Condensed Consolidated Statements of Operations and Comprehensive Loss - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Income Statement [Abstract]
Collaboration revenue	$ 2,036	$ 11
Operating expenses:
Research and development	35,806	27,415
General and administrative	12,782	7,208
Total operating expenses	48,588	34,623
Other income (expense):
Interest income	18	12
Interest expense	(724)	(93)
Total other income (expense), net	(706)	(81)
Net loss	(47,258)	(34,693)
Net loss attributable to common stockholders - basic	(47,258)	(34,693)
Net loss attributable to common stockholders - diluted	$ (47,258)	$ (34,693)
Net loss per share attributable to common stockholders - basic (in dollars per share)	$ (0.59)	$ (0.50)
Net loss per share attributable to common stockholders - diluted (in dollars per share)	$ (0.59)	$ (0.50)
Weighted-average number of shares of common stock used in net loss per share attributable to common stockholders - basic (in shares)	79,928,591	68,987,857
Weighted-average number of shares of common stock used in net loss per share attributable to common stockholders - diluted (in shares)	79,928,591	68,987,857