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Note 11 - Net Income Per Share (Tables)
12 Months Ended
Mar. 31, 2016
Notes Tables  
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]
 
 
Year Ended March 31,
 
 
 
201
6
 
 
201
5
 
 
201
4
 
Net income available for shareholders
  $ 11,169     $ 9,583     $ 9,000  
                         
Weighted average outstanding shares of common stock
    3,605       3,521       3,445  
Dilutive effect of stock options
    152       129       166  
Common stock and equivalents
    3,757       3,650       3,611  
Net Income per share:
                       
Basic
  $ 3.10     $ 2.72     $ 2.61  
Diluted
    2.97       2.63       2.49