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Note J - Weighted Average Shares Outstanding (Tables)
12 Months Ended
Apr. 30, 2014
Weighted Average Shares Outstanding [Abstract]  
Schedule of Weighted Average Number of Shares [Table Text Block]
   
Years Ended April 30,
 
   
2014
   
2013
   
2012
 
                   
Weighted average shares outstanding-basic
    8,930,592       9,111,851       9,793,616  
Dilutive options and restricted stock
    461,075       457,851       362,739  
                         
Weighted average shares outstanding-diluted
    9,391,667       9,569,702       10,156,355  
                         
Antidilutive securities not included:
                       
Options
    77,500       40,000       27,500