Annual report pursuant to Section 13 and 15(d)

Significant Accounting Policies (Details)

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Significant Accounting Policies (Details) (USD $)
12 Months Ended
Nov. 30, 2012
Nov. 30, 2011
Nov. 30, 2010
Major components of net realized and unrealized gain on trading securities      
Net unrealized gain on trading securities $ 3,985,269 $ 238,617 $ 3,119,424
Net realized gain on trading securities 24,664 2,061,358 (4,013,955)
Total net realized and unrealized gain (loss) on trading securities $ 4,009,933 $ 2,299,975 $ (894,531)