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Segment Reporting and Geographic Information - Schedule of Revenue from External Customers by Geographical Areas (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Revenues $ 4,350 $ 8,659
United States [Member]    
Revenues 4,327 3,550
Israel [Member]    
Revenues 3,061
Asia [Member]    
Revenues 2,013
Other [Member]    
Revenues $ 23 $ 35