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Note 5 - Inventories (Tables)
 12 Months Ended
Sep. 30, 2016
Notes Tables  
Schedule of Inventory, Current [Table Text Block]
 
 
September 30,
 
 
 
2016
 
 
2015
 
Raw materials
   $ 4,393,928     $ 4,562,535  
Finished goods
     775,628       763,227  
Work in process
     174,485       20,588  
Inventories, gross
     5,344,041       5,346,350  
Reserve for obsolescence
     (580,132 )     (420,178 )
Inventories, net
   $ 4,763,909     $ 4,926,172