CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE LOSS - USD ($) shares in Thousands, $ in Thousands	3 Months Ended				6 Months Ended		9 Months Ended
	Sep. 30, 2022	Jun. 30, 2022	Sep. 30, 2021	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Revenues:
Total revenues	$ 15,375		$ 9,210				$ 67,615	$ 41,864
Operating expenses:
Research and development	59,181		33,147				154,885	102,149
Selling, general and administrative	33,623		10,297				74,064	30,234
Total operating expenses	92,804		43,444				228,949	132,383
Loss from operations	(77,429)		(34,234)				(161,334)	(90,519)
Investment income, net	1,539		11				2,183	35
Non-cash interest expense on liability related to the sale of future royalties and convertible senior notes	(867)		(2,751)				(3,194)	(10,952)
Interest expense on convertible senior notes								(47)
Other (expense) income, net	(998)		(365)				(1,576)	(648)
Net loss	$ (77,755)	$ (62,021)	$ (37,339)	$ (30,741)			$ (163,921)	$ (102,131)
Basic net loss per common share	$ (0.31)		$ (0.18)				$ (0.65)	$ (0.51)
Diluted net loss per common share		$ (0.24)		$ (0.15)	$ (0.34)	$ (0.32)
Basic weighted average common shares outstanding (in shares)	253,511		204,844				253,371	201,212
Diluted weighted average common shares outstanding (in shares)		253,336		199,890	253,263	199,365
Total comprehensive loss	$ (77,755)		$ (37,339)				$ (163,921)	$ (102,131)
License and milestone fees
Revenues:
Total revenues	7,382		2,677				45,247	3,086
Non-cash royalty revenue related to the sale of future royalties
Revenues:
Total revenues	$ 7,993		$ 6,533				21,537	38,768
Research and development support
Revenues:
Total revenues							$ 831	$ 10