Condensed Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Costs and expenses
Research and development	$ 73,406	$ 62,119	$ 141,706	$ 118,068
General and administrative	26,328	19,307	49,741	38,928
Total costs and expenses	99,734	81,426	191,447	156,996
Loss from operations	(99,734)	(81,426)	(191,447)	(156,996)
Other income
Interest income, net	385	75	491	196
Net Loss	$ (99,349)	$ (81,351)	$ (190,956)	$ (156,800)
Net Loss Per Share of Common Stock, Basic	$ (0.63)	$ (0.53)	$ (1.21)	$ (1.04)
Net Loss Per Share of Common Stock, Diluted	$ (0.63)	$ (0.53)	$ (1.21)	$ (1.04)
Weighted Average Shares of Common Stock Outstanding, Basic	157,274	153,751	157,194	150,571
Weighted Average Shares of Common Stock Outstanding, Diluted	157,274	153,751	157,194	150,571