XML 27 R51.htm IDEA: XBRL DOCUMENT v3.20.1
Segment Reporting and Concentrations - Revenues by geographic region (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2020
Mar. 31, 2019
Segment Reporting Information [Line Items]    
Revenues $ 14,530 $ 13,694
Other - principally Europe    
Segment Reporting Information [Line Items]    
Revenues 1,884 1,639
United States    
Segment Reporting Information [Line Items]    
Revenues 6,690 6,531
United Kingdom    
Segment Reporting Information [Line Items]    
Revenues 2,771 2,318
The Netherlands    
Segment Reporting Information [Line Items]    
Revenues 1,640 1,722
Canada    
Segment Reporting Information [Line Items]    
Revenues $ 1,545 $ 1,484