Quarterly report pursuant to Section 13 or 15(d)

Significant Accounting Policies (Details)

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Significant Accounting Policies (Details) (USD $)
1 Months Ended 3 Months Ended
Dec. 31, 2012
Mar. 31, 2013
Feb. 29, 2012
Major components of net realized and unrealized gain on trading securities      
Net unrealized gain on trading securities $ 4,663,211 $ 751,004 $ 0
Net realized gain (loss) on trading securities (6,432,269) (434,941) 2,862,272
Total net realized and unrealized gain (loss) on trading securities $ (1,769,058) $ 316,063 $ 2,862,272