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Condensed Schedule of Investments (USD $)	Mar. 31, 2013
Cash Equivalents [Member]
% of Partners' Capital	60.53%
Market Values	$ 27,715,581
Cash Equivalents [Member] | US Treasury Securities [Member] | U.S. Treasury Bill [Member]
% of Partners' Capital	3.71%
Principal Amount	1,700,000
Market Values	1,699,791
Cash Equivalents [Member] | United States [Member] | Money Market Funds [Member]
% of Partners' Capital	56.82%
Market Values	26,015,790
Cash Equivalents [Member] | United States [Member] | Money Market Funds [Member] | Fidelity Institutional Government Portfolio - Class I [Member]
% of Partners' Capital	1.10%
Principal Amount	502,749
Market Values	502,749
Cash Equivalents [Member] | United States [Member] | Money Market Funds [Member] | Goldman Sachs Financial Square Funds - Government Fund - Class FS [Member]
% of Partners' Capital	8.74%
Principal Amount	4,002,270
Market Values	4,002,270
Cash Equivalents [Member] | United States [Member] | Money Market Funds [Member] | Morgan Stanley Institutional Liquidity Fund - Government Portfolio [Member]
% of Partners' Capital	25.14%
Principal Amount	11,510,274
Market Values	11,510,274
Cash Equivalents [Member] | United States [Member] | Money Market Funds [Member] | Wells Fargo Advantage Government Money Market Fund - Class I [Member]
% of Partners' Capital	21.84%
Principal Amount	10,000,497
Market Values	10,000,497
Open Futures Contracts - Long [Member] | United States [Member] | ICE Brent Crude Oil Futures CO May 2013 contracts, expiring April 2013 [Member]
Number of Contracts	416
Unrealized Gain Loss On Open Commodity Contracts	$ 77,060
% of Partners' Capital	0.17%

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