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Note 17 - Major Customers (Tables)
9 Months Ended
Jun. 30, 2018
Notes Tables  
Schedule of Revenue from External Customers Attributed to Foreign Countries by Geographic Area [Table Text Block]
   
Three months ended
   
Nine months ended
 
   
June 30,
   
June 30,
 
   
2018
   
2017
   
2018
   
2017
 
Americas
  $
3,814,782
    $
1,367,044
    $
14,918,891
    $
5,088,553
 
Asia Pacific
   
3,089,770
     
150,474
     
6,367,532
     
1,204,267
 
Europe, Middle East, and Africa
   
609,516
     
2,612,036
     
1,724,659
     
6,520,460
 
Total Revenues
  $
7,514,068
    $
4,129,554
    $
23,011,082
    $
12,813,280