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Note 4 - Inventory (Tables)
9 Months Ended
Jun. 30, 2017
Notes Tables  
Schedule of Inventory, Current [Table Text Block]
 
 
June 30
,
2017
 
 
September 30, 2016
 
                 
Raw materials and component parts
  $
2,760,341
    $
1,730,563
 
Work-in-process
   
592,670
     
438,447
 
Finished products
   
543,854
     
1,139,789
 
                 
Inventories, net of reserve
  $
3,896,865
    $
3,308,799