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DISAGGREGATION OF REVENUE (Details) - USD ($)
3 Months Ended 9 Months Ended
Sep. 30, 2019
Sep. 30, 2018
Sep. 30, 2019
Sep. 30, 2018
Revenue $ 9,685,850 $ 8,508,367 $ 27,883,147 $ 29,330,684
Greece [Member]        
Revenue 6,482,920 641,582 17,688,527 1,733,077
Georgia [Member]        
Revenue 5,320 5,320
Turkey [Member]        
Revenue (128) 24,434
Iraq [Member]        
Revenue 2,134 2,134
Croatia [Member]        
Revenue 5,338
Belgium [Member]        
Revenue 3,146 4,276
Denmark [Member]        
Revenue 22,766 68,562 89,580 255,426
France [Member]        
Revenue 52,774 76,741 142,919 255,123
Germany [Member]        
Revenue 2,063,385 3,751,508 5,350,465 11,706,961
Hungary [Member]        
Revenue 94,004 437,553 261,092 1,194,471
Indonesia [Member]        
Revenue (38) (87) 7,197 6,519
Ireland [Member]        
Revenue 162,552 403,353 376,380 1,331,770
Italy [Member]        
Revenue 45,013 73,240 157,398 338,073
Jordan [Member]        
Revenue (106) 101,141 20,216 134,274
Netherlands [Member]        
Revenue 212,903 757,958 763,889 3,406,124
Poland [Member]        
Revenue 41,837 157,898 270,306 724,695
UK [Member]        
Revenue $ 500,514 $ 2,035,772 $ 2,717,952 $ 8,239,895