Schedule of Investments (Parenthetical) - USD ($)	12 Months Ended
Dec. 31, 2019	Dec. 31, 2018
Collateral Amount on Open Futures Contracts	$ 803,973	$ 596,555
Cash Equivalents [Member] \| United States Treasury Obligations [Member] \| U.S. Treasury Bills:2.10%, 1/03/2019 [Member]
Expiration date		1/03/2019
Interest Rate		2.10%
Cash Equivalents [Member] \| United States Treasury Obligations [Member] \| U.S. Treasury Bills:2.10%, 1/10/2019 [Member]
Expiration date		1/10/2019
Interest Rate		2.10%
Cash Equivalents [Member] \| United States Treasury Obligations [Member] \| U.S. Treasury Bills:2.13%, 1/17/2019 [Member]
Expiration date		1/17/2019
Interest Rate		2.13%
Cash Equivalents [Member] \| United States Treasury Obligations [Member] \| U.S. Treasury Bills:2.15%, 1/24/2019 [Member]
Expiration date		1/24/2019
Interest Rate		2.15%
Cash Equivalents [Member] \| United States Treasury Obligations [Member] \| U.S. Treasury Bills:2.18%, 1/31/2019 [Member]
Expiration date		1/31/2019
Interest Rate		2.18%
Cash Equivalents [Member] \| United States Treasury Obligations [Member] \| U.S. Treasury Bills:2.20%, 2/07/2019 [Member]
Expiration date		2/07/2019
Interest Rate		2.20%
Cash Equivalents [Member] \| United States Treasury Obligations [Member] \| U.S. Treasury Bills:2.19%, 2/14/2019 [Member]
Expiration date		2/14/2019
Interest Rate		2.19%
Cash Equivalents [Member] \| United States Treasury Obligations [Member] \| U.S. Treasury Bills:2.20%, 2/21/2019 [Member]
Expiration date		2/21/2019
Interest Rate		2.20%
Cash Equivalents [Member] \| United States Treasury Obligations [Member] \| U.S. Treasury Bills:2.24%, 2/28/2019 [Member]
Expiration date		2/28/2019
Interest Rate		2.24%
Cash Equivalents [Member] \| United States Treasury Obligations [Member] \| U.S. Treasury Bills:2.38%, 3/07/2019 [Member]
Expiration date		3/07/2019
Interest Rate		2.38%
Cash Equivalents [Member] \| United States Treasury Obligations [Member] \| U.S. Treasury Bills:2.28%, 3/14/2019 [Member]
Expiration date		3/14/2019
Interest Rate		2.28%
Cash Equivalents [Member] \| United States Treasury Obligations [Member] \| U.S. Treasury Bills:2.33%, 3/21/2019 [Member]
Expiration date		3/21/2019
Interest Rate		2.33%
Cash Equivalents [Member] \| United States Treasury Obligations [Member] \| U.S. Treasury Bills:2.34%, 3/28/2019 [Member]
Expiration date		3/28/2019
Interest Rate		2.34%
Cash Equivalents [Member] \| United States Treasury Obligations [Member] \| U.S. Treasury Bills:2.37%, 4/04/2019 [Member]
Expiration date		4/04/2019
Interest Rate		2.37%
Cash Equivalents [Member] \| United States Treasury Obligations [Member] \| U.S. Treasury Bills:2.41%, 4/11/2019 [Member]
Expiration date		4/11/2019
Interest Rate		2.41%
Cash Equivalents [Member] \| United States Treasury Obligations [Member] \| U.S. Treasury Bills:2.42%, 4/18/2019 [Member]
Expiration date		4/18/2019
Interest Rate		2.42%
Cash Equivalents [Member] \| United States Treasury Obligations [Member] \| U.S. Treasury Bills:2.43%, 4/25/2019 [Member]
Expiration date		4/25/2019
Interest Rate		2.43%
Cash Equivalents [Member] \| United States Treasury Obligations [Member] \| U.S. Treasury Bills:2.46%, 5/02/2019 [Member]
Expiration date		5/02/2019
Interest Rate		2.46%
Cash Equivalents [Member] \| United States Treasury Obligations [Member] \| U.S. Treasury Bills:2.47%, 5/09/2019 [Member]
Expiration date		5/09/2019
Interest Rate		2.47%
Cash Equivalents [Member] \| United States Treasury Obligations [Member] \| U.S. Treasury Bills:2.48%, 5/16/2019 [Member]
Expiration date		5/16/2019
Interest Rate		2.48%
Cash Equivalents [Member] \| United States Treasury Obligations [Member] \| U.S. Treasury Bills:2.50%, 5/23/2019 [Member]
Expiration date		5/23/2019
Interest Rate		2.50%
Cash Equivalents [Member] \| United States Treasury Obligations [Member] \| U.S. Treasury Bills:2.49%, 5/30/2019 [Member]
Expiration date		5/30/2019
Interest Rate		2.49%
Cash Equivalents [Member] \| United States Treasury Obligations [Member] \| U.S. Treasury Bills:2.51%, 6/06/2019 [Member]
Expiration date		6/06/2019
Interest Rate		2.51%
Cash Equivalents [Member] \| United States Treasury Obligations [Member] \| U.S. Treasury Bills:2.51%, 6/13/2019 [Member]
Expiration date		6/13/2019
Interest Rate		2.51%
Cash Equivalents [Member] \| United States Treasury Obligations [Member] \| U.S. Treasury Bills:2.49%, 6/20/2019 [Member]
Expiration date		6/20/2019
Interest Rate		2.49%
Cash Equivalents [Member] \| United States Treasury Obligations [Member] \| U.S. Treasury Bills:2.49%, 6/27/2019 [Member]
Expiration date		6/27/2019
Interest Rate		2.49%
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%
Cash Equivalents [Member] \| United States Treasury Obligations [Member] \| U.S. Treasury Bills:1.70%, 4/02/2020 [Member]
Expiration date	4/02/2020
Interest Rate	1.70%
Cash Equivalents [Member] \| United States Treasury Obligations [Member] \| U.S. Treasury Bills:1.64%, 4/09/2020 [Member]
Expiration date	4/09/2020
Interest Rate	1.64%
Cash Equivalents [Member] \| United States Treasury Obligations [Member] \| U.S. Treasury Bills: 1.60%, 4/16/2020 [Member]
Expiration date	4/16/2020
Interest Rate	1.60%
Cash Equivalents [Member] \| United States Treasury Obligations [Member] \| U.S. Treasury Bills: 1.60%, 4/23/2020 [Member]
Expiration date	4/23/2020
Interest Rate	1.60%
Cash Equivalents [Member] \| United States Treasury Obligations [Member] \| U.S. Treasury Bills: 1.59%, 4/30/2020 [Member]
Expiration date	4/30/2020
Interest Rate	1.59%
Cash Equivalents [Member] \| United States Treasury Obligations [Member] \| U.S. Treasury Bills: 1.54%, 5/07/2020 [Member]
Expiration date	5/07/2020
Interest Rate	1.54%
Cash Equivalents [Member] \| United States Treasury Obligations [Member] \| U.S. Treasury Bills: 1.55%, 5/14/2020 [Member]
Expiration date	5/14/2020
Interest Rate	1.55%
Cash Equivalents [Member] \| United States Treasury Obligations [Member] \| U.S. Treasury Bills: 1.55%, 5/21/2020 [Member]
Expiration date	5/21/2020
Interest Rate	1.55%
Cash Equivalents [Member] \| United States Treasury Obligations [Member] \| U.S. Treasury Bills: 1.58%, 5/28/2020 [Member]
Expiration date	5/28/2020
Interest Rate	1.58%
Cash Equivalents [Member] \| United States Treasury Obligations [Member] \| U.S. Treasury Bills: 1.53%, 6/04/2020 [Member]
Expiration date	6/04/2020
Interest Rate	1.53%
Cash Equivalents [Member] \| United States Treasury Obligations [Member] \| U.S. Treasury Bills: 1.53%, 6/11/2020 [member]
Expiration date	6/11/2020
Interest Rate	1.53%
Cash Equivalents [Member] \| United States Treasury Obligations [Member] \| U.S. Treasury Bills: 1.54%, 6/18/2020 [Member]
Expiration date	6/18/2020
Interest Rate	1.54%
Cash Equivalents [Member] \| United States Treasury Obligations [Member] \| U.S. Treasury Bills: 1.57%, 6/25/2020 [Member]
Expiration date	6/25/2020
Interest Rate	1.57%

Amount of assets pledged to secure a debt instrument.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 470
-Section 50
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- Definition

Contractual interest rate for funds borrowed, under the debt agreement.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.22(a)(1))
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- Definition

The list of dates or date range within which the options may be exercised of the investment subject to option.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 946
-SubTopic 320
-Section S99
-Paragraph 5
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-Name Accounting Standards Codification
-Topic 946
-SubTopic 320
-Section S99
-Paragraph 6
-Subparagraph (SX 210.12-14.4(b))
-URI http://asc.fasb.org/extlink&oid=50485924&loc=d3e611322-123010

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