Debt (Tables)

6 Months Ended

Jun. 30, 2023

Debt

Schedule of debt

					Debt
			Unaccreted		Issuance		Carrying
	Principal		Discount		Costs		Value
Convertible senior notes, due 2026	$	225,000	$	—	$	(3,909)	$	221,091
Convertible senior notes, due 2028		333,334		(122,877)		(4,707)		205,750
Advance funding arrangement		5,321		(32)		—		5,289
Other notes		300		(26)		—		274
Balance as of June 30, 2023	$	563,955	$	(122,935)	$	(8,616)	$	432,404

					Debt
			Unaccreted		Issuance		Carrying
	Principal		Discount		Costs		Value
Convertible senior notes, due 2026	$	425,000	$	—	$	(8,508)	$	416,492
Advance funding arrangement		15,670		(760)		—		14,910
Term loan facility, due 2029		10,000		—		—		10,000
Other notes		450		(87)		—		363
Balance as of December 31, 2022	$	451,120	$	(847)	$	(8,508)	$	441,765