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)
3 Months Ended
Mar. 31, 2018
USD ($)
Revenue From Contract With Customer [Abstract]  
Beginning balance – January 1, 2018 $ 1,083,639
Increase (advanced billings) 3,260,177
Decrease (revenue recognition) (3,234,263)
Ending balance – March 31. 2018 $ 1,109,553