Revenue Recognition - Summary of Revenues Disaggregated by Revenue Source (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	$ 86,649	$ 65,377	$ 168,859	$ 124,277
Subscription Services
Disaggregation Of Revenue [Line Items]
Revenue	79,652	59,506	150,084	113,317
Professional Services
Disaggregation Of Revenue [Line Items]
Revenue	6,459	4,653	12,399	9,134
Software Licenses and Other
Disaggregation Of Revenue [Line Items]
Revenue	$ 538	$ 1,218	$ 6,376	$ 1,826