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Condensed Schedule of Investments [Parenthetical] (USD $) | 3 Months Ended
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Mar. 31, 2014
Collateral amount on open futures contracts | $ 3,168,711
Cash Equivalents [Member] | U.S. Treasury Bill, 0.07%, 4/24/2014 [Member] |
Interest rate | 0.07%
Expiration date | 4/24/2014
Open Futures Contracts - Long [Member] | ICE Brent Crude Oil Futures CO May 2014 contracts, expiring April 2014 [Member] |
Expiration date | April 2014

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