Summary of Significant Accounting Policies - Segments (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2020 USD ($) segment	Dec. 31, 2019 USD ($)
Accounting Policies [Abstract]
Number of reportable segments | segment	1
Number of operating segments | segment	1
Disaggregation of Revenue [Line Items]
Revenue	$ 73,387	$ 67,301
Revenue		67,301
United States
Disaggregation of Revenue [Line Items]
Revenue	68,118
Revenue		61,843
International
Disaggregation of Revenue [Line Items]
Revenue	$ 5,269
Revenue		$ 5,458