Basis of presentation and description of business - Segment and Geographic Information (Details) $ in Thousands	3 Months Ended			9 Months Ended
	Sep. 30, 2021 USD ($)	Sep. 30, 2020 USD ($)		Sep. 30, 2021 USD ($) segment	Sep. 30, 2020 USD ($)
Disaggregation of Revenue [Line Items]
Number of operating segment | segment				1
Number of reportable segment | segment				1
Revenue	$ 95,621	$ 70,548	[1]	$ 262,586	$ 192,865	[1]
The Americas
Disaggregation of Revenue [Line Items]
Revenue	69,865	54,707		195,408	149,723
Europe, the Middle East, India, and Africa
Disaggregation of Revenue [Line Items]
Revenue	19,543	11,786		49,721	32,347
Asia Pacific
Disaggregation of Revenue [Line Items]
Revenue	$ 6,213	$ 4,055		$ 17,457	$ 10,795

[1] Certain prior period amounts have been revised to correct immaterial errors. See Note 1 for more information.