CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE LOSS - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Revenue:
Collaboration revenue - related party	$ 1,772	$ 2,963
Operating expenses:
Research and development - related party	100,894	56,886
General and administrative	35,182	25,805
Total operating expenses	136,076	82,691
Loss from operations	(134,304)	(79,728)
Other income (expense):
Interest and other income	4,916	318
Interest and other expense	(486)	(3)
Other income, net	4,430	315
Net loss	$ (129,874)	$ (79,413)
Net loss per share, basic (in dollars per share)	$ (4.05)	$ (6.66)
Net loss per share, diluted (in dollars per share)	$ (4.05)	$ (6.66)
Weighted-average shares used to compute basic net loss per share (in shares)	32,087,293	11,918,712
Weighted-average shares used to compute diluted net loss per share (in shares)	32,087,293	11,918,712
Change in unrealized loss on investments	$ (233)	$ (149)
Total other comprehensive loss	(233)	(149)
Total comprehensive loss	$ (130,107)	$ (79,562)