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Note 13 - Major Customers (Tables)
6 Months Ended
Mar. 31, 2017
Notes Tables  
Schedule of Revenue from External Customers Attributed to Foreign Countries by Geographic Area [Table Text Block]
 
 
Three months ended
 
 
Six months ended
 
 
 
March 31,
 
 
March 31,
 
 
 
2017
 
 
2016
 
 
2017
 
 
2016
 
Americas
  $
2,099,151
    $
2,417,362
    $
3,721,509
    $
3,615,657
 
Europe, Middle East and Africa
   
719,415
     
158,648
     
1,053,792
     
497,322
 
Asia Pacific
   
2,923,825
     
1,025,964
     
3,908,425
     
2,310,527
 
Total Revenues
  $
5,742,391
    $
3,601,974
    $
8,683,726
    $
6,423,506