Condensed Consolidated Statements of Operations and Comprehensive Loss (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Income Statement [Abstract]
Revenues	$ 399	$ 988	$ 1,039	$ 3,667
Operating expenses:
Research and development	58,344	40,640	111,685	79,108
General and administrative	24,838	13,343	45,666	25,532
Total operating expenses	83,182	53,983	157,351	104,640
Loss from operations	(82,783)	(52,995)	(156,312)	(100,973)
Other income (expense):
Interest income	8,741	2,107	16,061	4,145
Other expense, net	(13)	(91)	(264)	(146)
Total other income, net	8,728	2,016	15,797	3,999
Loss before equity method investment	(74,055)	(50,979)	(140,515)	(96,974)
Loss on equity method investment	0	0	(470)	0
Net loss	$ (74,055)	$ (50,979)	$ (140,985)	$ (96,974)
Net loss per share:
Net loss per share - basic	$ (0.94)	$ (0.94)	$ (1.86)	$ (1.79)
Net loss per share - diluted	$ (0.94)	$ (0.94)	$ (1.86)	$ (1.79)
Weighted average shares - basic	79,008	54,275	75,690	54,092
Weighted average shares - diluted	79,008	54,275	75,690	54,092
Other comprehensive income (loss):
Unrealized gain (loss) on investment securities	$ (340)	$ 809	$ (1,167)	$ 2,226
Comprehensive loss	$ (74,395)	$ (50,170)	$ (142,152)	$ (94,748)