Revenue - Disaggregation of Revenue (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Disaggregation of Revenue [Line Items]
Revenue	$ 114,162	$ 73,941	$ 305,133	$ 203,092
Geographic Concentration Risk | Revenue
Disaggregation of Revenue [Line Items]
Percentage of Revenue	100.00%	100.00%	100.00%	100.00%
Sales Channel Concentration Risk | Revenue
Disaggregation of Revenue [Line Items]
Percentage of Revenue	100.00%	100.00%	100.00%	100.00%
Channel partners
Disaggregation of Revenue [Line Items]
Revenue	$ 12,159	$ 6,554	$ 31,471	$ 18,413
Channel partners | Sales Channel Concentration Risk | Revenue
Disaggregation of Revenue [Line Items]
Percentage of Revenue	11.00%	9.00%	10.00%	9.00%
Direct customers
Disaggregation of Revenue [Line Items]
Revenue	$ 102,003	$ 67,387	$ 273,662	$ 184,679
Direct customers | Sales Channel Concentration Risk | Revenue
Disaggregation of Revenue [Line Items]
Percentage of Revenue	89.00%	91.00%	90.00%	91.00%
United States
Disaggregation of Revenue [Line Items]
Revenue	$ 59,277	$ 37,605	$ 151,970	$ 101,571
United States | Geographic Concentration Risk | Revenue
Disaggregation of Revenue [Line Items]
Percentage of Revenue	52.00%	51.00%	50.00%	50.00%
Europe, Middle East, and Africa
Disaggregation of Revenue [Line Items]
Revenue	$ 27,943	$ 17,652	$ 76,961	$ 48,275
Europe, Middle East, and Africa | Geographic Concentration Risk | Revenue
Disaggregation of Revenue [Line Items]
Percentage of Revenue	25.00%	24.00%	25.00%	24.00%
Asia Pacific
Disaggregation of Revenue [Line Items]
Revenue	$ 19,634	$ 13,993	$ 55,827	$ 39,782
Asia Pacific | Geographic Concentration Risk | Revenue
Disaggregation of Revenue [Line Items]
Percentage of Revenue	17.00%	19.00%	18.00%	20.00%
Other
Disaggregation of Revenue [Line Items]
Revenue	$ 7,308	$ 4,691	$ 20,375	$ 13,464
Other | Geographic Concentration Risk | Revenue
Disaggregation of Revenue [Line Items]
Percentage of Revenue	6.00%	6.00%	7.00%	6.00%