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Note 6 - Stock-based Compensation (Tables)
3 Months Ended
May. 31, 2015
Notes Tables  
Schedule of Share-based Compensation, Stock Options, Activity [Table Text Block]
 
 
Outstanding Options
 
 
Weighted Average Exercise Price
 
Balance, March 1, 2015
 
 
966,692
 
 
$
22.55
 
Granted
    171,100       21.71  
Exercised
    (2,500 )     19.91  
Terminated or expired
    (750 )     23.28  
Balance, May 31, 2015
 
 
1,134,542
 
 
$
22.43
 
Vested and exercisable, May 31, 2015
 
 
692,283
 
 
$
22.22