Condensed Consolidated Statements of Operations and Comprehensive Loss - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Income Statement [Abstract]
Collaboration revenue	$ 7,802	$ 2,036
Operating expenses:
Research and development	47,275	35,806
General and administrative	18,328	12,782
Total operating expenses	65,603	48,588
Other income (expense):
Interest income	2,621	18
Interest expense	(983)	(724)
Total other income (expense), net	1,638	(706)
Net loss	(56,163)	(47,258)
Unrealized gain on marketable securities	164	0
Comprehensive loss	(55,999)	(47,258)
Net loss attributable to common stockholders — basic	(56,163)	(47,258)
Net loss attributable to common stockholders — diluted	$ (56,163)	$ (47,258)
Net loss per share attributable to common stockholders — basic (in dollars per share)	$ (0.52)	$ (0.59)
Net loss per share attributable to common stockholders — diluted (in dollars per share)	$ (0.52)	$ (0.59)
Weighted-average number of shares of common stock used in net loss per share attributable to common stockholders — basic (in shares)	107,514,655	79,928,591
Weighted-average number of shares of common stock used in net loss per share attributable to common stockholders — diluted (in shares)	107,514,655	79,928,591