Revenue Recognition - Revenue Generated Following Geographic Regions (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Disaggregation of Revenue [Line Items]
Total revenue	$ 3,184	$ 4,238	$ 7,490	$ 8,930
Operating Segments
Disaggregation of Revenue [Line Items]
Total revenue	3,184	4,238	7,490	8,930
Operating Segments | United States
Disaggregation of Revenue [Line Items]
Total revenue	2,064	2,274	4,118	4,310
Operating Segments | Germany
Disaggregation of Revenue [Line Items]
Total revenue	59	635	119	653
Operating Segments | Rest of World
Disaggregation of Revenue [Line Items]
Total revenue	$ 1,061	$ 1,329	$ 3,253	$ 3,967