Quarterly report pursuant to Section 13 or 15(d)

SUMMARY OF SIGNIFICANT ACCOUNTING PRINCIPLES - Concentration of customer revenues and accounts receivable balance (Details)

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SUMMARY OF SIGNIFICANT ACCOUNTING PRINCIPLES - Concentration of customer revenues and accounts receivable balance (Details) - USD ($)
3 Months Ended
Mar. 31, 2018
Mar. 31, 2017
Customer A, related    
Revenue concentration 51.30%
Accounts receivable balance $ 97,804  
Customer B    
Revenue concentration 24.40%
Accounts receivable balance  
Customer C    
Revenue concentration 90.00%
Accounts receivable balance