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Accounts Receivable (Tables)
6 Months Ended
Jun. 30, 2019
Receivables [Abstract]  
Schedule of Accounts Receivable

   June 30,
2019
   December 31,
2018
 
Accounts receivable  $3,618,188   $4,459,833 
Allowances for doubtful accounts   (268,530)   (37,088)
   $3,349,658   $4,422,745