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Note 8 - Segment and Related Information (Tables)
 6 Months Ended
Mar. 31, 2017
Notes Tables  
Schedule of Segment Reporting Information, by Segment [Table Text Block]
 
  
Three Months Ended
March 31,
    
Six Months Ended
March 31,
  
                                 
 
  
2017
    
2016
    
2017
    
2016
  
                                 
Sales
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Test and Measurement
  $
1,770,071
     $
1,046,624
     $
2,597,137
     $
2,423,496
  
Industrial Hose
    
1,576,244
      
-
      
3,106,104
      
-
  
Total Sales
  $
3,346,315
     $
1,046,624
     $
5,703,241
     $
2,423,496
  
                                 
                                 
Income (Loss) Before Provision for Income Taxes
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Test and Measurement
   $
734,228
     $
79,370
      
688,818
      
468,948
  
Industrial Hose
    
425,970
      
-
      
815,607
      
-
  
Administrative and Other Expenses
    
(938,931
 )    
(543,814
 )    
(1,588,864
 )    
(980,581
 )
                                 
Income (Loss) Before Provision for Income Taxes
   $
221,267
     $
(464,444
 )   $
(84,439
 )   $
(511,633
 )