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Note 6 - Stock-based Compensation (Tables)
 3 Months Ended
May 31, 2020
Notes Tables  
Share-based Payment Arrangement, Option, Activity [Table Text Block]
   
Outstanding
Options
    
Weighted
Average
Exercise Price
    
Weighted Average
Remaining Contractual
Term (in years)
    
Aggregate
Intrinsic
Value
  
                                 
Balance, March 1, 2020
  
 
510,634
    
$
12.45
    
 
 
 
  
$
-
  
Granted
    
129,100
      
12.58
      
 
      
 
  
Exercised
    
-
      
-
      
 
      
 
  
Terminated or expired
    
(2,250
 )    
14.46
      
 
      
 
  
Balance, May 31, 2020
  
 
637,484
    
$
12.47
    
 
4.19
    
$
-
  
Vested and exercisable, May 31, 2020
  
 
427,472
    
$
11.88
    
 
5.94
    
$
107