Trading Activities - Gross Fair Values of Derivative Instruments of Futures and Forward Contracts Traded (Detail) (USD $) | Mar. 31, 2014 | Dec. 31, 2013 |
Trading Activity, Gains and Losses, Net [Line Items] | ' | ' |
Total unrealized appreciation on open contracts | $656,084 | ' |
Total options purchased | 631,865 | 1,278,375 |
Total unrealized depreciation on open contracts | -305,266 | ' |
Total options premium received | -858,774 | -322,350 |
Energy [Member] | ' | ' |
Trading Activity, Gains and Losses, Net [Line Items] | ' | ' |
Total options purchased | 631,865 | 1,278,375 |
Total options premium received | -858,774 | -322,350 |
Futures Contracts [Member] | ' | ' |
Trading Activity, Gains and Losses, Net [Line Items] | ' | ' |
Net unrealized appreciation (depreciation) on open contracts | 307,971 | 634,229 |
Forward Contracts [Member] | ' | ' |
Trading Activity, Gains and Losses, Net [Line Items] | ' | ' |
Net unrealized appreciation (depreciation) on open contracts | 350,818 | ' |
Derivative Assets [Member] | Futures Contracts [Member] | ' | ' |
Trading Activity, Gains and Losses, Net [Line Items] | ' | ' |
Total unrealized appreciation on open contracts | 539,891 | 1,432,133 |
Derivative Assets [Member] | Futures Contracts [Member] | Energy [Member] | ' | ' |
Trading Activity, Gains and Losses, Net [Line Items] | ' | ' |
Total unrealized appreciation on open contracts | 9,966 | 47,952 |
Derivative Assets [Member] | Futures Contracts [Member] | Grains [Member] | ' | ' |
Trading Activity, Gains and Losses, Net [Line Items] | ' | ' |
Total unrealized appreciation on open contracts | 92,944 | 330,270 |
Derivative Assets [Member] | Futures Contracts [Member] | Indices [Member] | ' | ' |
Trading Activity, Gains and Losses, Net [Line Items] | ' | ' |
Total unrealized appreciation on open contracts | 236,955 | 581,789 |
Derivative Assets [Member] | Futures Contracts [Member] | Interest Rates Non-U.S. [Member] | ' | ' |
Trading Activity, Gains and Losses, Net [Line Items] | ' | ' |
Total unrealized appreciation on open contracts | 85,935 | 281,256 |
Derivative Assets [Member] | Futures Contracts [Member] | Interest Rates U.S. [Member] | ' | ' |
Trading Activity, Gains and Losses, Net [Line Items] | ' | ' |
Total unrealized appreciation on open contracts | 3,547 | 6,242 |
Derivative Assets [Member] | Futures Contracts [Member] | Livestock [Member] | ' | ' |
Trading Activity, Gains and Losses, Net [Line Items] | ' | ' |
Total unrealized appreciation on open contracts | 9,230 | 380 |
Derivative Assets [Member] | Futures Contracts [Member] | Metals [Member] | ' | ' |
Trading Activity, Gains and Losses, Net [Line Items] | ' | ' |
Total unrealized appreciation on open contracts | 82,903 | 54,812 |
Derivative Assets [Member] | Futures Contracts [Member] | Softs [Member] | ' | ' |
Trading Activity, Gains and Losses, Net [Line Items] | ' | ' |
Total unrealized appreciation on open contracts | 18,411 | 129,432 |
Derivative Assets [Member] | Forward Contracts [Member] | ' | ' |
Trading Activity, Gains and Losses, Net [Line Items] | ' | ' |
Total unrealized appreciation on open contracts | 656,084 | ' |
Derivative Assets [Member] | Forward Contracts [Member] | Currencies [Member] | ' | ' |
Trading Activity, Gains and Losses, Net [Line Items] | ' | ' |
Total unrealized appreciation on open contracts | 656,084 | ' |
Derivative Liabilities [Member] | Futures Contracts [Member] | ' | ' |
Trading Activity, Gains and Losses, Net [Line Items] | ' | ' |
Total unrealized depreciation on open contracts | -231,920 | -797,904 |
Derivative Liabilities [Member] | Futures Contracts [Member] | Energy [Member] | ' | ' |
Trading Activity, Gains and Losses, Net [Line Items] | ' | ' |
Total unrealized depreciation on open contracts | -23,825 | -24,919 |
Derivative Liabilities [Member] | Futures Contracts [Member] | Grains [Member] | ' | ' |
Trading Activity, Gains and Losses, Net [Line Items] | ' | ' |
Total unrealized depreciation on open contracts | -2,525 | -62,987 |
Derivative Liabilities [Member] | Futures Contracts [Member] | Indices [Member] | ' | ' |
Trading Activity, Gains and Losses, Net [Line Items] | ' | ' |
Total unrealized depreciation on open contracts | -64,894 | -386,784 |
Derivative Liabilities [Member] | Futures Contracts [Member] | Interest Rates Non-U.S. [Member] | ' | ' |
Trading Activity, Gains and Losses, Net [Line Items] | ' | ' |
Total unrealized depreciation on open contracts | -33,238 | -104,588 |
Derivative Liabilities [Member] | Futures Contracts [Member] | Interest Rates U.S. [Member] | ' | ' |
Trading Activity, Gains and Losses, Net [Line Items] | ' | ' |
Total unrealized depreciation on open contracts | -62,985 | -201,662 |
Derivative Liabilities [Member] | Futures Contracts [Member] | Livestock [Member] | ' | ' |
Trading Activity, Gains and Losses, Net [Line Items] | ' | ' |
Total unrealized depreciation on open contracts | -4,370 | -4,050 |
Derivative Liabilities [Member] | Futures Contracts [Member] | Metals [Member] | ' | ' |
Trading Activity, Gains and Losses, Net [Line Items] | ' | ' |
Total unrealized depreciation on open contracts | -13,985 | -2,430 |
Derivative Liabilities [Member] | Futures Contracts [Member] | Softs [Member] | ' | ' |
Trading Activity, Gains and Losses, Net [Line Items] | ' | ' |
Total unrealized depreciation on open contracts | -26,098 | -10,484 |
Derivative Liabilities [Member] | Forward Contracts [Member] | ' | ' |
Trading Activity, Gains and Losses, Net [Line Items] | ' | ' |
Total unrealized depreciation on open contracts | -305,266 | ' |
Derivative Liabilities [Member] | Forward Contracts [Member] | Energy [Member] | ' | ' |
Trading Activity, Gains and Losses, Net [Line Items] | ' | ' |
Total unrealized depreciation on open contracts | ($305,266) | ' |