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Segment Reporting and Concentrations (Details 1) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2017
Mar. 31, 2016
Segment Reporting Information [Line Items]    
Revenues $ 14,953 $ 15,698
Other - principally Europe    
Segment Reporting Information [Line Items]    
Revenues 1,678 2,478
United States [Member]    
Segment Reporting Information [Line Items]    
Revenues 6,621 8,273
United Kingdom    
Segment Reporting Information [Line Items]    
Revenues 3,285 1,981
The Netherlands    
Segment Reporting Information [Line Items]    
Revenues 1,894 2,562
Canada    
Segment Reporting Information [Line Items]    
Revenues $ 1,475 $ 404