Convertible Senior Notes and Capped Call Transactions (Tables)

6 Months Ended

Jun. 30, 2021

Debt Disclosure [Abstract]

Schedule of Net Carrying Amount of Liability and Equity Components of Convertible Notes

The net carrying amount of the liability and equity components of the 2025 Notes was as follows (in thousands):

	June 30, 2021
	(unaudited)
Liability component
Principal	$	253,000
Unamortized discount	(25,616)
Unamortized issuance costs	(5,527)
Net carrying amount	$	221,857
Equity component, net of discount and issuance costs	$	30,794

Schedule of Interest Expense

The interest expense recognized related to the 2025 Notes for the three and six months ended June 30, 2021 and 2020 was as follows (in thousands):

	Three Months Ended June 30,				Six Months Ended June 30,
	2021		2020		2021		2020
	(unaudited)				(unaudited)
Contractual interest expense	$	790	$	430	$	1,580	$	430
Amortization of debt discount	1,405		641		2,794		641
Amortization of debt issuance costs	303		138		603		138
Total	$	2,498	$	1,209	$	4,977	$	1,209