Revenue - Geographical (Details) - USD ($) $ in Thousands	3 Months Ended
Mar. 31, 2022	Mar. 31, 2021
Disaggregation of Revenue [Line Items]
Revenue	$ 52,374	$ 56,379
United States
Disaggregation of Revenue [Line Items]
Revenue	34,569	36,550
France
Disaggregation of Revenue [Line Items]
Revenue	3,229	5,374
Germany
Disaggregation of Revenue [Line Items]
Revenue	308	333
Rest of world
Disaggregation of Revenue [Line Items]
Revenue	$ 14,268	$ 14,122

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.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
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+ Details