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Note 1 - Nature of Operations (Tables)
12 Months Ended
Sep. 30, 2016
Notes Tables  
Schedule of Segment Reporting Information, by Segment [Table Text Block]
Product Classes
 
2016
 
 
2015
 
 
2014
 
Automotive Test Equipment
   
55.5
%    
77.8
%    
76.3
%
Indicating Instruments
   
18.0
     
22.2
     
23.7
 
Flexible Hose
   
26.5
     
-
     
-
 
                         
Total
   
100.0
%    
100.0
%    
100.0
%