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Note H - Weighted Average Shares Outstanding (Tables)
9 Months Ended
Jan. 31, 2017
Notes Tables  
Schedule of Weighted Average Number of Shares [Table Text Block]
  Three Months Ended
January 31,
  Nine Months Ended
January 31,
    2017   2016   2017   2016
                                 
Weighted average shares outstanding-basic    
7,893,737
     
8,367,728
     
7,891,908
     
8,451,029
 
Dilutive options and restricted stock    
282,017
     
248,029
     
274,023
     
323,305
 
                                 
Weighted average shares outstanding-diluted    
8,175,754
     
8,615,757
     
8,165,931
     
8,774,334
 
                                 
Antidilutive securities not included:                                
Options    
327,750
     
373,000
     
360,500
     
294,000
 
Restricted stock    
-
     
9,500
     
6,333
     
6,333