CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE LOSS (Unaudited) - USD ($) $ in Thousands		3 Months Ended
		Mar. 31, 2025	Mar. 31, 2024
Income Statement [Abstract]
Collaboration Revenues		$ 22,100	$ 10,287
Revenue from Contract with Customer, Product and Service [Extensible Enumeration]		us-gaap:RelatedPartyMember	us-gaap:RelatedPartyMember
Operating expenses:
Research and development		$ 80,255	$ 48,819
General and administrative	[1]	16,271	14,374
Impairment of long-lived assets		0	4,925
Total operating expenses		96,526	68,118
Loss from operations		(74,426)	(57,831)
Other income (expense):
Interest and other Income		8,917	9,343
Interest and other expense		(72)	(69)
Total other income:		8,845	9,274
Net loss		(65,581)	(48,557)
Other comprehensive loss:
Unrealized gain (loss) on marketable securities		1,427	(1,225)
Total comprehensive loss		(64,154)	(49,782)
Net loss		$ (65,581)	$ (48,557)
Net loss per share, basic		$ (0.82)	$ (0.69)
Net loss per share, diluted		$ (0.82)	$ (0.69)
Weighted average common shares outstanding, basic		80,146,531	70,770,320
Weighted average common shares outstanding, diluted		80,146,531	70,770,320

[1] General and administrative expense for the quarter ended March 31, 2025 and 2024 is inclusive of $6.7 million and $5.9 million of stock-based compensation expense, respectively.