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Revenue Recognition - Revenues Generated Following Geographic Regions (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2021
Jun. 30, 2020
Jun. 30, 2021
Jun. 30, 2020
Disaggregation of Revenue [Line Items]        
Total revenue $ 4,264 $ 1,890 $ 8,682 $ 5,409
Operating Segments        
Disaggregation of Revenue [Line Items]        
Total revenue 4,264 1,890 8,682 5,409
Operating Segments | United States        
Disaggregation of Revenue [Line Items]        
Total revenue 2,445 1,156 4,668 3,167
Operating Segments | United Kingdom        
Disaggregation of Revenue [Line Items]        
Total revenue 774 92 1,453 779
Operating Segments | Brazil        
Disaggregation of Revenue [Line Items]        
Total revenue 261 210 646 491
Operating Segments | Canada        
Disaggregation of Revenue [Line Items]        
Total revenue 140 199 221 337
Operating Segments | Rest of World        
Disaggregation of Revenue [Line Items]        
Total revenue $ 644 $ 233 $ 1,694 $ 635