Income Taxes - Schedule of Significant Components of Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2025	Dec. 31, 2024
Deferred tax assets:
Net operating loss carryforwards	$ 24,990	$ 7,360
Capitalization of R&D expenses	24,869	5,115
Other	0	3
R&D funding arrangement	9,037	7,291
Accrued expenses and reserves	1,561	1,472
Research credits	1,851	2,226
Total deferred tax assets	62,308	23,467
Less valuation allowance	(62,308)	(23,467)
Net deferred tax assets	$ 0	$ 0