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Note 6 - Inventories
3 Months Ended
Dec. 31, 2018
Notes to Financial Statements  
Inventory Disclosure [Text Block]
6
.
INVENTORIES
 
Inventories consisted of the following:
 
   
December 31,
   
September 30,
 
   
2018
   
2018
 
Raw materials
  $
6,674,524
    $
4,487,273
 
Finished goods
   
2,232,627
     
1,768,544
 
Work in process
   
253,486
     
875,417
 
Inventories, gross
   
9,160,637
     
7,131,234
 
Reserve for obsolescence
   
(451,905
)    
(397,051
)
Inventories, net
  $
8,708,732
    $
6,734,183