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Note 4 - Earnings Per Share (Tables)
 12 Months Ended
Mar. 31, 2017
Notes Tables  
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]
 
 
Year Ended March 31
 
 
 
2017
 
  
2016
  
Basic
 
 
 
 
 
 
 
 
Net earnings (loss)
 
$
(2,678,684
)
   $
294,000
  
Weighted average common shares
 
 
6,851,944
 
    
6,799,444
  
Dilutive
 
 
 
 
 
 
 
 
Net earnings (loss)
 
$
(2,678,684
)
   $
294,000
  
Weighted average common shares and common share equivalents
 
 
6,851,944
 
    
6,799,444