Segment Reporting and Revenue Disaggregation (Details) $ in Thousands	3 Months Ended
Mar. 31, 2021 USD ($) segment	Mar. 31, 2020 USD ($)
Segment Reporting [Abstract]
Number of reporting segments \| segment	1
Segment Reporting and Significant Customers
Revenue	$ 40,352	$ 21,347
United States
Segment Reporting and Significant Customers
Revenue	37,769	19,274
Europe
Segment Reporting and Significant Customers
Revenue	$ 2,583	$ 2,073

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