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Condensed Schedule of Investments (Parenthetical)	9 Months Ended
	Sep. 30, 2019 USD ($)
Collateral Amount on Open Futures Contracts	$ 1,069,112
Cash Equivalents [Member] | United States Treasury Obligations [Member] | U.S. Treasury Bills:2.40%, 10/03/2019 [Member]
Expiration date	10/03/2019
Interest Rate	2.40%
Cash Equivalents [Member] | United States Treasury Obligations [Member] | U.S. Treasury Bills:2.41%, 10/10/2019 [Member]
Expiration date	10/10/2019
Interest Rate	2.41%
Cash Equivalents [Member] | United States Treasury Obligations [Member] | U.S. Treasury Bills:2.42%, 10/17/2019 [Member]
Expiration date	10/17/2019
Interest Rate	2.42%
Cash Equivalents [Member] | United States Treasury Obligations [Member] | U.S. Treasury Bills:2.40%, 10/24/2019 [Member]
Expiration date	10/24/2019
Interest Rate	2.40%
Cash Equivalents [Member] | United States Treasury Obligations [Member] | U.S. Treasury Bills:2.37%, 10/31/2019 [Member]
Expiration date	10/31/2019
Interest Rate	2.37%
Cash Equivalents [Member] | United States Treasury Obligations [Member] | U.S. Treasury Bills:2.40%, 11/07/2019 [Member]
Expiration date	11/07/2019
Interest Rate	2.40%
Cash Equivalents [Member] | United States Treasury Obligations [Member] | U.S. Treasury Bills:2.38%, 11/14/2019 [Member]
Expiration date	11/14/2019
Interest Rate	2.38%
Cash Equivalents [Member] | United States Treasury Obligations [Member] | U.S. Treasury Bills:2.37%, 11/21/2019 [Member]
Expiration date	11/21/2019
Interest Rate	2.37%
Cash Equivalents [Member] | United States Treasury Obligations [Member] | U.S. Treasury Bills:2.33%, 11/29/2019 [Member]
Expiration date	11/29/2019
Interest Rate	2.33%
Cash Equivalents [Member] | United States Treasury Obligations [Member] | U.S. Treasury Bills:2.20%, 12/05/2019[Member]
Expiration date	12/05/2019
Interest Rate	2.20%
Cash Equivalents [Member] | United States Treasury Obligations [Member] | U.S. Treasury Bills:2.16%, 12/12/2019 [Member]
Expiration date	12/12/2019
Interest Rate	2.16%
Cash Equivalents [Member] | United States Treasury Obligations [Member] | U.S. Treasury Bills:2.15%, 12/19/2019 [Member]
Expiration date	12/19/2019
Interest Rate	2.15%
Cash Equivalents [Member] | United States Treasury Obligations [Member] | U.S. Treasury Bills:2.07%, 12/26/2019 [Member]
Expiration date	12/26/2019
Interest Rate	2.07%
Cash Equivalents [Member] | United States Treasury Obligations [Member] | U.S. Treasury Bills:2.05%, 1/02/2020 [Member]
Expiration date	1/02/2020
Interest Rate	2.05%
Cash Equivalents [Member] | United States Treasury Obligations [Member] | U.S. Treasury Bills:2.03%, 1/09/2020 [Member]
Expiration date	1/09/2020
Interest Rate	2.03%
Cash Equivalents [Member] | United States Treasury Obligations [Member] | U.S. Treasury Bills:2.01%, 1/16/2020 [Member]
Expiration date	1/16/2020
Interest Rate	2.01%
Cash Equivalents [Member] | United States Treasury Obligations [Member] | U.S. Treasury Bills:2.04%, 1/23/2020 [Member]
Expiration date	1/23/2020
Interest Rate	2.04%
Cash Equivalents [Member] | United States Treasury Obligations [Member] | U.S. Treasury Bills:2.02%, 1/30/2020 [Member]
Expiration date	1/30/2020
Interest Rate	2.02%
Cash Equivalents [Member] | United States Treasury Obligations [Member] | U.S. Treasury Bills:1.90%, 2/06/2020 [Member]
Expiration date	2/06/2020
Interest Rate	1.90%
Cash Equivalents [Member] | United States Treasury Obligations [Member] | U.S. Treasury Bills:1.87%, 2/13/2020 [Member]
Expiration date	2/13/2020
Interest Rate	1.87%
Cash Equivalents [Member] | United States Treasury Obligations [Member] | U.S. Treasury Bills:1.85%, 2/20/2020 [Member]
Expiration date	2/20/2020
Interest Rate	1.85%
Cash Equivalents [Member] | United States Treasury Obligations [Member] | U.S. Treasury Bills:1.85%, 2/27/2020 [Member]
Expiration date	2/27/2020
Interest Rate	1.85%
Cash Equivalents [Member] | United States Treasury Obligations [Member] | U.S. Treasury Bills:1.83%, 3/05/2020 [Member]
Expiration date	3/05/2020
Interest Rate	1.83%
Cash Equivalents [Member] | United States Treasury Obligations [Member] | U.S. Treasury Bills:1.84%, 3/19/2020 [Member]
Expiration date	3/19/2020
Interest Rate	1.84%
Cash Equivalents [Member] | United States Treasury Obligations [Member] | U.S. Treasury Bills:1.88%, 3/26/2020 [Member]
Expiration date	3/26/2020
Interest Rate	1.88%

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