Schedule of Investments [Parenthetical] - USD ($)
|
12 Months Ended |
Dec. 31, 2016 |
Dec. 31, 2015 |
| Interest rate |
|
0.005%
|
| Collateral amount on open futures contracts |
$ 8,297,821
|
$ 20,732,135
|
| Cash Equivalents [Member] | United States [Member] | U.S. Treasury Bills,0.34%, 01/05/2017 | Us Treasury Securities [Member] |
|
|
| Interest rate |
0.34%
|
|
| Expiration date |
1/05/2017
|
|
| 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 |
1/19/2017
|
|
| 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 |
2/02/2017
|
|
| 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 |
2/09/2017
|
|
| 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 |
2/16/2017
|
|
| 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 |
2/23/2017
|
|
| 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 |
3/02/2017
|
|
| 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 |
3/09/2017
|
|
| 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 |
3/16/2017
|
|
| 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 |
3/23/2017
|
|
| 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 |
3/30/2017
|
|
| Cash Equivalents [Member] | United States [Member] | U.S. Treasury Bills,0.46%, 4/06/2017 | Us Treasury Securities [Member] |
|
|
| Interest rate |
0.46%
|
|
| Expiration date |
4/06/2017
|
|
| Cash Equivalents [Member] | United States [Member] | U.S. Treasury Bills,0.47%, 4/13/2017 | Us Treasury Securities [Member] |
|
|
| Interest rate |
0.47%
|
|
| Expiration date |
4/13/2017
|
|
| Cash Equivalents [Member] | United States [Member] | U.S. Treasury Bills,0.46%, 4/20/2017 | Us Treasury Securities [Member] |
|
|
| Interest rate |
0.46%
|
|
| Expiration date |
4/20/2017
|
|
| Cash Equivalents [Member] | United States [Member] | U.S. Treasury Bills,0.47%, 4/27/2017 | Us Treasury Securities [Member] |
|
|
| Interest rate |
0.47%
|
|
| Expiration date |
4/27/2017
|
|
| Cash Equivalents [Member] | United States [Member] | U.S. Treasury Bills,0.49%, 5/04/2017 | Us Treasury Securities [Member] |
|
|
| Interest rate |
0.49%
|
|
| Expiration date |
5/04/2017
|
|
| Cash Equivalents [Member] | United States [Member] | U.S. Treasury Bills,0.55%, 5/11/2017 | Us Treasury Securities [Member] |
|
|
| Interest rate |
0.55%
|
|
| Expiration date |
5/11/2017
|
|
| Cash Equivalents [Member] | United States [Member] | U.S. Treasury Bills,0.60%, 5/18/2017 | Us Treasury Securities [Member] |
|
|
| Interest rate |
0.60%
|
|
| Expiration date |
5/18/2017
|
|
| Cash Equivalents [Member] | United States [Member] | U.S. Treasury Bills,0.61%, 5/25/2017 | Us Treasury Securities [Member] |
|
|
| Interest rate |
0.61%
|
|
| Expiration date |
5/25/2017
|
|
| Cash Equivalents [Member] | United States [Member] | U.S. Treasury Bills,0.60%, 6/01/2017 | Us Treasury Securities [Member] |
|
|
| Interest rate |
0.60%
|
|
| Expiration date |
6/01/2017
|
|
| Cash Equivalents [Member] | United States [Member] | U.S. Treasury Bills,0.62%, 6/08/2017 | Us Treasury Securities [Member] |
|
|
| Interest rate |
0.62%
|
|
| Expiration date |
6/08/2017
|
|
| Cash Equivalents [Member] | United States [Member] | U.S. Treasury Bills,0.65%, 6/15/2017 | Us Treasury Securities [Member] |
|
|
| Interest rate |
0.65%
|
|
| Expiration date |
6/15/2017
|
|
| Cash Equivalents [Member] | United States [Member] | U.S. Treasury Bills,0.64%, 6/22/2017 | Us Treasury Securities [Member] |
|
|
| Interest rate |
0.64%
|
|
| Expiration date |
6/22/2017
|
|
| Cash Equivalents [Member] | United States [Member] | U.S. Treasury Bills,0.60%, 6/29/2017 | Us Treasury Securities [Member] |
|
|
| Interest rate |
0.60%
|
|
| Expiration date |
6/29/2017
|
|
| Cash Equivalents [Member] | United States [Member] | U.S. Treasury Bills,0.11%, 1/14/2016 | Us Treasury Securities [Member] |
|
|
| Interest rate |
|
0.11%
|
| Expiration date |
|
1/14/2016
|
| Cash Equivalents [Member] | United States [Member] | U.S. Treasury Bills,0.13%, 1/21/2016 | Us Treasury Securities [Member] |
|
|
| Interest rate |
|
0.13%
|
| Expiration date |
|
1/21/2016
|
| Cash Equivalents [Member] | United States [Member] | U.S. Treasury Bills,0.15%, 1/28/2016 | Us Treasury Securities [Member] |
|
|
| Interest rate |
|
0.15%
|
| Expiration date |
|
1/28/2016
|
| Cash Equivalents [Member] | United States [Member] | U.S. Treasury Bills,0.19%, 2/04/2016 | Us Treasury Securities [Member] |
|
|
| Interest rate |
|
0.19%
|
| Expiration date |
|
2/04/2016
|
| Cash Equivalents [Member] | United States [Member] | U.S. Treasury Bills,0.22%, 2/11/2016 | Us Treasury Securities [Member] |
|
|
| Interest rate |
|
0.22%
|
| Expiration date |
|
2/11/2016
|
| Cash Equivalents [Member] | United States [Member] | U.S. Treasury Bills,0.20%, 2/18/2016 | Us Treasury Securities [Member] |
|
|
| Interest rate |
|
0.20%
|
| Expiration date |
|
2/18/2016
|
| Cash Equivalents [Member] | United States [Member] | U.S. Treasury Bills,0.23%, 3/03/2016 | Us Treasury Securities [Member] |
|
|
| Interest rate |
|
0.23%
|
| Expiration date |
|
3/03/2016
|
| Cash Equivalents [Member] | United States [Member] | U.S. Treasury Bills,0.26%, 3/10/2016 | Us Treasury Securities [Member] |
|
|
| Interest rate |
|
0.26%
|
| Expiration date |
|
3/10/2016
|
| Cash Equivalents [Member] | United States [Member] | U.S. Treasury Bills,0.24%, 3/17/2016 | Us Treasury Securities [Member] |
|
|
| Interest rate |
|
0.24%
|
| Expiration date |
|
3/17/2016
|
| Cash Equivalents [Member] | United States [Member] | U.S. Treasury Bills,0.09%, 3/24/2016 | Us Treasury Securities [Member] |
|
|
| Interest rate |
|
0.09%
|
| Expiration date |
|
3/24/2016
|
| Cash Equivalents [Member] | United States [Member] | U.S. Treasury Bills,0.07%, 3/31/2016 | Us Treasury Securities [Member] |
|
|
| Interest rate |
|
0.07%
|
| Expiration date |
|
3/31/2016
|
| Cash Equivalents [Member] | United States [Member] | U.S. Treasury Bills,0.07%, 4/07/2016 | Us Treasury Securities [Member] |
|
|
| Interest rate |
|
0.07%
|
| Expiration date |
|
4/07/2016
|
| Cash Equivalents [Member] | United States [Member] | U.S. Treasury Bills,0.07%, 4/14/2016 | Us Treasury Securities [Member] |
|
|
| Interest rate |
|
0.07%
|
| Expiration date |
|
4/14/2016
|
| Cash Equivalents [Member] | United States [Member] | U.S. Treasury Bills,0.11%, 4/21/2016 | Us Treasury Securities [Member] |
|
|
| Interest rate |
|
0.11%
|
| Expiration date |
|
4/21/2016
|
| Cash Equivalents [Member] | United States [Member] | U.S. Treasury Bills,0.21%, 4/28/2016 | Us Treasury Securities [Member] |
|
|
| Interest rate |
|
0.21%
|
| Expiration date |
|
4/28/2016
|
| Cash Equivalents [Member] | United States [Member] | U.S. Treasury Bills,0.26%, 5/05/2016 | Us Treasury Securities [Member] |
|
|
| Interest rate |
|
0.26%
|
| Expiration date |
|
5/05/2016
|
| Cash Equivalents [Member] | United States [Member] | U.S. Treasury Bills,0.33%, 5/12/2016 | Us Treasury Securities [Member] |
|
|
| Interest rate |
|
0.33%
|
| Expiration date |
|
5/12/2016
|
| Cash Equivalents [Member] | United States [Member] | U.S. Treasury Bills,0.31%, 5/19/2016 | Us Treasury Securities [Member] |
|
|
| Interest rate |
|
0.31%
|
| Expiration date |
|
5/19/2016
|
| Cash Equivalents [Member] | United States [Member] | U.S. Treasury Bills,0.35%, 5/26/2016 | Us Treasury Securities [Member] |
|
|
| Interest rate |
|
0.35%
|
| Expiration date |
|
5/26/2016
|
| Cash Equivalents [Member] | United States [Member] | U.S. Treasury Bills,0.43%, 6/02/2016 | Us Treasury Securities [Member] |
|
|
| Interest rate |
|
0.43%
|
| Expiration date |
|
6/02/2016
|
| Cash Equivalents [Member] | United States [Member] | U.S. Treasury Bills,0.52%, 6/09/2016 | Us Treasury Securities [Member] |
|
|
| Interest rate |
|
0.52%
|
| Expiration date |
|
6/09/2016
|
| Cash Equivalents [Member] | United States [Member] | U.S. Treasury Bills,0.48%, 6/16/2016 | Us Treasury Securities [Member] |
|
|
| Interest rate |
|
0.48%
|
| Expiration date |
|
6/16/2016
|
| Cash Equivalents [Member] | United States [Member] | U.S. Treasury Bills,0.46%, 6/23/2016 | Us Treasury Securities [Member] |
|
|
| Interest rate |
|
0.46%
|
| Expiration date |
|
6/23/2016
|
| Cash Equivalents [Member] | United States [Member] | U.S. Treasury Bills,0.47%, 6/30/2016 | Us Treasury Securities [Member] |
|
|
| Interest rate |
|
0.47%
|
| Expiration date |
|
6/30/2016
|
| Open Futures Contracts - Long [Member] | United States [Member] | ICE Brent Crude Oil Futures CO February 2016 contracts, expiring January 2016 [Member] |
|
|
| Expiration date |
|
January 2016
|
| Open Futures Contracts - Long [Member] | United States [Member] | ICE Brent Crude Oil Futures CO March 2016 contracts, expiring January 2016 [Member] |
|
|
| Expiration date |
|
January 2016
|
| Open Futures Contracts - Long [Member] | United States [Member] | Ice Brent Crude Oil Futures Co March 2017 Contracts Expiring January 2017 [Member] |
|
|
| Expiration date |
January 2017
|
|