Annual report pursuant to Section 13 and 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)
12 Months Ended
Dec. 31, 2019
USD ($)
Revenue From Contract With Customer [Abstract]  
Beginning balance – January 1, 2019 $ 1,438,492
Increase (advanced billings) 15,333,034
Decrease (revenue recognition) (15,477,261)
Ending balance – December 31, 2019 $ 1,294,265