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Segment Reporting and Concentrations (Details 1) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2015
Jun. 30, 2014
Jun. 30, 2015
Jun. 30, 2014
Segment Reporting Information [Line Items]        
Revenues $ 14,063 $ 14,314 $ 27,865 $ 28,380
Other - principally Europe        
Segment Reporting Information [Line Items]        
Revenues 1,294 1,331 2,824 2,525
United States        
Segment Reporting Information [Line Items]        
Revenues 6,615 7,756 13,203 15,745
United Kingdom        
Segment Reporting Information [Line Items]        
Revenues 2,050 2,645 4,251 4,124
The Netherlands        
Segment Reporting Information [Line Items]        
Revenues 2,648 2,231 4,760 5,276
Canada        
Segment Reporting Information [Line Items]        
Revenues $ 1,456 $ 351 $ 2,827 $ 710