Summary of Significant Accounting Policies - Summary of Revenue from External Customers by Geographic Areas (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Disaggregation of Revenue [Line Items]
Total revenue	$ 3,681	$ 3,591
United States
Disaggregation of Revenue [Line Items]
Total revenue	2,023	1,581
Outside the United States
Disaggregation of Revenue [Line Items]
Total revenue	$ 1,658	$ 2,010