Basis of presentation and description of business - Segment and Geographic Information (Details) $ in Thousands	3 Months Ended				6 Months Ended				12 Months Ended
	Jun. 30, 2021 USD ($)	Mar. 31, 2021 USD ($)	Jun. 30, 2020 USD ($)		Jun. 30, 2021 USD ($) segment		Jun. 30, 2020 USD ($)		Dec. 31, 2020 USD ($)	Dec. 31, 2019 USD ($)	Dec. 31, 2018 USD ($)
Disaggregation of Revenue [Line Items]
Number of operating segment | segment					1
Number of reportable segment | segment					1
Revenue	$ 86,238	$ 80,727	$ 62,264	[1]	$ 166,965	[2]	$ 122,317	[1]	$ 269,132	$ 203,965	$ 147,384
The Americas
Disaggregation of Revenue [Line Items]
Revenue	64,726		48,145		125,543		95,016
Europe, the Middle East, India, and Africa
Disaggregation of Revenue [Line Items]
Revenue	15,655		10,631		30,178		20,561
Asia Pacific
Disaggregation of Revenue [Line Items]
Revenue	$ 5,857		$ 3,488		$ 11,244		$ 6,740

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

[2] Includes the three months ended March 31, 2021, which has been revised to correct immaterial errors. See Note 1 for more information.