CONSOLIDATED BALANCE SHEETS [Parentheticals] (USD $)	Oct. 31, 2011	Jul. 31, 2011
Statement Of Financial Position [Abstract]
Common stock, no par value (in dollars per share)
Common stock, shares authorized	180,000,000	180,000,000
Common stock, shares issued	65,054,811	66,005,517
Common stock, shares outstanding	65,054,811	66,005,517