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Condensed Schedule of Investments [Parenthetical] | 9 Months Ended
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Sep. 30, 2016 USD ($)
Collateral amount on open futures contracts | $ 9,995,363
Cash Equivalents [Member] | United States [Member] | U.S. Treasury Bills,0.34%, 10/06/2016 | Us Treasury Securities [Member] |
Interest rate | 0.34%
Expiration date | October 06, 2016
Cash Equivalents [Member] | United States [Member] | U.S. Treasury Bills,0.35%, 10/13/2016 | Us Treasury Securities [Member] |
Interest rate | 0.35%
Expiration date | October 13, 2016
Cash Equivalents [Member] | United States [Member] | U.S. Treasury Bills,0.34%, 10/20/2016 | Us Treasury Securities [Member] |
Interest rate | 0.34%
Expiration date | October 20, 2016
Cash Equivalents [Member] | United States [Member] | U.S. Treasury Bills,0.39%, 10/27/2016 | Us Treasury Securities [Member] |
Interest rate | 0.39%
Expiration date | October 27, 2016
Cash Equivalents [Member] | United States [Member] | U.S. Treasury Bills,0.37%, 11/03/2016 | Us Treasury Securities [Member] |
Interest rate | 0.37%
Expiration date | November 03, 2016
Cash Equivalents [Member] | United States [Member] | U.S. Treasury Bills,0.36%, 11/10/2016 | Us Treasury Securities [Member] |
Interest rate | 0.36%
Expiration date | November 10, 2016
Cash Equivalents [Member] | United States [Member] | U.S. Treasury Bills,0.39%, 11/17/2016 | Us Treasury Securities [Member] |
Interest rate | 0.39%
Expiration date | November 17, 2016
Cash Equivalents [Member] | United States [Member] | U.S. Treasury Bills,0.46%, 11/25/2016 | Us Treasury Securities [Member] |
Interest rate | 0.46%
Expiration date | November 25, 2016
Cash Equivalents [Member] | United States [Member] | U.S. Treasury Bills,0.47%, 12/01/2016 | Us Treasury Securities [Member] |
Interest rate | 0.47%
Expiration date | December 01, 2016
Cash Equivalents [Member] | United States [Member] | U.S. Treasury Bills,0.41%, 12/08/2016 | Us Treasury Securities [Member] |
Interest rate | 0.41%
Expiration date | December 08, 2016
Cash Equivalents [Member] | United States [Member] | U.S. Treasury Bills,0.34%, 12/15/2016 | Us Treasury Securities [Member] |
Interest rate | 0.34%
Expiration date | December 15, 2016
Cash Equivalents [Member] | United States [Member] | U.S. Treasury Bills,0.39%, 12/22/2016 | Us Treasury Securities [Member] |
Interest rate | 0.39%
Expiration date | December 22, 2016
Cash Equivalents [Member] | United States [Member] | U.S. Treasury Bills,0.34%, 12/29/2016 | Us Treasury Securities [Member] |
Interest rate | 0.34%
Expiration date | December 29, 2016
Cash Equivalents [Member] | United States [Member] | U.S. Treasury Bills,0.34%, 1/05/2017 | Us Treasury Securities [Member] |
Interest rate | 0.34%
Expiration date | January 05, 2017
Cash Equivalents [Member] | United States [Member] | U.S. Treasury Bills,0.43%, 1/19/2017 | Us Treasury Securities [Member] |
Interest rate | 0.43%
Expiration date | January 19, 2017
Cash Equivalents [Member] | United States [Member] | U.S. Treasury Bills,0.40%, 2/02/2017 | Us Treasury Securities [Member] |
Interest rate | 0.40%
Expiration date | February 02, 2017
Cash Equivalents [Member] | United States [Member] | U.S. Treasury Bills,0.42%, 2/09/2017 | Us Treasury Securities [Member] |
Interest rate | 0.42%
Expiration date | February 09, 2017
Cash Equivalents [Member] | United States [Member] | U.S. Treasury Bills,0.45%, 2/16/2017 | Us Treasury Securities [Member] |
Interest rate | 0.45%
Expiration date | February 16, 2017
Cash Equivalents [Member] | United States [Member] | U.S. Treasury Bills,0.45%, 2/23/2017 | Us Treasury Securities [Member] |
Interest rate | 0.45%
Expiration date | February 23, 2017
Cash Equivalents [Member] | United States [Member] | U.S. Treasury Bills,0.45%, 3/02/2017 | Us Treasury Securities [Member] |
Interest rate | 0.45%
Expiration date | March 02, 2017
Cash Equivalents [Member] | United States [Member] | U.S. Treasury Bills,0.47%, 3/09/2017 | Us Treasury Securities [Member] |
Interest rate | 0.47%
Expiration date | March 09, 2017
Cash Equivalents [Member] | United States [Member] | U.S. Treasury Bills,0.50%, 3/16/2017 | Us Treasury Securities [Member] |
Interest rate | 0.50%
Expiration date | March 16, 2017
Cash Equivalents [Member] | United States [Member] | U.S. Treasury Bills,0.45%, 3/23/2017 | Us Treasury Securities [Member] |
Interest rate | 0.45%
Expiration date | March 23, 2017
Cash Equivalents [Member] | United States [Member] | U.S. Treasury Bills,0.43%, 3/30/2017 | Us Treasury Securities [Member] |
Interest rate | 0.43%
Expiration date | March 30, 2017
Open Futures Contracts - Long [Member] | United States [Member] | Ice Brent Crude Oil Futures Co December 2016 Contracts Expiring October 2016 [Member] |
Expiration date | October 2016

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