Condensed Schedule of Investments (USD $)	Dec. 31, 2013		Dec. 31, 2012
Cash Equivalents [Member]
Market Values	$ 22,522,078		$ 23,922,430
% of Partners' Capital	81.95%		55.52%
Cash Equivalents [Member] | United State [Member] | Money Market Funds [Member]
Market Values	19,522,574		20,522,574
% of Partners' Capital	71.04%		47.63%
Cash Equivalents [Member] | United State [Member] | U.S. Treasury Bill [Member] | US Treasury Securities [Member]
Principal Amount	3,000,000		3,400,000
Market Values	2,999,504		3,399,856
% of Partners' Capital	10.91%		7.89%
Cash Equivalents [Member] | United State [Member] | Fidelity Institutional Government Portfolio - Class I [Member] | Money Market Funds [Member]
Principal Amount	2,009,115		2,509,115
Market Values	2,009,115		2,509,115
% of Partners' Capital	7.31%		5.82%
Cash Equivalents [Member] | United State [Member] | Goldman Sachs Financial Square Funds - Government Fund - Class FS [Member] | Money Market Funds [Member]
Principal Amount	1,002,300		1,502,300
Market Values	1,002,300		1,502,300
% of Partners' Capital	3.65%		3.49%
Cash Equivalents [Member] | United State [Member] | Morgan Stanley Institutional Liquidity Fund - Government Portfolio [Member] | Money Market Funds [Member]
Principal Amount	6,510,691		6,510,691
Market Values	6,510,691		6,510,691
% of Partners' Capital	23.69%		15.11%
Cash Equivalents [Member] | United State [Member] | Wells Fargo Advantage Government Money Market Fund - Class I [Member] | Money Market Funds [Member]
Principal Amount	10,000,468		10,000,468
Market Values	10,000,468		10,000,468
% of Partners' Capital	36.39%		23.21%
Open Futures Contracts, Long [Member] | United State [Member]
Number of Contracts	656	[1]	1,197	[2]
Unrealized Gain (Loss) on Open Commodity Contracts	1,090,050	[1]	(906,580)	[2]
% of Partners' Capital	3.97%	[1]	(2.10%)	[2]
Open Futures Contracts, Long [Member] | United State [Member] | NYMEX Natural Gas Futures NG February contracts, expiring January [Member]
Number of Contracts	54		99
Unrealized Gain (Loss) on Open Commodity Contracts	91,970		(205,290)
% of Partners' Capital	0.34%		(0.48%)
Open Futures Contracts, Long [Member] | United State [Member] | NYMEX Natural Gas Futures NG March contracts, expiring February [Member]
Number of Contracts	55		100
Unrealized Gain (Loss) on Open Commodity Contracts	143,450		(178,200)
% of Partners' Capital	0.52%		(0.41%)
Open Futures Contracts, Long [Member] | United State [Member] | NYMEX Natural Gas Futures NG April contracts, expiring March [Member]
Number of Contracts	54		100
Unrealized Gain (Loss) on Open Commodity Contracts	69,830		(20,820)
% of Partners' Capital	0.25%		(0.05%)
Open Futures Contracts, Long [Member] | United State [Member] | NYMEX Natural Gas Futures NG May contracts, expiring April [Member]
Number of Contracts	55		99
Unrealized Gain (Loss) on Open Commodity Contracts	34,850		111,460
% of Partners' Capital	0.13%		0.26%
Open Futures Contracts, Long [Member] | United State [Member] | NYMEX Natural Gas Futures NG June contracts, expiring May [Member]
Number of Contracts	54		100
Unrealized Gain (Loss) on Open Commodity Contracts	19,540		(55,630)
% of Partners' Capital	0.07%		(0.13%)
Open Futures Contracts, Long [Member] | United State [Member] | NYMEX Natural Gas Futures NG July contracts, expiring June [Member]
Number of Contracts	55		100
Unrealized Gain (Loss) on Open Commodity Contracts	84,390		191,530
% of Partners' Capital	0.31%		0.45%
Open Futures Contracts, Long [Member] | United State [Member] | NYMEX Natural Gas Futures NG August contracts, expiring July [Member]
Number of Contracts	55		100
Unrealized Gain (Loss) on Open Commodity Contracts	101,750		(61,640)
% of Partners' Capital	0.37%		(0.14%)
Open Futures Contracts, Long [Member] | United State [Member] | NYMEX Natural Gas Futures NG September contracts, expiring August [Member]
Number of Contracts	55		100
Unrealized Gain (Loss) on Open Commodity Contracts	198,780		46,640
% of Partners' Capital	0.72%		0.11%
Open Futures Contracts, Long [Member] | United State [Member] | NYMEX Natural Gas Futures NG October contracts, expiring September [Member]
Number of Contracts	54		100
Unrealized Gain (Loss) on Open Commodity Contracts	120,580		(90,560)
% of Partners' Capital	0.44%		(0.21%)
Open Futures Contracts, Long [Member] | United State [Member] | NYMEX Natural Gas Futures NG November contracts, expiring October [Member]
Number of Contracts	55		100
Unrealized Gain (Loss) on Open Commodity Contracts	55,320		(334,130)
% of Partners' Capital	0.20%		(0.78%)
Open Futures Contracts, Long [Member] | United State [Member] | NYMEX Natural Gas Futures NG December contracts, expiring November [Member]
Number of Contracts	55		99
Unrealized Gain (Loss) on Open Commodity Contracts	194,730		(334,500)
% of Partners' Capital	0.71%		(0.78%)
Open Futures Contracts, Long [Member] | United State [Member] | NYMEX Natural Gas Futures NG January contracts, expiring December [Member]
Number of Contracts	55		100
Unrealized Gain (Loss) on Open Commodity Contracts	$ (25,140)		$ 24,560
% of Partners' Capital	(0.09%)		0.06%

[1] Collateral amounted to $949,087 on open futures contracts.

[2] Collateral amounted to $4,416,163 on open futures contracts.