—		—
Total long-term convertible notes	$	154,182	$	148,788

Schedule of interest expense on notes

Interest expense related to the notes for the three and nine months ended September 30, 2020 and 2019 was as follows:

	Three Months Ended				Nine Months Ended
	September 30,				September 30,
(In thousands)	2020		2019		2020		2019
2023 Notes coupon interest at a rate of 1.375%	$	593	$	593	$	1,779	$	1,779
2023 Notes amortization of discount and debt issuance costs at an additional effective interest rate of 4.9%	1,823		1,725		5,394		5,104
Total interest expense on convertible notes	$	2,416	$	2,318	$	7,173	$	6,883