Equity Incentive Plan - Stock-based compensation expense (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Equity Incentive Plan
Total stock-based compensation expense	$ 9,285	$ 7,738	$ 18,015	$ 28,035
Cost of revenue - subscription
Equity Incentive Plan
Total stock-based compensation expense	33	1	42	3
Research and development
Equity Incentive Plan
Total stock-based compensation expense	3,595	1,562	6,374	2,953
Sales and marketing
Equity Incentive Plan
Total stock-based compensation expense	2,128	2,085	3,899	3,758
General and administrative
Equity Incentive Plan
Total stock-based compensation expense	$ 3,529	$ 4,090	$ 7,700	$ 21,321