Quarterly report pursuant to Section 13 or 15(d)

C. ACCOUNTS RECEIVABLE (Tables)

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C. ACCOUNTS RECEIVABLE (Tables)
9 Months Ended
Sep. 30, 2017
Receivables [Abstract]  
Accounts Receivable
    September 30,
2017
    December 31,
2016
 
Accounts receivable   $ 1,781,394     $ 1,438,345  
Allowance for doubtful accounts     (12,173 )     (34,573 )
Accounts receivable, net   $ 1,769,221     $ 1,403,772