Derivatives and Hedging - Schedule of Effect of Trading Activities on the Statements of Income and Expenses (Detail) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Derivative [Line Items]
Trading results	$ 1,026,391	$ 3,426,527	$ 1,077	$ 1,631,255
Net realized	(2,322,317)	2,215,029	(1,449,619)	743,754
Net change in unrealized	3,348,708	1,211,498	1,450,696	887,501
Total Trading Results	1,026,391	3,426,527	1,077	1,631,255
Commodity [Member]
Derivative [Line Items]
Trading results	915,609	1,088,449	(665,555)	(265,854)
Equity [Member]
Derivative [Line Items]
Trading results	(275,220)	72,377	111,624	(749,295)
Foreign Currency [Member]
Derivative [Line Items]
Trading results	492,855	1,751,536	879,754	1,090,951
Interest Rate [Member]
Derivative [Line Items]
Trading results	$ (106,853)	$ 514,165	$ (324,746)	$ 1,555,453