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Segment Information (Details 1) - USD ($)
$ in Thousands
Jun. 30, 2018
Dec. 31, 2017
Revenues from External Customers and Long-Lived Assets [Line Items]    
Long-lived assets $ 2,696 $ 3,327
North America [Member]    
Revenues from External Customers and Long-Lived Assets [Line Items]    
Long-lived assets 3 3
Asia [Member]    
Revenues from External Customers and Long-Lived Assets [Line Items]    
Long-lived assets 4 6
Europe [Member]    
Revenues from External Customers and Long-Lived Assets [Line Items]    
Long-lived assets $ 2,689 $ 3,318