Current and Long-Term Debt (Tables)

9 Months Ended

Sep. 30, 2022

Current and Long-Term Debt

Schedule of Long-term Debt Instruments

	September 30, 2022						December 31, 2021
	2026 Convertible Secured Notes		2026 Convertible Notes		2023 Convertible Notes		2026 Convertible Secured Notes		2026 Convertible Notes		2023 Convertible Notes
	(in thousands)
Liability component
Principal	$	111,143	$	115,349	$	109,808	$	500,000	$	115,349	$	113,655
Unamortized debt issuance costs		(1,857)		(1,778)		(356)		(7,132)		(2,313)		(816)
Unamortized debt discount		—		—		—		(141,303)		(30,228)		(7,430)
Net carrying amount	$	109,286	$	113,571	$	109,452	$	351,565	$	82,808		105,409
Equity component, net of issuance costs*		—		—		—	$	147,458	$	62,841	$	97,072

*Recorded as a reduction of Additional paid-in capital upon the adoption of ASU 2020-06.

Schedule of fair value of the convertible notes

	September 30, 2022		December 31, 2021
	(in thousands)
2026 Convertible Secured Notes	$	116,112	$	543,370
2026 Convertible Notes	$	87,125	$	69,492
2023 Convertible Notes	$	106,963	$	107,727

Schedule of initial conversion of convertible debt

	Initial conversion rate	Approximate conversion price
2026 Convertible Secured Notes	47.7612	$20.94
2026 Convertible Notes	9.2123	$108.55
2023 Convertible Notes	5.0358	$198.58

Schedule of interest expenses on convertible debt

	Three Months Ended September 30, 2022								Nine Months Ended September 30, 2022
	2026 Convertible Secured Notes		2026 Convertible Notes		2023 Convertible Notes		Total		2026 Convertible Secured Notes		2026 Convertible Notes		2023 Convertible Notes		Total
	(in thousands)
Contractual interest expense	$	3,127	$	577	$	892	$	4,596	$	11,877	$	1,731	$	2,729	$	16,337
Amortization of debt issuance costs		407		117		117		641		1,540		349		353		2,242
Accretion of debt discount		—		—		—		—		—		—		—		—
Total interest expense	$	3,534	$	694	$	1,009	$	5,237	$	13,417	$	2,080	$	3,082	$	18,579
	Three Months Ended September 30, 2021								Nine Months Ended September 30, 2021
	2026 Convertible Secured Notes		2026 Convertible Notes		2023 Convertible Notes		Total		2026 Convertible Secured Notes		2026 Convertible Notes		2023 Convertible Notes		Total
	(in thousands)
Contractual interest expense	$	2,090	$	876	$	2,487	$	5,453	$	2,090	$	3,176	$	9,962	$	15,228
Amortization of debt issuance costs		149		152		333		634		149		538		1,303		1,990
Accretion of debt discount		2,993		1,990		3,025		8,008		2,993		7,033		11,859		21,885
Total interest expense	$	5,232	$	3,018	$	5,845	$	14,095	$	5,232	$	10,747	$	23,124	$	39,103