Consolidated Statements of Operations and Comprehensive Loss - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Income Statement [Abstract]
Collaboration revenue		$ 7,871
Operating expenses:
Research and development	$ 55,913	25,738
General and administrative	19,638	17,422
Acquired in-process research and development		46,910
Total operating expenses	75,551	90,070
Loss from operations	(75,551)	(82,199)
Other income (expense):
Interest income	467	144
Gain on disposal of long-lived assets		7,493
Other income	2,468	779
Change in fair value of CVR liability	343	(1,025)
Total other income, net	3,278	7,391
Net loss and comprehensive loss	(72,273)	(74,808)
Net loss attributable to common shareholders	$ (72,273)	$ (179,208)
Net loss per share attributable to common stockholders, basic and diluted	$ (1.87)	$ (16.17)
Weighted average common shares outstanding, basic and diluted	38,730,813	11,081,257