Long-Term Debt (Tables)

9 Months Ended

Sep. 30, 2021

Debt Disclosure [Abstract]

Schedule of convertible notes payable

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

	September 30, 2021		December 31, 2020
Principal amount of Notes	$	325,000	$	325,000
Unamortized debt issuance costs	(1,898)		(2,965)
Total convertible notes payable	$	323,102	$	322,035

Schedule of interest expense

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

	Three Months Ended September 30,				Nine Months Ended September 30,
	2021		2020		2021		2020
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 Notes	$	3,403	$	3,403	$	10,209	$	10,209