Revenue Recognition - Summary of Revenues Disaggregated by Revenue Source (Details) - USD ($) $ in Thousands	3 Months Ended
Mar. 31, 2021	Mar. 31, 2020
Disaggregation Of Revenue [Line Items]
Revenue	$ 82,210	$ 58,900
Subscription Services
Disaggregation Of Revenue [Line Items]
Revenue	70,432	53,811
Professional Services
Disaggregation Of Revenue [Line Items]
Revenue	5,940	4,481
Software Licenses and Other
Disaggregation Of Revenue [Line Items]
Revenue	$ 5,838	$ 608

Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise.

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+ Details