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Income Taxes (Details) (USD $)
3 Months Ended 6 Months Ended 18 Months Ended
May 31, 2013
May 31, 2012
May 31, 2013
May 31, 2012
May 31, 2013
Income Taxes [Abstract]          
Effective tax rate     0.00% 0.00%  
Income tax related interest or penalties