Property and equipment , net - Summary of Property and Equipment, Net (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Property, Plant and Equipment [Line Items]
Property and equipment, at cost	$ 1,205	$ 1,287
Less: accumulated depreciation	(800)	(736)
Property and equipment, net	405	551
Leasehold improvements [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, at cost	710	675
Office equipment [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, at cost	199	190
IT Equipment [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, at cost	$ 296	$ 422