DEBT (Tables)

12 Months Ended

Dec. 31, 2020

Debt

Schedule of debt

Our debt consists of:

	December 31,
(In thousands)	2020		2019
2023 Notes	$	240,984	$	240,984
2025 Notes		192,500		192,500
Total debt		433,484		433,484
Unamortized debt discount and issuance costs		(47,967)		(56,364)
Net long-term debt	$	385,517	$	377,120

Aggregate scheduled maturities of long-term debt

The aggregate scheduled maturities of our long-term debt as of December 31, 2020 are as follows:

(In thousands)
Years ending December 31:
2021 to 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:

	December 31,
(In thousands)	2020		2019
Liability component
Principal	$	192,500	$	192,500
Debt discount and issuance costs, net		(46,766)		(54,597)
Net carrying amount	$	145,734	$	137,903
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 years ended December 31, 2020, 2019 and 2018:

	Year Ended December 31,
(In thousands)	2020		2019		2018
Contractual interest expense	$	4,813	$	4,813	$	4,799
Amortization of debt issuance costs		601		551		505
Amortization of debt discount		7,230		6,618		6,071
Total interest and amortization expense	$	12,644	$	11,982	$	11,375