CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE LOSS (Unaudited) - 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 Revenues	$ 25,650	$ 16,513	$ 35,937	$ 25,979
Revenue from Contract with Customer, Product and Service [Extensible Enumeration]	us-gaap:RelatedPartyMember	us-gaap:RelatedPartyMember	us-gaap:RelatedPartyMember	us-gaap:RelatedPartyMember
Operating expenses:
Research and development	$ 59,202	$ 45,767	$ 108,021	$ 87,994
General and administrative	17,373	14,129	31,747	26,694
Impairment of long-lived assets	0	0	4,925	0
Total operating expenses	76,575	59,896	144,693	114,688
Loss from operations	(50,925)	(43,383)	(108,756)	(88,709)
Other income (expense):
Interest and other Income	8,924	4,632	18,268	9,085
Interest and other expense	(61)	(48)	(131)	(103)
Total other income:	8,863	4,584	18,137	8,982
Net loss	(42,062)	(38,799)	(90,619)	(79,727)
Other comprehensive loss:
Unrealized (loss) gain on marketable securities	(322)	(597)	(1,547)	1,314
Total comprehensive loss	(42,384)	(39,396)	(92,166)	(78,413)
Net loss	$ (42,062)	$ (38,799)	$ (90,619)	$ (79,727)
Net loss per share, basic and diluted	$ (0.58)	$ (0.67)	$ (1.26)	$ (1.37)
Net loss per share, basic and diluted	$ (0.58)	$ (0.67)	$ (1.26)	$ (1.37)
Weighted average common shares outstanding, basic and diluted	73,059,398	58,326,963	71,908,963	58,257,387
Weighted average common shares outstanding, basic and diluted	73,059,398	58,326,963	71,908,963	58,257,387