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Note 2 - Summary of Significant Accounting Policies (Tables)
 3 Months Ended
Dec. 31, 2017
Notes Tables  
Property, Plant and Equipment Estimated Useful Lives [Table Text Block]
Class
 
Method
   
Estimated Useful
Lives (years)
  
                 
Buildings & Improvements
  
Straight-line
    
 10
to
40
  
Machinery and equipment
  
Straight-line
    
 3
to
10
  
Tools and dies
  
Straight-line
    
 
3