Condensed Consolidated Statements of Operations and Comprehensive Loss - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Income Statement [Abstract]
Collaboration revenue	$ 2,293	$ 10,654	$ 11,538	$ 18,456
Operating expenses:
Research and development	17,245	48,968	35,931	96,243
General and administrative	10,503	18,187	22,063	36,515
Total operating expenses	27,748	67,155	57,994	132,758
Other income (expense):
Interest income	2,170	3,219	4,867	5,840
Interest expense	(983)	(1,025)	(1,985)	(2,008)
Total other income, net	1,187	2,194	2,882	3,832
Net loss	(24,268)	(54,307)	(43,574)	(110,470)
Unrealized gain (loss) on marketable securities	19	(61)	(82)	103
Comprehensive loss	(24,249)	(54,368)	(43,656)	(110,367)
Net loss attributable to common stockholders — basic	(24,268)	(54,307)	(43,574)	(110,470)
Net loss attributable to common stockholders — diluted	$ (24,268)	$ (54,307)	$ (43,574)	$ (110,470)
Net loss per share attributable to common stockholders — basic (in dollars per share)	$ (0.20)	$ (0.47)	$ (0.36)	$ (0.99)
Net loss per share attributable to common stockholders — diluted (in dollars per share)	$ (0.20)	$ (0.47)	$ (0.36)	$ (0.99)
Weighted-average number of shares of common stock used in net loss per share attributable to common stockholders — basic (in shares)	122,440,124	115,608,156	121,932,540	111,583,765
Weighted-average number of shares of common stock used in net loss per share attributable to common stockholders — diluted (in shares)	122,440,124	115,608,156	121,932,540	111,583,765