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Segment Reporting - Schedule of Revenues by Geographic Area (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2020
Mar. 31, 2019
Revenues From External Customers And Long Lived Assets [Line Items]    
Revenues $ 26,174 $ 20,741
United States    
Revenues From External Customers And Long Lived Assets [Line Items]    
Revenues 13,486 9,872
Europe    
Revenues From External Customers And Long Lived Assets [Line Items]    
Revenues 8,281 6,440
Japan    
Revenues From External Customers And Long Lived Assets [Line Items]    
Revenues 1,970 2,664
Rest of World    
Revenues From External Customers And Long Lived Assets [Line Items]    
Revenues $ 2,437 $ 1,765