Segment and Geographic Information - Geographic (Details) - USD ($) $ in Thousands	3 Months Ended
Mar. 31, 2020	Mar. 31, 2019
Segment Reporting Information [Line Items]
Total revenue	$ 20,055	$ 13,069
International
Segment Reporting Information [Line Items]
Total revenue	11,277	10,255
United States
Segment Reporting Information [Line Items]
Total revenue	$ 8,778	$ 2,814

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