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Condensed Schedule of Investments	Jun. 30, 2016 USD ($) Contracts
United State [Member] | Money Market Funds [Member]
Market Values	$ 2,500,000
% of Partners' Capital	16.78%
United State [Member] | Goldman Sachs Financial Square Funds - Government Fund - Class FS [Member] | Money Market Funds [Member]
Principal Amount	$ 500,000
Market Values	$ 500,000
% of Partners' Capital	3.36%
United State [Member] | Morgan Stanley Institutional Liquidity Funds - Government Portfolio [Member] | Money Market Funds [Member]
Principal Amount	$ 2,000,000
Market Values	$ 2,000,000
% of Partners' Capital	13.42%
Cash Equivalents [Member] | US Treasury Securities [Member]
Market Values	$ 7,492,320
% of Partners' Capital	50.30%
Cash Equivalents [Member] | US Treasury Securities [Member] | U.S. Treasury Bills: 0.38%, 7/21/2016
Principal Amount	$ 500,000
Market Values	$ 499,894
% of Partners' Capital	3.36%
Cash Equivalents [Member] | US Treasury Securities [Member] | U.S. Treasury Bills: 0.39%, 7/28/2016
Principal Amount	$ 500,000
Market Values	$ 499,854
% of Partners' Capital	3.36%
Cash Equivalents [Member] | US Treasury Securities [Member] | U.S. Treasury Bills: 0.42%, 8/04/2016
Principal Amount	$ 500,000
Market Values	$ 499,804
% of Partners' Capital	3.36%
Cash Equivalents [Member] | US Treasury Securities [Member] | U.S. Treasury Bills: 0.41%, 8/11/2016
Principal Amount	$ 500,000
Market Values	$ 499,767
% of Partners' Capital	3.36%
Cash Equivalents [Member] | US Treasury Securities [Member] | U.S. Treasury Bills: 0.43%, 8/18/2016
Principal Amount	$ 500,000
Market Values	$ 499,717
% of Partners' Capital	3.36%
Cash Equivalents [Member] | US Treasury Securities [Member] | U.S. Treasury Bills: 0.45%, 8/25/2016
Principal Amount	$ 500,000
Market Values	$ 499,660
% of Partners' Capital	3.35%
Cash Equivalents [Member] | US Treasury Securities [Member] | U.S. Treasury Bills: 0.48%, 9/01/2016
Principal Amount	$ 500,000
Market Values	$ 499,587
% of Partners' Capital	3.35%
Cash Equivalents [Member] | US Treasury Securities [Member] | U.S. Treasury Bills: 0.45%, 9/15/2016
Principal Amount	$ 500,000
Market Values	$ 499,525
% of Partners' Capital	3.35%
Cash Equivalents [Member] | US Treasury Securities [Member] | U.S. Treasury Bills: 0.44%, 9/22/2016
Principal Amount	$ 400,000
Market Values	$ 399,594
% of Partners' Capital	2.68%
Cash Equivalents [Member] | US Treasury Securities [Member] | U.S. Treasury Bills: 0.39%, 10/27/2016
Principal Amount	$ 400,000
Market Values	$ 399,485
% of Partners' Capital	2.68%
Cash Equivalents [Member] | US Treasury Securities [Member] | U.S. Treasury Bills: 0.37%, 11/03/2016
Principal Amount	$ 200,000
Market Values	$ 199,741
% of Partners' Capital	1.34%
Cash Equivalents [Member] | US Treasury Securities [Member] | U.S. Treasury Bills: 0.39%, 11/17/2016
Principal Amount	$ 500,000
Market Values	$ 499,247
% of Partners' Capital	3.35%
Cash Equivalents [Member] | US Treasury Securities [Member] | U.S. Treasury Bills: 0.47%, 12/01/2016
Principal Amount	$ 500,000
Market Values	$ 499,012
% of Partners' Capital	3.35%
Cash Equivalents [Member] | US Treasury Securities [Member] | U.S. Treasury Bills: 0.41%, 12/08/2016
Principal Amount	$ 500,000
Market Values	$ 499,089
% of Partners' Capital	3.35%
Cash Equivalents [Member] | US Treasury Securities [Member] | U.S. Treasury Bills: 0.34%, 12/15/2016
Principal Amount	$ 500,000
Market Values	$ 499,211
% of Partners' Capital	3.35%
Cash Equivalents [Member] | US Treasury Securities [Member] | U.S. Treasury Bills: 0.34%, 12/29/2016
Principal Amount	$ 500,000
Market Values	$ 499,133
% of Partners' Capital	3.35%
Cash Equivalents [Member] | United State [Member]
Market Values	$ 9,992,320
% of Partners' Capital	67.08%
Open Futures Contracts, Long [Member] | United State [Member]
Number of Contracts | Contracts	474	[1]
Unrealized Gain (Loss) on Open Commodity Contracts	$ 1,457,031	[1]
% of Partners' Capital	9.78%	[1]
Open Futures Contracts, Long [Member] | United State [Member] | NYMEX Natural Gas Futures NG August 2016 contracts, expiring July 2016
Number of Contracts | Contracts	39
Unrealized Gain (Loss) on Open Commodity Contracts	$ (52,185)
% of Partners' Capital	(0.35%)
Open Futures Contracts, Long [Member] | United State [Member] | NYMEX Natural Gas Futures NG September 2016 contracts, expiring August 2016
Number of Contracts | Contracts	40
Unrealized Gain (Loss) on Open Commodity Contracts	$ (1,109)
% of Partners' Capital	(0.01%)
Open Futures Contracts, Long [Member] | United State [Member] | NYMEX Natural Gas Futures NG October 2016 contracts, expiring September 2016
Number of Contracts | Contracts	39
Unrealized Gain (Loss) on Open Commodity Contracts	$ 21,831
% of Partners' Capital	0.15%
Open Futures Contracts, Long [Member] | United State [Member] | NYMEX Natural Gas Futures NG November 2016 contracts, expiring October 2016
Number of Contracts | Contracts	40
Unrealized Gain (Loss) on Open Commodity Contracts	$ 82,489
% of Partners' Capital	0.55%
Open Futures Contracts, Long [Member] | United State [Member] | NYMEX Natural Gas Futures NG December 2016 contracts, expiring November 2016
Number of Contracts | Contracts	39
Unrealized Gain (Loss) on Open Commodity Contracts	$ 175,978
% of Partners' Capital	1.18%
Open Futures Contracts, Long [Member] | United State [Member] | NYMEX Natural Gas Futures NG January 2017 contracts, expiring December 2016
Number of Contracts | Contracts	40
Unrealized Gain (Loss) on Open Commodity Contracts	$ 305,238
% of Partners' Capital	2.05%
Open Futures Contracts, Long [Member] | United State [Member] | NYMEX Natural Gas Futures NG February 2017 contracts, expiring January 2017
Number of Contracts | Contracts	39
Unrealized Gain (Loss) on Open Commodity Contracts	$ 219,081
% of Partners' Capital	1.47%
Open Futures Contracts, Long [Member] | United State [Member] | NYMEX Natural Gas Futures NG March 2017 contracts, expiring February 2017
Number of Contracts | Contracts	40
Unrealized Gain (Loss) on Open Commodity Contracts	$ 263,003
% of Partners' Capital	1.77%
Open Futures Contracts, Long [Member] | United State [Member] | NYMEX Natural Gas Futures NG April 2017 contracts, expiring March 2017
Number of Contracts | Contracts	39
Unrealized Gain (Loss) on Open Commodity Contracts	$ 191,120
% of Partners' Capital	1.28%
Open Futures Contracts, Long [Member] | United State [Member] | NYMEX Natural Gas Futures NG February 2016 contracts, expiring January 2016 [Member]
Number of Contracts | Contracts	40
Unrealized Gain (Loss) on Open Commodity Contracts	$ 132,747
% of Partners' Capital	0.89%
Open Futures Contracts, Long [Member] | United State [Member] | NYMEX Natural Gas Futures NG March 2016 contracts, expiring February 2016 [Member]
Number of Contracts | Contracts	39
Unrealized Gain (Loss) on Open Commodity Contracts	$ 83,208
% of Partners' Capital	0.56%
Open Futures Contracts, Long [Member] | United State [Member] | NYMEX Natural Gas Futures NG April 2016 contracts, expiring March 2016 [Member]
Number of Contracts | Contracts	40
Unrealized Gain (Loss) on Open Commodity Contracts	$ 35,630
% of Partners' Capital	0.24%
[1] Collateral amounted to $1,674,775 on open futures contracts.

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