Segment Information - Long-Lived Assets by Geographical Area (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Revenues from External Customers and Long-Lived Assets [Line Items]
Long-lived assets	$ 4,814	$ 1,474
United States
Revenues from External Customers and Long-Lived Assets [Line Items]
Long-lived assets	4,767	1,437
Europe, Middle-East and Africa (“EMEA”)
Revenues from External Customers and Long-Lived Assets [Line Items]
Long-lived assets	42	29
Asia Pacific
Revenues from External Customers and Long-Lived Assets [Line Items]
Long-lived assets	$ 5	$ 8