Trading Activities - Gross Fair Values of Derivative Instruments of Futures and Forward Contracts Traded (Detail) (USD $) | Jun. 30, 2014 | Dec. 31, 2013 |
Trading Activity, Gains and Losses, Net [Line Items] | ' | ' |
Total unrealized appreciation on open contracts | $110,499 | ' |
Total options purchased | 806 | 1,278,375 |
Total unrealized depreciation on open contracts | -153,220 | ' |
Total options premium received | -214,499 | -322,350 |
Energy [Member] | ' | ' |
Trading Activity, Gains and Losses, Net [Line Items] | ' | ' |
Total options purchased | 806 | 1,278,375 |
Total options premium received | -214,499 | -322,350 |
Futures Contracts [Member] | ' | ' |
Trading Activity, Gains and Losses, Net [Line Items] | ' | ' |
Net unrealized appreciation (depreciation) on open contracts | -19,181 | 634,229 |
Forward Contracts [Member] | ' | ' |
Trading Activity, Gains and Losses, Net [Line Items] | ' | ' |
Net unrealized appreciation (depreciation) on open contracts | -42,721 | ' |
Derivative Assets [Member] | Futures Contracts [Member] | ' | ' |
Trading Activity, Gains and Losses, Net [Line Items] | ' | ' |
Total unrealized appreciation on open contracts | 304,764 | 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 | 22,901 | 47,952 |
Derivative Assets [Member] | Futures Contracts [Member] | Grains [Member] | ' | ' |
Trading Activity, Gains and Losses, Net [Line Items] | ' | ' |
Total unrealized appreciation on open contracts | 40,049 | 330,270 |
Derivative Assets [Member] | Futures Contracts [Member] | Indices [Member] | ' | ' |
Trading Activity, Gains and Losses, Net [Line Items] | ' | ' |
Total unrealized appreciation on open contracts | 139,274 | 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 | 15,242 | 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 | 46,672 | 6,242 |
Derivative Assets [Member] | Futures Contracts [Member] | Livestock [Member] | ' | ' |
Trading Activity, Gains and Losses, Net [Line Items] | ' | ' |
Total unrealized appreciation on open contracts | 17,666 | 380 |
Derivative Assets [Member] | Futures Contracts [Member] | Metals [Member] | ' | ' |
Trading Activity, Gains and Losses, Net [Line Items] | ' | ' |
Total unrealized appreciation on open contracts | 1,000 | 54,812 |
Derivative Assets [Member] | Futures Contracts [Member] | Softs [Member] | ' | ' |
Trading Activity, Gains and Losses, Net [Line Items] | ' | ' |
Total unrealized appreciation on open contracts | 20,185 | 129,432 |
Derivative Assets [Member] | Futures Contracts [Member] | Currencies [Member] | ' | ' |
Trading Activity, Gains and Losses, Net [Line Items] | ' | ' |
Total unrealized appreciation on open contracts | 1,775 | ' |
Derivative Assets [Member] | Forward Contracts [Member] | ' | ' |
Trading Activity, Gains and Losses, Net [Line Items] | ' | ' |
Total unrealized appreciation on open contracts | 110,499 | ' |
Derivative Assets [Member] | Forward Contracts [Member] | Currencies [Member] | ' | ' |
Trading Activity, Gains and Losses, Net [Line Items] | ' | ' |
Total unrealized appreciation on open contracts | 110,499 | ' |
Derivative Liabilities [Member] | Futures Contracts [Member] | ' | ' |
Trading Activity, Gains and Losses, Net [Line Items] | ' | ' |
Total unrealized depreciation on open contracts | -323,945 | -797,904 |
Derivative Liabilities [Member] | Futures Contracts [Member] | Energy [Member] | ' | ' |
Trading Activity, Gains and Losses, Net [Line Items] | ' | ' |
Total unrealized depreciation on open contracts | -23,047 | -24,919 |
Derivative Liabilities [Member] | Futures Contracts [Member] | Grains [Member] | ' | ' |
Trading Activity, Gains and Losses, Net [Line Items] | ' | ' |
Total unrealized depreciation on open contracts | -62,056 | -62,987 |
Derivative Liabilities [Member] | Futures Contracts [Member] | Indices [Member] | ' | ' |
Trading Activity, Gains and Losses, Net [Line Items] | ' | ' |
Total unrealized depreciation on open contracts | -122,954 | -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 | -48,268 | -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 | -219 | -201,662 |
Derivative Liabilities [Member] | Futures Contracts [Member] | Livestock [Member] | ' | ' |
Trading Activity, Gains and Losses, Net [Line Items] | ' | ' |
Total unrealized depreciation on open contracts | -3,400 | -4,050 |
Derivative Liabilities [Member] | Futures Contracts [Member] | Metals [Member] | ' | ' |
Trading Activity, Gains and Losses, Net [Line Items] | ' | ' |
Total unrealized depreciation on open contracts | -49,307 | -2,430 |
Derivative Liabilities [Member] | Futures Contracts [Member] | Softs [Member] | ' | ' |
Trading Activity, Gains and Losses, Net [Line Items] | ' | ' |
Total unrealized depreciation on open contracts | -14,694 | -10,484 |
Derivative Liabilities [Member] | Forward Contracts [Member] | ' | ' |
Trading Activity, Gains and Losses, Net [Line Items] | ' | ' |
Total unrealized depreciation on open contracts | -153,220 | ' |
Derivative Liabilities [Member] | Forward Contracts [Member] | Currencies [Member] | ' | ' |
Trading Activity, Gains and Losses, Net [Line Items] | ' | ' |
Total unrealized depreciation on open contracts | ($153,220) | ' |