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Note 7 - Inventories
9 Months Ended
Jun. 30, 2018
Notes to Financial Statements  
Inventory Disclosure [Text Block]
7
. INVENTORIES
 
Inventories consisted of the following:
 
   
June 30,
2018
   
September 30,
2017
 
Raw materials
  $
5,119,720
    $
3,784,935
 
Finished goods
   
456,899
     
1,742,960
 
Work in progress
   
338,506
     
147,871
 
Inventories, gross
   
5,915,125
     
5,675,766
 
Reserve for obsolescence
   
(510,507
)    
(418,532
)
Inventories, net
  $
5,404,618
    $
5,257,234