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 6 Months Ended
Jun. 30, 2020
Jun. 30, 2019
Jun. 30, 2020
Jun. 30, 2019
Disaggregation Of Revenue [Line Items]        
Total revenue $ 663,972 $ 5,399,186 $ 5,158,289 $ 10,745,938
North America and Caribbean        
Disaggregation Of Revenue [Line Items]        
Total revenue 159,085 3,907,953 3,291,260 7,752,478
Europe, Middle East and Africa        
Disaggregation Of Revenue [Line Items]        
Total revenue $ 504,887 $ 1,491,233 $ 1,867,029 $ 2,993,460