Derivatives and Hedging - Schedule of Effect of Trading Activities on Statement of Financial Condition (Detail)	3 Months Ended		6 Months Ended
	Jun. 30, 2015 USD ($) Contracts	Jun. 30, 2014 USD ($)	Jun. 30, 2015 USD ($) Contracts	Jun. 30, 2014 USD ($)	Dec. 31, 2014 USD ($) Contracts
Derivative [Line Items]
Net Fair Value	$ 11,964,197		$ 11,964,197		$ (1,107,556)
Unrealized currency gain/(loss)	(2,390,628)		(2,390,628)		(2,400,799)
Total net unrealized loss on open contracts	(3,005,568)		(3,005,568)		(1,107,556)
Unrealized currency gain/(loss)	25,325	$ (1,527)	10,171	$ 1,313
Total	(3,651,282)	1,490,055	(1,025,314)	(1,795,272)
Net realized	(2,093,048)	1,054,346	872,698	(1,471,275)
Net change in unrealized	(1,558,234)	435,709	(1,898,012)	(323,997)
Total Trading Results	(3,651,282)	1,490,055	(1,025,314)	(1,795,272)
Commodity [Member]
Derivative [Line Items]
Total	(1,691,273)	(52,928)	(1,581,164)	(1,354,303)
Equity [Member]
Derivative [Line Items]
Total	(374,318)	807,167	386,844	(821,672)
Foreign Exchange [Member]
Derivative [Line Items]
Total	(441,891)	(148,898)	376,728	(661,898)
Interest Rate [Member]
Derivative [Line Items]
Total	(1,169,125)	$ 886,241	(217,893)	$ 1,041,288
Future Contracts [Member]
Derivative [Line Items]
Net Fair Value	(614,940)		(614,940)		1,293,243
Future Contracts [Member] | Commodity [Member]
Derivative [Line Items]
Net Fair Value	$ (272,728)		$ (272,728)		$ 152,349
Average number of contracts outstanding | Contracts	749		749		848
Future Contracts [Member] | Equity [Member]
Derivative [Line Items]
Net Fair Value	$ (60,102)		$ (60,102)		$ 4,149
Average number of contracts outstanding | Contracts	235		235		309
Future Contracts [Member] | Foreign Exchange [Member]
Derivative [Line Items]
Net Fair Value	$ (256,853)		$ (256,853)		$ 518,669
Average number of contracts outstanding | Contracts	289		289		429
Future Contracts [Member] | Interest Rate [Member]
Derivative [Line Items]
Net Fair Value	$ (25,257)		$ (25,257)		$ 618,076
Average number of contracts outstanding | Contracts	660		660		977
Future Contracts [Member] | Long [Member]
Derivative [Line Items]
Unrealized Gain	$ 330,878		$ 330,878		$ 751,668
Unrealized Loss	(927,672)		(927,672)		(958,824)
Future Contracts [Member] | Long [Member] | Commodity [Member]
Derivative [Line Items]
Unrealized Gain	61,001		61,001		3,667
Unrealized Loss	(301,832)		(301,832)		(117,406)
Future Contracts [Member] | Long [Member] | Equity [Member]
Derivative [Line Items]
Unrealized Gain	1,271		1,271		53,954
Unrealized Loss	(88,337)		(88,337)		(46,233)
Future Contracts [Member] | Long [Member] | Foreign Exchange [Member]
Derivative [Line Items]
Unrealized Gain	210,820		210,820		68,076
Unrealized Loss	(527,336)		(527,336)		(785,527)
Future Contracts [Member] | Long [Member] | Interest Rate [Member]
Derivative [Line Items]
Unrealized Gain	57,786		57,786		625,971
Unrealized Loss	(10,167)		(10,167)		(9,658)
Future Contracts [Member] | Short [Member]
Derivative [Line Items]
Unrealized Gain	980,092		980,092		1,657,678
Unrealized Loss	(998,238)		(998,238)		(157,279)
Future Contracts [Member] | Short [Member] | Commodity [Member]
Derivative [Line Items]
Unrealized Gain	354,203		354,203		290,455
Unrealized Loss	(386,100)		(386,100)		(24,367)
Future Contracts [Member] | Short [Member] | Equity [Member]
Derivative [Line Items]
Unrealized Gain	56,729		56,729		689
Unrealized Loss	(29,765)		(29,765)		(4,261)
Future Contracts [Member] | Short [Member] | Foreign Exchange [Member]
Derivative [Line Items]
Unrealized Gain	566,885		566,885		1,356,424
Unrealized Loss	(507,222)		(507,222)		(120,304)
Future Contracts [Member] | Short [Member] | Interest Rate [Member]
Derivative [Line Items]
Unrealized Gain	2,275		2,275		10,110
Unrealized Loss	$ (75,151)		$ (75,151)		$ (8,347)