Statements of Operations - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Operating expenses
Selling, general and administrative expenses	$ 26,019	$ 14,394
Research and development expenses	61,864	91,812
Total operating expenses	87,883	106,206
Loss from operations	(87,883)	(106,206)
Other (expense) income
Other (expense) income	(1,492)	(19,132)
Interest (expense) income	(258)	127
Loss before income taxes	(89,633)	(125,211)
Net loss	$ (89,633)	$ (125,211)
Loss per share attributable to common shareholders
Basic (in dollars per share)	$ (0.46)	$ (0.72)
Diluted (in dollars per share)	$ (0.43)	$ (0.72)
Weighted average number of common shares outstanding
Basic (in shares)	196,503	174,325
Diluted (in shares)	196,503	174,325