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Note 5 - Inventories
3 Months Ended
Dec. 31, 2017
Notes to Financial Statements  
Inventory Disclosure [Text Block]
5
. INVENTORIES
 
Inventories consisted of the following:
 
   
December 31,
   
September 30,
 
   
2017
   
2017
 
Raw materials
  $
4,619,587
    $
3,784,935
 
Finished goods
   
900,645
     
1,742,960
 
Work in process
   
198,535
     
147,871
 
Inventories, gross
   
5,718,767
     
5,675,766
 
Reserve for obsolescence
   
(458,833
)    
(418,532
)
Inventories, net
  $
5,259,934
    $
5,257,234