Condensed Consolidated Statements of Operations - USD ($) $ in Thousands		3 Months Ended		6 Months Ended
		Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Revenue:
Total revenue		$ 0	$ 688	$ 0	$ 886
Operating expenses:
Research and development	[1]	32,636	17,386	67,564	31,162
General and administrative		11,511	12,062	24,357	17,290
Acquired in-process research and development		0	130,486	0	130,486
Total operating expenses		44,147	159,934	91,921	178,938
Loss from operations		(44,147)	(159,246)	(91,921)	(178,052)
Other income (expense):
Interest income		5,920	350	10,352	770
Other expense, net		(610)	(8)	(1,093)	(80)
Total other income (expense)		5,310	(57,828)	9,259	(57,480)
Loss before income tax expense		(38,837)	(217,074)	(82,662)	(235,532)
Income tax (expense) benefit		0	(7)	(32)	29
Net loss		$ (38,837)	$ (217,081)	$ (82,694)	$ (235,503)
Net loss per share, basic (in dollars per share)		$ (0.86)	$ (56.79)	$ (2.02)	$ (62.03)
Net loss per share, diluted (in dollars per share)		$ (0.86)	$ (56.79)	$ (2.02)	$ (62.03)
Weighted-average common shares outstanding, basic (in shares)		45,316,264	3,822,605	40,914,463	3,796,699
Weighted-average common shares outstanding, diluted (in shares)		45,316,264	3,822,605	40,914,463	3,796,699
Forward contract liability
Other income (expense):
Change in fair value of forward contract liability		$ 0	$ (58,170)	$ 0	$ (58,170)
Development fee and royalty
Revenue:
Total revenue		$ 0	$ 688	$ 0	$ 886

[1] Includes $9.4 million and $26.5 million in related party expenses for the three and six months ended June 30, 2024, respectively, and $1.4 million related party expenses for the three and six months ended June 30, 2023.