Condensed Consolidated Statements of Operations - USD ($) $ in Thousands		3 Months Ended
		Mar. 31, 2024	Mar. 31, 2023
Revenue:
Total revenue		$ 0	$ 198
Operating expenses:
Research and development	[1]	34,928	13,776
General and administrative		12,846	5,228
Total operating expenses		47,774	19,004
Loss from operations		(47,774)	(18,806)
Other income (expense):
Interest income		4,432	420
Other expense		(483)	(72)
Total other income (expense)		3,949	348
Loss before income tax expense		(43,825)	(18,458)
Income tax (expense) benefit		(32)	36
Net loss		$ (43,857)	$ (18,422)
Net loss per share, basic (in dollars per share)		$ 0.72
Net loss per share, diluted (in dollars per share)		$ 0.72
Weighted-average common shares outstanding, basic (in shares)		36,512,662	3,770,506
Weighted-average common shares outstanding, diluted (in shares)		36,512,662	3,770,506
Series A Preferred Stock
Other income (expense):
Net loss		$ (12,642)	$ 0
Net loss per share, basic (in dollars per share)		$ (28.93)	$ 0
Net loss per share, diluted (in dollars per share)		$ (28.93)	$ 0
Weighted-average common shares outstanding, basic (in shares)		437,037	0
Weighted-average common shares outstanding, diluted (in shares)		437,037	0
Series B Preferred Stock
Other income (expense):
Net loss		$ (4,810)	$ 0
Net loss per share, basic (in dollars per share)		$ (28.93)	$ 0
Net loss per share, diluted (in dollars per share)		$ (28.93)	$ 0
Weighted-average common shares outstanding, basic (in shares)		166,261	0
Weighted-average common shares outstanding, diluted (in shares)		166,261	0
Common Stock
Other income (expense):
Net loss		$ (26,405)	$ (18,422)
Net loss per share, basic (in dollars per share)		$ (0.72)	$ (4.89)
Net loss per share, diluted (in dollars per share)		$ (0.72)	$ (4.89)
Weighted-average common shares outstanding, basic (in shares)		36,262,662	2,614,843
Weighted-average common shares outstanding, diluted (in shares)		36,512,662	3,770,506
Development fee and royalty
Revenue:
Total revenue		$ 0	$ 198

[1] Includes $17.1 million in related party expenses for the three months ended March 31, 2024 and no related party expenses for the three months ended March 31, 2023.