Quarterly report pursuant to Section 13 or 15(d)

D. ACCOUNTS RECEIVABLE (Tables)

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D. ACCOUNTS RECEIVABLE (Tables)
9 Months Ended
Sep. 30, 2016
Receivables [Abstract]  
Accounts Receivable
    September 30,
2016
    December 31,
2015
 
Accounts receivable   $ 2,156,950     $ 2,286,690  
Allowance for doubtful accounts     (29,517 )     (23,343 )
Accounts receivable, net   $ 2,127,433     $ 2,263,347