Income Taxes - Schedule of Components of Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Deferred tax assets
Net operating loss carryforward	$ 118,511	$ 87,321	$ 74,454
Capitalized 174 R&D costs	44,465	45,531	22,532
Intangible assets	4,070	2,117	47
Accrued expense	1,625	1,047	579
Stock-based compensation	12,943	7,114	4,246
Other	87	64	88
Total deferred tax assets	201,528	163,021	125,491
Deferred tax liabilities
Unrealized gain	(183)	(92)	0
Total deferred tax liabilities	(183)	(92)	0
Less: Valuation allowance	(201,345)	(162,929)	(125,491)
Deferred tax assets, net	0	0	0
Federal tax credits
Deferred tax assets
Tax credits	18,196	18,196	21,914
State tax credits
Deferred tax assets
Tax credits	$ 1,631	$ 1,631	$ 1,631