Balance Sheet Components - Components of Property, Plant, and Equipment (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Property, Plant and Equipment [Line Items]
Property and equipment, at cost	$ 1,501	$ 1,501
Less: Accumulated depreciation	(549)	(462)
Property and equipment, net	952	1,039
Computer equipment
Property, Plant and Equipment [Line Items]
Property and equipment, at cost	734	734
Office furniture
Property, Plant and Equipment [Line Items]
Property and equipment, at cost	724	724
Other
Property, Plant and Equipment [Line Items]
Property and equipment, at cost	$ 43	$ 43