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Segment and Geographic Information (Tables)
3 Months Ended
Mar. 31, 2019
Segment Reporting [Abstract]  
Schedule of Revenues by Geographic Region

Total revenue by major geographic area is as follows (in thousands):

 

    Three Months Ended
March 31,
 
    2019     2018  
United States   $ 16,039     $ 17,153  
Rest of world     687       781  
Total revenue   $ 16,726     $ 17,934