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Note 6 - Inventories
12 Months Ended
Sep. 30, 2018
Notes to Financial Statements  
Inventory Disclosure [Text Block]
6
. INVENTORIES
 
Inventories consisted of the following:
 
   
September 30,
 
   
2018
   
2017
 
Raw materials
  $
4,487,273
    $
3,784,935
 
Finished goods
   
1,768,544
     
1,742,960
 
Work in process
   
875,417
     
147,871
 
Inventories, gross
   
7,131,234
     
5,675,766
 
Reserve for obsolescence
   
(397,051
)    
(418,532
)
Inventories, net
  $
6,734,183
    $
5,257,234
 
 
The Company relies on
one
supplier for compression drivers for its LRAD products and is making efforts to obtain alternative suppliers to reduce such reliance. The Company’s ability to manufacture its LRAD products could be adversely affected if it were to lose this sole source supplier and was unable to find an alternative supplier.