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SEGMENT INFORMATION (Details)
12 Months Ended
Dec. 31, 2021
USD ($)
segment
Dec. 31, 2020
USD ($)
Dec. 31, 2019
USD ($)
Segment information by geographical area      
Number of business segments | segment 1    
Revenue $ 2,547,406 $ 1,957,362 $ 2,092,032
Europe      
Segment information by geographical area      
Revenue 2,310,747 1,810,362 1,863,032
Rest of the world      
Segment information by geographical area      
Revenue $ 236,659 $ 147,000 $ 229,000
Major customer one      
Segment information by geographical area      
Percentage of entity's revenue 15.00% 13.00% 12.00%
Major customer two      
Segment information by geographical area      
Percentage of entity's revenue 11.00% 13.00% 9.00%
Major customer three      
Segment information by geographical area      
Percentage of entity's revenue 5.00% 9.00% 8.00%