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Note H - Weighted Average Shares Outstanding (Tables)
3 Months Ended
Jul. 31, 2017
Notes Tables  
Schedule of Weighted Average Number of Shares [Table Text Block]
    Three Months Ended
July 31,
    2017   2016
         
Weighted average shares outstanding-basic    
7,548,846
     
7,948,925
 
Dilutive options and restricted stock    
219,464
     
236,152
 
                 
Weighted average shares outstanding-diluted    
7,768,310
     
8,185,077
 
                 
Antidilutive securities not included:                
Options    
337,750
     
410,500
 
Restricted stock    
34,000
     
9,000