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Condensed Consolidated Balance Sheets (Unaudited) (Parentheticals) (USD $)
Jul. 31, 2014
Apr. 30, 2014
Preferred stock, par value (in Dollars per share) $ 0.01 $ 0.01
Preferred stock, shares authorized 1,000,000 1,000,000
Preferred stock, shares issued 0 0
Preferred stock, shares outstanding 0 0
Common stock, par value (in Dollars per share) $ 0.01 $ 0.01
Common stock, shares authorized 50,000,000 50,000,000
Common stock, shares issued 12,471,895 12,452,809
Common stock, shares outstanding 8,680,245 8,735,842
Treasury stock, shares 3,791,650 3,716,967