Convertible Senior Notes (Tables)

6 Months Ended

Jun. 30, 2018

Carrying Value of Convertible Senior Notes

The carrying value of the Company’s convertible senior notes is as follows (in thousands):

	June 30, 2018			December 31, 2017
2.125% Convertible Senior Notes due 2021:
Principal amount	$	114,989		$	115,000
Unamortized debt discount		(11,617	)		(13,395	)
Unamortized debt issuance costs		(2,043	)		(2,355	)
Total convertible senior notes	$	101,329		$	99,250
Less: Current portion		(101,329	)		—
Total convertible senior notes, long term	$	—		$	99,250