Notes Payable (Tables)

3 Months Ended

Mar. 31, 2020

Long-term Debt, Unclassified [Abstract]

Schedule of net carrying amount of the liability and equity components of the Notes

The net carrying amount of the liability component of the Notes was as follows:

	As of		As of
	March 31,		December 31,
	2020		2019
	(In thousands)
Principal	$	549,998	$	549,999
Unamortized discount	(78,953)		(84,647)
Unamortized issuance costs	(6,678)		(7,162)
Net carrying amount	$	464,367	$	458,190

The net carrying amount of the equity component of the Notes was as follows:

	As of		As of
	March 31,		December 31,
	2020		2019
	(In thousands)
Proceeds allocated to the conversion options (debt discount)	$	119,434	$	119,435
Issuance costs	(2,819)		(2,819)
Net carrying amount	$	116,615	$	116,616

Schedule of interest expense recognized related to the Notes

The following table sets forth the interest expense recognized related to the Notes:

	Three Months Ended March 31,
	2020		2019
	(In thousands)
Contractual interest expense	$	344	$	344
Amortization of debt issuance costs	484		458
Amortization of debt discount	5,694		5,383
Total interest expense related to the Notes	$	6,522	$	6,185