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Net Income Per Common Share (Details Textual)
3 Months Ended 6 Months Ended
May 31, 2013
May 31, 2012
May 31, 2013
May 31, 2012
Net Income Per Common Share (Textual)        
Shares issuable upon exercise of options, warrants or convertible debt excluded from computation of earning per share 680,472,000 10,165,000 22,103,000 10,165,000