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Note 5 - Stockholders' Equity (Tables)
 6 Months Ended
Aug. 31, 2019
Notes Tables  
Share-based Payment Arrangement, Restricted Stock Unit, Activity [Table Text Block]
   
Six Months Ended
  
   
August 31,
  
   
2019
    
2018
  
Outstanding non-vested restricted stock units as of February 28:
    
25,002
      
77,594
  
Granted
    
270,000
      
-
  
Vested
    
(28,502
 )    
(43,224
 )
Cancelled/forfeited
    
-
      
(200
 )
Outstanding non-vested restricted stock units as of August 31:
    
266,500
      
34,170
  
                 
Weighted average grant date fair value
   $
9.40
     $
12.05
  
Weighted average remaining vesting period (in years)
    
5.14
      
0.88