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Condensed Schedule of Investments [Parenthetical] | 9 Months Ended
--- | ---
Sep. 30, 2017 USD ($)
Collateral amount on open futures contracts | $ 13,446,411
Cash Equivalents [Member] | United States [Member] | Us Treasury Securities [Member] | US Treasury Bill Securities One [Member] |
Interest rate | 0.90%
Expiration date | 10/05/2017
Cash Equivalents [Member] | United States [Member] | Us Treasury Securities [Member] | US Treasury Bill Securities Two [Member] |
Interest rate | 0.92%
Expiration date | 10/12/2017
Cash Equivalents [Member] | United States [Member] | Us Treasury Securities [Member] | US Treasury Bill Securities Three [Member] |
Interest rate | 0.91%
Expiration date | 10/19/2017
Cash Equivalents [Member] | United States [Member] | Us Treasury Securities [Member] | US Treasury Bill Securities Four [Member] |
Interest rate | 0.95%
Expiration date | 10/26/2017
Cash Equivalents [Member] | United States [Member] | Us Treasury Securities [Member] | US Treasury Bill Securities Five [Member] |
Interest rate | 0.97%
Expiration date | 11/02/2017
Cash Equivalents [Member] | United States [Member] | Us Treasury Securities [Member] | US Treasury Bill Securities Six [Member] |
Interest rate | 1.01%
Expiration date | 11/09/2017
Cash Equivalents [Member] | United States [Member] | Us Treasury Securities [Member] | US Treasury Bill Securities Seven [Member] |
Interest rate | 0.98%
Expiration date | 11/16/2017
Cash Equivalents [Member] | United States [Member] | Us Treasury Securities [Member] | US Treasury Bill Securities Eight [Member] |
Interest rate | 1.05%
Expiration date | 11/24/2017
Cash Equivalents [Member] | United States [Member] | Us Treasury Securities [Member] | US Treasury Bill Securities Nine [Member] |
Interest rate | 1.05%
Expiration date | 11/30/2017
Cash Equivalents [Member] | United States [Member] | Us Treasury Securities [Member] | US Treasury Bill Securities Ten [Member] |
Interest rate | 1.08%
Expiration date | 12/07/2017
Cash Equivalents [Member] | United States [Member] | Us Treasury Securities [Member] | US Treasury Bill Securities Eleven [Member] |
Interest rate | 1.09%
Expiration date | 12/14/2017
Cash Equivalents [Member] | United States [Member] | Us Treasury Securities [Member] | US Treasury Bill Securities Twelve [Member] |
Interest rate | 1.11%
Expiration date | 12/21/2017
Cash Equivalents [Member] | United States [Member] | Us Treasury Securities [Member] | US Treasury Bill Securities Thirteen [Member] |
Interest rate | 1.10%
Expiration date | 12/28/2017
Cash Equivalents [Member] | United States [Member] | Us Treasury Securities [Member] | US Treasury Bill Securities Fourteen [Member] |
Interest rate | 1.12%
Expiration date | 1/04/2018
Cash Equivalents [Member] | United States [Member] | Us Treasury Securities [Member] | US Treasury Bill Securities Fifteen [Member] |
Interest rate | 1.11%
Expiration date | 1/11/2018
Cash Equivalents [Member] | United States [Member] | Us Treasury Securities [Member] | US Treasury Bill Securities Sixteen [Member] |
Interest rate | 1.10%
Expiration date | 1/18/2018
Cash Equivalents [Member] | United States [Member] | Us Treasury Securities [Member] | US Treasury Bill Securities Seventeen [Member] |
Interest rate | 1.12%
Expiration date | 1/25/2018
Cash Equivalents [Member] | United States [Member] | Us Treasury Securities [Member] | US Treasury Bill Securities Eighteen [Member] |
Interest rate | 1.12%
Expiration date | 2/01/2018
Cash Equivalents [Member] | United States [Member] | Us Treasury Securities [Member] | US Treasury Bill Securities Nineteen [Member] |
Interest rate | 1.13%
Expiration date | 2/08/2018
Cash Equivalents [Member] | United States [Member] | Us Treasury Securities [Member] | US Treasury Bill Securities Twenty [Member] |
Interest rate | 1.12%
Expiration date | 2/15/2018
Cash Equivalents [Member] | United States [Member] | Us Treasury Securities [Member] | US Treasury Bill Securities Twenty One [Member] |
Interest rate | 1.10%
Expiration date | 2/22/2018
Cash Equivalents [Member] | United States [Member] | Us Treasury Securities [Member] | US Treasury Bill Securities Twenty Two [Member] |
Interest rate | 1.09%
Expiration date | 3/01/2018
Cash Equivalents [Member] | United States [Member] | Us Treasury Securities [Member] | US Treasury Bill Securities Twenty Three [Member] |
Interest rate | 1.14%
Expiration date | 3/08/2018
Cash Equivalents [Member] | United States [Member] | Us Treasury Securities [Member] | US Treasury Bill Securities Twenty Four [Member] |
Interest rate | 1.14%
Expiration date | 3/15/2018
Cash Equivalents [Member] | United States [Member] | Us Treasury Securities [Member] | US Treasury Bill Securities Twenty Five [Member] |
Interest rate | 1.16%
Expiration date | 3/22/2018
Cash Equivalents [Member] | United States [Member] | Us Treasury Securities [Member] | US Treasury Bill Securities Twenty Six [Member] |
Interest rate | 1.17%
Expiration date | 3/29/2018

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