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Accounts receivable (Tables)
12 Months Ended
Sep. 30, 2018
Accounts Receivable, Net [Abstract]  
Schedule of accounts receivable
  September 30,
2018
  September 30,
2017
 
       
Accounts receivable - trade $8,601,269  $5,050,951 
Accounts receivable - related party  1,257   93,506 
Accounts receivable, net $8,602,526  $5,144,457