Revenue Recognition - Revenue by Geographic Region (Details) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022 USD ($)	Jun. 30, 2021 USD ($)	Jun. 30, 2022 USD ($) item	Jun. 30, 2021 USD ($)
Revenue, net:
Revenue	$ 3,714	$ 3,289	$ 6,196	$ 6,135
Percent of total revenue	1.00%	1.00%	1.00%	1.00%
Number of geographical markets | item			2
Outside of the United States
Revenue, net:
Revenue	$ 2,507	$ 2,310	$ 4,222	$ 4,843
Percent of total revenue	0.675%	0.702%	0.681%	0.789%
United States
Revenue, net:
Revenue	$ 1,207	$ 979	$ 1,974	$ 1,292
Percent of total revenue	0.325%	0.298%	0.319%	0.211%