Summary of Significant Accounting Policies - Schedule of Segment Reporting Information, by Segment (Details) - USD ($) $ in Thousands	3 Months Ended						9 Months Ended
	Sep. 30, 2025	Jun. 30, 2025	Mar. 31, 2025	Sep. 30, 2024	Jun. 30, 2024	Mar. 31, 2024	Sep. 30, 2025	Sep. 30, 2024
Segment Reporting Information [Line Items]
Revenue	$ 12,500			$ 0			$ 17,500	$ 0
Share-based compensation expense	3,469			2,191			8,869	4,735
Total operating expenses	31,387			12,945			70,175	43,385
Loss from operations	(18,887)			(12,945)			(52,675)	(43,385)
Other income (expense)	(14)			(6)			174	281
Interest income	2,201			2,736			6,770	5,987
Net loss before income taxes	(16,700)			(10,215)			(45,731)	(37,117)
Income tax expense	0			0			500	0
Net loss	(16,700)	$ (14,912)	$ (14,619)	(10,215)	$ (10,254)	$ (16,648)	(46,231)	(37,117)
Reportable Segment
Segment Reporting Information [Line Items]
Revenue	12,500			0			17,500	0
Selling, general and administrative expense	24,389			5,279			44,277	16,249
Research and development expense	3,529			5,475			17,029	22,401
Share-based compensation expense	3,469			2,191			8,869	4,735
Total operating expenses	31,387			12,945			70,175	43,385
Loss from operations	(18,887)			(12,945)			(52,675)	(43,385)
Other income (expense)	(14)			(6)			174	281
Interest income	2,201			2,736			6,770	5,987
Net loss before income taxes	(16,700)			(10,215)			(45,731)	(37,117)
Income tax expense	0			0			500	0
Net loss	$ (16,700)			$ (10,215)			$ (46,231)	$ (37,117)