Condensed Consolidated Statements of Operations and Comprehensive Income (Loss) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Revenue:
Collaboration revenue - related party	$ 1,493	$ 4,648
Type of Revenue [Extensible List]	us-gaap:LicenseAndServiceMember	us-gaap:LicenseAndServiceMember
Grant revenue		$ 1,070
Total revenue	1,493	5,718
Operating expenses:
Research and development expenses	39,649	29,303
General and administrative expenses	18,571	11,741
Collaboration (profit) loss sharing - related party	(976)	0
Total operating expenses	57,244	41,044
Income (Loss) from operations	(55,751)	(35,326)
Other (expense) income:
Interest income	384	966
Interest expense	(912)	(696)
Other (expense) income	(345)	(409)
Total other (expense) income, net	(873)	(139)
Net income (loss)	$ (56,624)	$ (35,465)
Net income (loss) per share attributable to common stockholders, basic	$ (0.61)	$ (0.39)
Weighted average common shares outstanding, basic	92,164,419	91,527,800
Net loss per share attributable to common stockholders, basic and diluted	$ (0.61)	$ (0.39)
Weighted average common shares outstanding, basic and diluted	92,164,419	91,527,800
Net income (loss)	$ (56,624)	$ (35,465)
Other comprehensive income (loss):
Unrealized gain (loss) on investments, net of tax of $0	(155)	32
Total other comprehensive income (loss)	(155)	32
Comprehensive income (loss)	$ (56,779)	$ (35,433)