Debt (Tables)

12 Months Ended

Dec. 31, 2022

Convertible Senior Secured Notes due 2024

Summary of Outstanding Note Balances

The outstanding 2024 Note balances as of December 31, 2022 and December 31, 2021 consisted of the following:

(In thousands)	December 31, 2022			December 31, 2021
Liability component:
Principal	$	207,000		$	207,000
Less: debt discount and debt issuance costs, net		(39,969	)		(55,975	)
Net carrying amount		167,031			151,025
Equity component		18,257		$	18,257
Derivative liability-conversion Option	$	—		$	37

Schedule of Interest Expense Recognized Related to the Notes

The following table sets forth total interest expense recognized related to the 2024 Notes for the years ended December 31, 2022 and 2021:

(In thousands)	Year ended December 31, 2022		Year ended December 31, 2021
Contractual interest expense	$	12,420	$	12,420
Amortization of debt issuance costs		1,137		952
Amortization of debt discount		14,870		12,454
Total interest expense	$	28,427	$	25,826

Convertible Senior Notes due 2021

Schedule of Interest Expense Recognized Related to the Notes

The following table sets forth total interest expense recognized related to the 2021 Notes for the years ended December 31, 2022 and 2021:

(In thousands)	Year ended December 31, 2022		Year ended December 31, 2021
Contractual interest expense	$	—	$	428
Amortization of debt issuance costs		—		95
Amortization of debt discount		—		934
Total interest expense	$	—	$	1,457