Income Taxes - Components of Deferred Tax Assets (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Deferred tax assets
Net operating loss carryforwards	$ 20,778	$ 13,709
Capital research expenditures	14,014	5,337
Tax credit carryforwards	4,406	1,836
Stock-based compensation	2,568	887
Other	52	2
Gross deferred tax assets	41,818	21,771
Valuation allowance	$ (41,818)	$ (21,771)