Revenue - Disaggregation of Revenue (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Disaggregation of Revenue [Line Items]
Total revenues	$ 1,082	$ 329
Recognized at a point in time
Disaggregation of Revenue [Line Items]
Total revenues	555	313
Recognized over time
Disaggregation of Revenue [Line Items]
Total revenues	527	16
United States
Disaggregation of Revenue [Line Items]
Total revenues	1,021	233
Europe
Disaggregation of Revenue [Line Items]
Total revenues	40	0
Asia
Disaggregation of Revenue [Line Items]
Total revenues	$ 21	$ 96