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Note H - Weighted Average Shares Outstanding (Tables)
6 Months Ended
Oct. 31, 2015
Notes Tables  
Schedule of Weighted Average Number of Shares [Table Text Block]
    Three Months Ended
October 31,
  Six Months Ended
October 31,
    2015   2014   2015   2014
Weighted average shares outstanding-basic     8,471,918       8,604,003       8,492,679       8,660,173  
Dilutive options and restricted stock     -       418,434       360,942       422,577  
Weighted average shares outstanding-diluted     8,471,918       9,022,437       8,853,621       9,082,750  
Antidilutive securities not included:                                
Options     251,000       89,000       254,500       79,500  
Restricted stock     9,500       -       4,750       -