Quarterly report pursuant to Section 13 or 15(d)

Concentrations (Details Textual)

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Concentrations (Details Textual)
3 Months Ended 9 Months Ended
Aug. 31, 2012
Aug. 31, 2012
Concentrations (Textual) [Abstract]    
Percentage of investments in securities of energy infrastructure companies In relation to aggregate assets   69.00%
Revenue related to the DOD contract 69.00% 82.00%
Percentage of amounts due from the department of defense in relation to consolidated accounts receivable 76.00% 76.00%
Percentage of payment to supplier of natural gas in relation to cost of sales 5.00% 30.00%
Term of contract   10 years