Long-Term Debt (Tables)

12 Months Ended

Dec. 31, 2020

Debt Disclosure [Abstract]

Schedule of Convertible Notes Payable

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

	December 31, 2020		December 31, 2019
Principal amount of Notes	$	325,000	$	325,000
Unamortized debt issuance costs	(2,965)		(4,389)
Total convertible notes payable	$	322,035	$	320,611

Schedule of Interest Expense

Interest expense incurred in connection with the Notes consisted of the following for the years ended December 31 (in thousands):

	2020		2019		2018
Coupon interest at 3.75%	$	12,188	$	12,188	$	12,188
Amortization of debt issuance costs	1,424		1,424		1,424
Total interest expense on Notes	$	13,612	$	13,612	$	13,612