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Note 5 - Inventories (Tables)
 3 Months Ended
Dec. 31, 2016
Notes Tables  
Schedule of Inventory, Current [Table Text Block]
 
 
December 31,
 
 
September 30,
 
 
 
2016
 
 
2016
 
Raw materials
   $
4,129,237
    $
4,393,928
 
Finished goods
    
1,051,735
     
775,628
 
Work in process
    
490,749
     
174,485
 
Inventories, gross
    
5,671,721
     
5,344,041
 
Reserve for obsolescence
    
(580,156
 )    
(580,132
 )
Inventories, net
   $
5,091,565
    $
4,763,909