Consolidated Statements of Operations and Comprehensive Loss - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Collaboration Revenue—from related party	$ 46,826	$ 72,832	$ 34,034
Revenue from Contract with Customer, Product and Service [Extensible List]	Collaboration Revenues From Related Party [Member]	Collaboration Revenues From Related Party [Member]	Collaboration Revenues From Related Party [Member]
Operating expenses:
Research and development	$ 164,248	$ 137,017	$ 62,105
General and administrative	43,834	36,345	18,233
Total operating expenses	208,082	173,362	80,338
Loss from operations	(161,256)	(100,530)	(46,304)
Other income (expense):
Interest and other income	6,624	488	826
Interest and other expense	(176)	(175)	(115)
Total other income	6,448	313	711
Net loss	(154,808)	(100,217)	(45,593)
Other comprehensive loss:
Unrealized (loss) gain on marketable securities	(4,289)	(532)	(134)
Total comprehensive loss	(159,097)	(100,749)	(45,727)
Reconciliation of net loss to net loss attributable to common stockholders:
Net Loss	(154,808)	(100,217)	(45,593)
Deemed dividend from exchange of convertible preferred stock	0	0	(9,050)
Net loss attributable to common stockholders	$ (154,808)	$ (100,217)	$ (54,643)
Net loss per share, basic	$ (2.87)	$ (2.09)	$ (3.15)
Net loss per share, diluted	$ (2.87)	$ (2.09)	$ (3.15)
Weighted average common shares outstanding, diluted	53,933,229	47,989,023	17,349,582
Weighted average common shares outstanding, basic	53,933,229	47,989,023	17,349,582