Income Taxes - Components of Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Deferred tax assets
Net operating loss carryforward	$ 87,321	$ 74,454	$ 68,917
Capitalized 174 R&D costs	45,531	22,532	11,097
Intangible assets	2,117	47	52
Deferred revenue	0	0	566
Accrued expense	1,047	579	668
Stock-based compensation	7,114	4,246	3,293
Other	64	88	190
Total deferred tax assets	163,021	125,491	108,328
Deferred tax liabilities
Unrealized gain	(92)	0	0
Depreciable assets	0	0	(676)
Total deferred tax liabilities	(92)	0	(676)
Less: Valuation allowance	(162,929)	(125,491)	(107,652)
Deferred tax assets, net	0	0	0
Federal tax credits
Deferred tax assets
Tax credits	18,196	21,914	21,914
State tax credits
Deferred tax assets
Tax credits	$ 1,631	$ 1,631	$ 1,631