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SEGMENT INFORMATION (Details)
12 Months Ended
Dec. 31, 2020
USD ($)
segment
Dec. 31, 2019
USD ($)
Dec. 31, 2018
USD ($)
Segment information by geographical area      
Number of business segments | segment 1    
Revenue $ 1,957,362 $ 2,092,032 $ 1,749,133
Europe      
Segment information by geographical area      
Revenue 1,810,362 1,863,032 1,600,633
Rest of the world      
Segment information by geographical area      
Revenue $ 147,000 $ 229,000 $ 148,500
Major customer one      
Segment information by geographical area      
Percentage of entity's revenue 13.00% 12.00% 28.00%
Major customer two      
Segment information by geographical area      
Percentage of entity's revenue 13.00% 9.00% 9.00%
Major customer three      
Segment information by geographical area      
Percentage of entity's revenue 9.00% 8.00% 9.00%