Quarterly report pursuant to Section 13 or 15(d)

REVENUE (Details 1)

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REVENUE (Details 1) - USD ($)
3 Months Ended
Mar. 31, 2019
Dec. 31, 2018
Revenue from Contract with Customer [Abstract]    
Contract Assets $ 1,297,700 $ 1,063,500
Increase (decrease) in contract assets 234,200  
Increase (decrease) in contract liabilities (408,900)  
Increase (decrease) in deferred revenue current (112,600)  
Increase (decrease) in deferred revenue non-current (8,200)  
Deferred revenue 78,900 191,500 [1]
Deferred revenue, current 191,500 78,900
Deferred revenue, non-current 55,000 63,200 [1]
Contract Liabilities $ 470,200 $ 61,300
[1] These numbers were derived from the audited financial statements for the year ended December 31, 2018. See accompanying notes.