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Accounts Receivable (Tables)
9 Months Ended
Sep. 30, 2016
Accounts Receivable[Abstract]  
Schedule of accounts receivable

 

  

As of

September 30, 2016

  

As of

December 31, 2015

  (Decrease) 
Trade accounts receivable, gross $697,472  $736,195  $(38,723)
Accumulated allowance for bad debt  (20,317)  (18,092)  (2,225)
Trade accounts receivable, net $677,155  $718,103  $(40,948)