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Note 6 - Inventories
 9 Months Ended
Jun. 30, 2020
Notes to Financial Statements  
Inventory Disclosure [Text Block]
6
.
INVENTORIES
 
Inventories consisted of the following:
 
   
June 30,
    
September 30,
  
   
2020
    
2019
  
Raw materials
   $
6,454,321
     $
5,060,331
  
Finished goods
    
1,115,923
      
998,607
  
Work in process
    
462,767
      
306,809
  
Inventories, gross
    
8,033,011
      
6,365,747
  
Reserve for obsolescence
    
(698,846
 )    
(530,584
 )
Inventories, net
   $
7,334,165
     $
5,835,163