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Condensed Consolidated Balance Sheets (Parentheticals) (USD $)
Jan. 31, 2012
Jul. 31, 2011
Statement Of Financial Position [Abstract]    
Preferred stock par value (in dollars per share) $ 0.0001 $ 0.0001
Preferred stock, shares authorized 5,000,000 5,000,000
Preferred stock, shares issued      
Preferred stock, shares outstanding      
Common stock par value (in dollars per share) $ 0.0001 $ 0.0001
Common stock, shares authorized 180,000,000 180,000,000
Common stock, shares issued 63,262,727 66,005,517
Common stock, shares outstanding 63,262,727 66,005,517