Debt Obligations (Tables)

3 Months Ended

Mar. 31, 2020

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,			December 31,
	2020			2019
Principal	$	200,000		$	200,000
Unamortized debt discount		(28,665	)		(31,132	)
Unamortized debt issuance costs		(2,480	)		(2,711	)
Net carrying amount of the liability component	$	168,855		$	166,157

Schedule of Interest Expense

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

	Three Months Ended March 31,
	2020		2019
Contractual interest expense	$	875	$	875
Amortization of debt discount		2,467		2,328
Amortization of debt issuance costs		231		230
Total interest expense related to the Notes	$	3,573	$	3,433