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		$ 0	$ 0	$ 591	$ 0
Operating expenses:
Research and development	[1]	43,071	34,599	80,845	65,479
General and administrative		12,601	10,658	23,759	19,811
Total operating expenses		55,672	45,257	104,604	85,290
Loss from operations		(55,672)	(45,257)	(104,013)	(85,290)
Other income:
Amortization of premiums and discount on short-term investments		1,486	1,964	2,316	2,782
Interest income		611	635	1,287	1,910
Change in fair value of short-term investment — related party		(1,925)	263	(759)	(1,438)
Other income, net		39	41	81	83
Total other income, net		211	2,903	2,925	3,337
Net loss before income taxes		(55,461)	(42,354)	(101,088)	(81,953)
Benefit (provision for) from income taxes		134	(31)	0	171
Net loss attributable to common stockholders, basic		(55,327)	(42,385)	(101,088)	(81,782)
Net loss attributable to common stockholders, diluted		$ (55,327)	$ (42,385)	$ (101,088)	$ (81,782)
Net loss per share attributable to common stockholders, basic (in dollars per share)		$ (0.46)	$ (0.47)	$ (0.90)	$ (0.91)
Net loss per share attributable to common stockholders, diluted (in dollars per share)		$ (0.46)	$ (0.47)	$ (0.90)	$ (0.91)
Weighted-average common shares outstanding, basic (in shares)		119,188,866	90,467,298	111,827,522	89,769,970
Weighted-average common shares outstanding, diluted (in shares)		119,188,866	90,467,298	111,827,522	89,769,970
Comprehensive loss:
Net loss		$ (55,327)	$ (42,385)	$ (101,088)	$ (81,782)
Change in unrealized loss on investments, net of tax		24	(63)	(56)	116
Comprehensive loss		$ (55,303)	$ (42,448)	$ (101,144)	$ (81,666)

[1] (1) Includes related party amount of $0.3 million and $0.6 million for the three and six months ended June 30, 2023.