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Segment Reporting and Revenue Disaggregation (Tables)
3 Months Ended
Mar. 31, 2019
Segment Reporting [Abstract]  
Schedule of revenue by geographic region Revenue by geographic region is as follows:
Three Months Ended
March 31,
2019 2018 
United States$14,355 $8,744 
Europe1,895 1,298 
Total revenue$16,250 $10,042