Long-Term Debt (Tables)

9 Months Ended

Sep. 30, 2019

Long-Term Debt

Schedule of convertible notes payable

Total convertible notes payable consisted of the following at (in thousands):

	September 30,		December 31,
	2019		2018
Principal amount of the Notes	$	325,000	$	325,000
Unamortized debt issuance costs		(4,745)		(5,813)
Total convertible notes payable	$	320,255	$	319,187

Schedule of interest expense

Interest expense incurred in connection with the Notes consisted of the following (in thousands):

	Three Months Ended				Nine Months Ended
	September 30,				September 30,
	2019		2018		2019		2018
Coupon interest at 3.75%	$	3,047	$	3,047	$	9,141	$	9,141
Amortization of debt issuance costs		356		356		1,068		1,068
Total interest expense on the Notes	$	3,403	$	3,403	$	10,209	$	10,209