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Segment Reporting and Concentrations (Details 1) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Segment Reporting Information [Line Items]    
Revenues $ 57,418 $ 60,929
United States    
Segment Reporting Information [Line Items]    
Revenues 25,403 30,135
United Kingdom    
Segment Reporting Information [Line Items]    
Revenues 10,874 10,514
The Netherlands    
Segment Reporting Information [Line Items]    
Revenues 7,488 6,871
Canada    
Segment Reporting Information [Line Items]    
Revenues 5,985 5,636
Other - principally Europe    
Segment Reporting Information [Line Items]    
Revenues $ 7,668 $ 7,773