Quarterly report pursuant to Section 13 or 15(d)

REVENUE RECOGNITION - Summary of Disaggregation of Revenue by Geographic Location (Details)

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REVENUE RECOGNITION - Summary of Disaggregation of Revenue by Geographic Location (Details) - USD ($)
3 Months Ended
Mar. 31, 2018
Mar. 31, 2017
Disaggregation Of Revenue [Line Items]    
Total revenue $ 4,360,695 $ 3,475,296
North America and Caribbean    
Disaggregation Of Revenue [Line Items]    
Total revenue 3,502,810 2,800,905
Europe    
Disaggregation Of Revenue [Line Items]    
Total revenue $ 857,885 $ 674,391