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Consolidated Balance Sheets (Parenthetical) - $ / shares
Oct. 31, 2015
Oct. 31, 2014
Statement Of Financial Position [Abstract]    
Preferred shares, par value
Preferred shares, authorized 10,000,000 10,000,000
Preferred shares, issued 0 0
Common shares, par value
Common shares, authorized 160,000,000 160,000,000
Common shares, issued 98,023,000 98,023,000