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Condensed Consolidated Balance Sheets (Unaudited) (Parentheticals) (USD $)
Jul. 31, 2012
Apr. 30, 2012
Preferred stock, par value (in Dollars per share) $ 0.01 $ 0.01
Preferred stock, shares authorized (in Shares) 1,000,000 1,000,000
Common stock, par value $.01 (in Dollars per share) $ 0.01 $ 0.01
Common stock, shares authorized (in Shares) 50,000,000 50,000,000
Common stock, shares issued (in Shares) 12,373,264 12,371,167
Common stock, shares outstanding (in Shares) 9,164,597 9,378,346
Treasury stock, shares (in Shares) 3,208,667 2,992,821