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Accounts Receivable (Tables)
9 Months Ended
Sep. 30, 2018
Accounts Receivable [ Abstract]  
Schedule of accounts receivable
  September 30, 
2018
  December 31,
2017
 
Accounts receivable $13,721,536  $17,208,585 
Less: allowance for doubtful accounts  (8,892,723)  (8,115,876)
  $4,828,813  $9,092,709