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v3.6.0.2

Schedule of Investments (Parenthetical) - USD ($) | 12 Months Ended
--- | ---
Dec. 31, 2016 | Dec. 31, 2015
Debt Instrument, Collateral Amount | $ 699,804 | $ 4,322,372
Cash Equivalents [Member] | Us Treasury Securities [Member] | U.S. Treasury Bills: 0.19%, 2/04/2016 [Member] |  |
Expiration date |  | 2/04/2016
Interest Rate |  | 0.19%
Cash Equivalents [Member] | Us Treasury Securities [Member] | U.S. Treasury Bills: 0.22%, 2/11/2016 [Member] |  |
Expiration date |  | 2/11/2016
Interest Rate |  | 0.22%
Cash Equivalents [Member] | Us Treasury Securities [Member] | U.S. Treasury Bills: 0.43%, 6/02/2016 [Member] |  |
Expiration date |  | 6/02/2016
Interest Rate |  | 0.43%
Cash Equivalents [Member] | Us Treasury Securities [Member] | U.S. Treasury Bills: 0.52%, 6/09/2016 [Member] |  |
Expiration date |  | 6/09/2016
Interest Rate |  | 0.52%
Cash Equivalents [Member] | Us Treasury Securities [Member] | U.S. Treasury Bills: 0.47%, 6/30/2016 [Member] |  |
Expiration date |  | 6/30/2016
Interest Rate |  | 0.47%
Cash Equivalents [Member] | United State [Member] | U.S. Treasury Bills: 0.34%, 1/05/2017 [Member] |  |
Expiration date | 1/05/2017 |
Interest Rate | 0.34% |
Cash Equivalents [Member] | United State [Member] | U.S. Treasury Bills: 0.43%, 1/19/2017 [Member] |  |
Expiration date | 1/19/2017 |
Interest Rate | 0.43% |
Cash Equivalents [Member] | United State [Member] | U.S. Treasury Bills: 0.36%, 1/26/2017 [Member] |  |
Expiration date | 1/26/2017 |
Interest Rate | 0.36% |
Cash Equivalents [Member] | United State [Member] | U.S. Treasury Bills 0.40%, 2/02/2017 [Member] |  |
Expiration date | 2/02/2017 |
Interest Rate | 0.40% |
Cash Equivalents [Member] | United State [Member] | U.S. Treasury Bills: 0.42%, 2/09/2017 [Member] |  |
Expiration date | 2/09/2017 |
Interest Rate | 0.42% |
Cash Equivalents [Member] | United State [Member] | U.S. Treasury Bills: 0.45%, 2/16/2017 [Member] |  |
Expiration date | 2/16/2017 |
Interest Rate | 0.45% |
Cash Equivalents [Member] | United State [Member] | U.S. Treasury Bills: 0.45%, 2/23/2017 [Member] |  |
Expiration date | 2/23/2017 |
Interest Rate | 0.45% |
Cash Equivalents [Member] | United State [Member] | U.S. Treasury Bills: 0.45%, 3/02/2017 [Member] |  |
Expiration date | 3/02/2017 |
Interest Rate | 0.45% |
Cash Equivalents [Member] | United State [Member] | U.S. Treasury Bills: 0.47%, 3/09/2017 [Member] |  |
Expiration date | 3/09/2017 |
Interest Rate | 0.47% |
Cash Equivalents [Member] | United State [Member] | U.S. Treasury Bills: 0.50%, 3/16/2017 [Member] |  |
Expiration date | 3/16/2017 |
Interest Rate | 0.50% |
Cash Equivalents [Member] | United State [Member] | U.S. Treasury Bills: 0.45%, 3/23/2017 [Member] |  |
Expiration date | 3/23/2017 |
Interest Rate | 0.45% |
Cash Equivalents [Member] | United State [Member] | U.S. Treasury Bills: 0.43%, 3/30/2017 [Member] |  |
Expiration date | 3/30/2017 |
Interest Rate | 0.43% |
Cash Equivalents [Member] | United State [Member] | U.S. Treasury Bills: 0.46%, 4/06/2017 [Member] |  |
Expiration date | 4/06/2017 |
Interest Rate | 0.46% |
Cash Equivalents [Member] | United State [Member] | U.S. Treasury Bills: 0.47%, 4/13/2017 [Member] |  |
Expiration date | 4/13/2017 |
Interest Rate | 0.47% |
Cash Equivalents [Member] | United State [Member] | U.S. Treasury Bills: 0.46%, 4/20/2017 [Member] |  |
Expiration date | 4/20/2017 |
Interest Rate | 0.46% |
Cash Equivalents [Member] | United State [Member] | U.S. Treasury Bills: 0.47%, 4/27/2017 [Member] |  |
Expiration date | 4/27/2017 |
Interest Rate | 0.47% |
Cash Equivalents [Member] | United State [Member] | U.S. Treasury Bills: 0.49%, 5/04/2017 [Member] |  |
Expiration date | 5/04/2017 |
Interest Rate | 0.49% |
Cash Equivalents [Member] | United State [Member] | U.S. Treasury Bills: 0.55%, 5/11/2017 [Member] |  |
Expiration date | 5/11/2017 |
Interest Rate | 0.55% |
Cash Equivalents [Member] | United State [Member] | U.S. Treasury Bills: 0.60%, 5/18/2017 [Member] |  |
Expiration date | 5/18/2017 |
Interest Rate | 0.60% |
Cash Equivalents [Member] | United State [Member] | U.S. Treasury Bills: 0.61%, 5/25/2017 [Member] |  |
Expiration date | 5/25/2017 |
Interest Rate | 0.61% |
Cash Equivalents [Member] | United State [Member] | U.S. Treasury Bills: 0.60%, 6/01/2017 [Member] |  |
Expiration date | 6/01/2017 |
Interest Rate | 0.60% |
Cash Equivalents [Member] | United State [Member] | U.S. Treasury Bills: 0.62%, 6/08/2017 [Member] |  |
Expiration date | 6/08/2017 |
Interest Rate | 0.62% |
Cash Equivalents [Member] | United State [Member] | U.S. Treasury Bills: 0.65%, 6/15/2017 [Member] |  |
Expiration date | 6/15/2017 |
Interest Rate | 0.65% |
Cash Equivalents [Member] | United State [Member] | U.S. Treasury Bills: 0.64%, 6/22/2017 [Member] |  |
Expiration date | 6/22/2017 |
Interest Rate | 0.64% |
Cash Equivalents [Member] | United State [Member] | U.S. Treasury Bills: 0.60%, 6/29/2017 [Member] |  |
Expiration date | 6/29/2017 |
Interest Rate | 0.60% |
Open Futures Contracts, Long [Member] | United State [Member] | NYMEX Natural Gas Futures NG February 2016 contracts, expiring January 2016 [Member] |  |
Expiration date |  | January 2016
Open Futures Contracts, Long [Member] | United State [Member] | NYMEX Natural Gas Futures NG March 2016 contracts, expiring February 2016 [Member] |  |
Expiration date |  | February 2016
Open Futures Contracts, Long [Member] | United State [Member] | NYMEX Natural Gas Futures NG April 2016 contracts, expiring March 2016 [Member] |  |
Expiration date |  | March 2016
Open Futures Contracts, Long [Member] | United State [Member] | NYMEX Natural Gas Futures NG May 2016 contracts, expiring April 2016 [Member] |  |
Expiration date |  | April 2016
Open Futures Contracts, Long [Member] | United State [Member] | NYMEX Natural Gas Futures NG June 2016 contracts, expiring May 2016 [Member] |  |
Expiration date |  | May 2016
Open Futures Contracts, Long [Member] | United State [Member] | NYMEX Natural Gas Futures NG July 2016 contracts, expiring June 2016 [Member] |  |
Expiration date |  | June 2016
Open Futures Contracts, Long [Member] | United State [Member] | NYMEX Natural Gas Futures NG August 2016 contracts, expiring July 2016 [Member] |  |
Expiration date |  | July 2016
Open Futures Contracts, Long [Member] | United State [Member] | NYMEX Natural Gas Futures NG September 2016 contracts, expiring August 2016 [Member] |  |
Expiration date |  | August 2016
Open Futures Contracts, Long [Member] | United State [Member] | NYMEX Natural Gas Futures NG October 2016 contracts, expiring September 2016 [Member] |  |
Expiration date |  | September 2016
Open Futures Contracts, Long [Member] | United State [Member] | NYMEX Natural Gas Futures NG November 2016 contracts, expiring October 2016 [Member] |  |
Expiration date |  | October 2016
Open Futures Contracts, Long [Member] | United State [Member] | NYMEX Natural Gas Futures NG December 2016 contracts, expiring November 2016 [Member] |  |
Expiration date |  | November 2016
Open Futures Contracts, Long [Member] | United State [Member] | NYMEX Natural Gas Futures NG January 2017 contracts, expiring December 2016 [Member] |  |
Expiration date |  | December 2016
Open Futures Contracts, Long [Member] | United State [Member] | NYMEX Natural Gas Futures NG February 2017 contracts, expiring January 2017 [Member] |  |
Expiration date | January 2017 |
Open Futures Contracts, Long [Member] | United State [Member] | NYMEX Natural Gas Futures NG March 2017 contracts, expiring February 2017 [Member] |  |
Expiration date | February 2017 |
Open Futures Contracts, Long [Member] | United State [Member] | NYMEX Natural Gas Futures NG April 2017 contracts, expiring March 2017 [Member] |  |
Expiration date | March 2017 |
Open Futures Contracts, Long [Member] | United State [Member] | NYMEX Natural Gas Futures NG May 2017 contracts, expiring April 2017 [Member] |  |
Expiration date | April 2017 |
Open Futures Contracts, Long [Member] | United State [Member] | NYMEX Natural Gas Futures NG June 2017 contracts, expiring May 2017 [Member] |  |
Expiration date | May 2017 |
Open Futures Contracts, Long [Member] | United State [Member] | NYMEX Natural Gas Futures NG July 2017 contracts, expiring June 2017 [Member] |  |
Expiration date | June 2017 |
Open Futures Contracts, Long [Member] | United State [Member] | NYMEX Natural Gas Futures NG August 2017 contracts, expiring July 2017 [Member] |  |
Expiration date | July 2017 |
Open Futures Contracts, Long [Member] | United State [Member] | NYMEX Natural Gas Futures NG September 2017 contracts, expiring August 2017 [Member] |  |
Expiration date | August 2017 |
Open Futures Contracts, Long [Member] | United State [Member] | NYMEX Natural Gas Futures NG October 2017 contracts, expiring September 2017 [Member] |  |
Expiration date | September 2017 |
Open Futures Contracts, Long [Member] | United State [Member] | NYMEX Natural Gas Futures NG November 2017 contracts, expiring October 2017 [Member] |  |
Expiration date | October 2017 |
Open Futures Contracts, Long [Member] | United State [Member] | NYMEX Natural Gas Futures NG December 2017 contracts, expiring November 2017 [Member] |  |
Expiration date | November 2017 |
Open Futures Contracts, Long [Member] | United State [Member] | NYMEX Natural Gas Futures NG January 2018 contracts, expiring December 2017 [Member] |  |
Expiration date | December 2017 |

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