Summary of Significant Accounting Policies - Revenue by Geography (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Disaggregation of Revenue [Line Items]
Revenue	$ 22,194	$ 14,049	$ 42,636	$ 30,870
United States
Disaggregation of Revenue [Line Items]
Revenue	20,230	13,221	39,000	28,518
International
Disaggregation of Revenue [Line Items]
Revenue	$ 1,964	$ 828	$ 3,636	$ 2,352