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Note 1 - Nature of Operations (Tables)
12 Months Ended
Sep. 30, 2015
Notes Tables  
Schedule of Segment Reporting Information, by Segment [Table Text Block]
 
Product Classes
2015
2014
2013


Automotive Test Equipment
 
77.8
%
76.3
%
74.4
%
Indicating Instruments
22.2
23.7
 
25.6
 
           
       
Total
 
100.0
%
100.0
%
100.0
%