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Note 18 - Major Customers, Suppliers and Related Information (Tables)
12 Months Ended
Sep. 30, 2018
Notes Tables  
Schedule of Revenue from External Customers Attributed to Foreign Countries by Geographic Area [Table Text Block]
   
Years ended September 30,
 
   
2018
   
2017
 
Americas
  $
16,488,624
    $
8,688,005
 
Europe, Middle East, and Africa
   
3,238,533
     
1,439,157
 
Asia Pacific
   
6,579,633
     
10,187,016
 
    $
26,306,790
    $
20,314,178