CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE LOSS - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Collaboration revenue	$ 1,225	$ 209	$ 3,794	$ 800
Operating expenses:
Research and development	43,990	40,340	125,927	121,185
General and administrative	11,208	14,101	37,609	37,860
Total operating expenses	55,198	54,441	163,536	159,045
Loss from operations	(53,973)	(54,232)	(159,742)	(158,245)
Other income:
Interest income	1,141	697	3,066	1,984
Amortization of premiums and discount on short-term investments	752	885	1,621	3,201
Change in fair value of short-term investment — related party	1,454	215	(107)	(544)
Other income, net	44	(83)	99	(2)
Total other income, net	3,391	1,714	4,679	4,639
Net loss attributable to common stockholders, basic	(50,582)	(52,518)	(155,063)	(153,606)
Net loss attributable to common stockholders, diluted	$ (50,582)	$ (52,518)	$ (155,063)	$ (153,606)
Net loss per share attributable to common stockholders, basic (in dollars per share)	$ (0.32)	$ (0.44)	$ (1.11)	$ (1.34)
Net loss per share attributable to common stockholders, diluted (in dollars per share)	$ (0.32)	$ (0.44)	$ (1.11)	$ (1.34)
Weighted-average common shares outstanding, basic (in shares)	160,503,183	119,764,270	139,244,743	114,492,416
Weighted-average common shares outstanding, diluted (in shares)	160,503,183	119,764,270	139,244,743	114,492,416
Comprehensive loss:
Net loss	$ (50,582)	$ (52,518)	$ (155,063)	$ (153,606)
Change in unrealized loss on investments, net of tax	43	92	32	36
Comprehensive loss	(50,539)	(52,426)	(155,031)	(153,570)
Related Party
Collaboration revenue	1,179	0	3,748	0
Nonrelated Party
Collaboration revenue	$ 46	$ 209	$ 46	$ 800