Quarterly report pursuant to Section 13 or 15(d)

REVENUE RECOGNITION - Summary of Changes in Revenue Contract Liability (Details)

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REVENUE RECOGNITION - Summary of Changes in Revenue Contract Liability (Details)
9 Months Ended
Sep. 30, 2019
USD ($)
Revenue From Contract With Customer [Abstract]  
Beginning balance – January 1, 2019 $ 1,438,492
Increase (advanced billings) 11,547,925
Decrease (revenue recognition) (11,691,737)
Ending balance – September 30, 2019 $ 1,294,680