Quarterly report pursuant to Section 13 or 15(d)

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

v3.19.2
REVENUE RECOGNITION - Summary of Changes in Revenue Contract Liability (Details)
6 Months Ended
Jun. 30, 2019
USD ($)
Revenue From Contract With Customer [Abstract]  
Beginning balance – January 1, 2019 $ 1,438,492
Increase (advanced billings) 7,725,356
Decrease (revenue recognition) (7,841,078)
Ending balance – June 30, 2019 $ 1,322,770