Segment Reporting and Significant Customer Information - Long Lived Assets by Geographic Area (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Revenues from External Customers and Long-Lived Assets
Long-lived assets	$ 621	$ 657
United States
Revenues from External Customers and Long-Lived Assets
Long-lived assets	122	274
China (Hong Kong)
Revenues from External Customers and Long-Lived Assets
Long-lived assets	336	196
Rest of the world
Revenues from External Customers and Long-Lived Assets
Long-lived assets	$ 163	$ 187