Quarterly report pursuant to Section 13 or 15(d)

4. ACCRUED EXPENSES (Tables)

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4. ACCRUED EXPENSES (Tables)
6 Months Ended
Jun. 30, 2018
Payables and Accruals [Abstract]  
Accrued expenses
    June 30, 2018     December 31, 2017  
             
Accrued payroll expenses   $ 402,278     $ 1,037,122  
Other accrued liabilities     1,106,870       894,798  
    $ 1,509,148     $ 1,931,920