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Segment Reporting and Concentrations (Details 1) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2018
Sep. 30, 2017
Sep. 30, 2018
Sep. 30, 2017
Segment Reporting Information [Line Items]        
Revenues $ 14,049 $ 15,018 $ 42,439 $ 45,271
United States        
Segment Reporting Information [Line Items]        
Revenues 6,481 7,637 18,452 22,630
United Kingdom        
Segment Reporting Information [Line Items]        
Revenues 2,403 2,320 8,387 7,767
The Netherlands        
Segment Reporting Information [Line Items]        
Revenues 1,896 1,704 5,485 5,187
Canada        
Segment Reporting Information [Line Items]        
Revenues 1,459 1,367 4,397 4,212
Other - principally Europe        
Segment Reporting Information [Line Items]        
Revenues $ 1,810 $ 1,990 $ 5,718 $ 5,475