Debt Obligations (Tables)

3 Months Ended

Mar. 31, 2018

Debt Disclosure [Abstract]

Schedule of Net Carrying Amount of Liability Component

The net carrying amount of the liability component of the notes recorded in convertible senior notes, net on the condensed consolidated balance sheets was as follows (in thousands):

	March 31,
	2018
Principal	$	200,000
Unamortized debt discount		(47,435	)
Unamortized debt issuance costs		(4,319	)
Net carrying amount of the liability component	$	148,246

Schedule Of Interest Expense

The following table sets forth the interest expense related to the notes recognized in interest expense on the consolidated statements of operations (in thousands):

	Three Months Ended
	March 31,
	2018
Contractual interest expense	$	875
Amortization of debt discount		2,197
Amortization of debt issuance costs		229
Total interest expense related to the Notes	$	3,301