Summary of Significant Accounting Policies - Property and Equipment (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 5,072	$ 609
Accumulated depreciation	(270)	(101)
Property and equipment, net	4,802	508
Depreciation	200	100
Computers and software
Property, Plant and Equipment [Line Items]
Property and equipment, gross	464	338
Furniture and fixtures
Property, Plant and Equipment [Line Items]
Property and equipment, gross	65	65
Construction in process
Property, Plant and Equipment [Line Items]
Property and equipment, gross	4,389	77
Lab equipment
Property, Plant and Equipment [Line Items]
Property and equipment, gross	25	0
Leasehold improvements
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 129	$ 129