Debt (Tables)

6 Months Ended

Jun. 30, 2021

Debt

Schedule of debt

Our debt consists of:

	June 30,		December 31,
(In thousands)	2021		2020
2023 Notes	$	240,984	$	240,984
2025 Notes		192,500		192,500
Total debt		433,484		433,484
Unamortized debt discount and issuance costs		(43,495)		(47,967)
Net long-term debt	$	389,989	$	385,517

Aggregate scheduled maturities of long-term debt

The aggregate scheduled maturities of our long-term debt as of June 30, 2021 were as follows:

(In thousands)
Years ending December 31:
Remainder of 2021	$	—
2022		—
2023		240,984
2024		—
2025		192,500
Total	$	433,484

2025 Notes

Debt

Summary of liability and equity components of convertible notes

Our outstanding 2025 Notes balances consisted of the following:

	June 30,		December 31,
(In thousands)	2021		2020
Liability component
Principal	$	192,500	$	192,500
Debt discount and issuance costs, net		(42,583)		(46,766)
Net carrying amount	$	149,917	$	145,734
Equity component, net	$	65,361	$	65,361

Schedule of components of interest expense

The following table sets forth total interest expense recognized related to the 2025 Notes for the three and six months ended June 30, 2021 and 2020:

	Three Months Ended June 30,				Six Months Ended June 30,
(In thousands)	2021		2020		2021		2020
Contractual interest expense	$	1,203	$	1,203	$	2,406	$	2,406
Amortization of debt issuance costs		162		149		321		294
Amortization of debt discount		1,951		1,786		3,862		3,535
Total interest and amortization expense	$	3,316	$	3,138	$	6,589	$	6,235