Revenue Recognition - Summary of Revenues Disaggregated by Geography (Details) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Disaggregation Of Revenue [Line Items]
Revenue	$ 271,141	$ 200,882	$ 147,094
United States
Disaggregation Of Revenue [Line Items]
Revenue	201,458	157,039	119,589
International
Disaggregation Of Revenue [Line Items]
Revenue	$ 69,683	$ 43,843	$ 27,505

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