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Note 15 - Employee and Non-Employee Stock Options (Tables)
 12 Months Ended
Mar. 31, 2016
Notes Tables  
Share-based Compensation, Stock Options, Activity [Table Text Block]
           
Weighted
    
Weighted
          
           
Average
    
Average
    
Aggregate
  
           
Exercise Price
    
Remaining
    
Intrinsic
  
   
Shares
    
Per Share
    
Life(Years)
    
Value
  
                                 
Outstanding at March 31, 2014
    
101,500
     $
8.73
      
3.39
     $
342,000
  
Granted
    
-
      
 
      
 
      
 
  
Exercised
    
(17,500
)
    
8.61
      
 
      
 
  
Forfeited
    
(6,000
)
    
8.29
      
 
      
 
  
Repurchased
    
(32,000
)
    
8.96
      
 
      
 
  
Outstanding at March 31, 2015
    
46,000
     $
8.68
      
2.87
     $
732,000
  
Granted
    
-
      
 
      
 
      
 
  
Exercised
    
-
      
-
      
 
      
 
  
Forfeited
    
(6,000
)
    
8.29
      
 
      
 
  
Repurchased
    
-
      
-
      
 
      
 
  
Outstanding at March 31, 2016
    
40,000
      
8.74
      
2.09
     $
617,000
  
Exercisable at March 31, 2016
    
40,000
     $
8.74
      
2.09
     $
617,000