Derivative Instruments - Fair Value of Derivative Instruments (Details) - USD ($)	3 Months Ended	12 Months Ended
	Mar. 31, 2017	Dec. 31, 2016
Fair Values of Derivative Instruments
Asset Derivatives	$ 5,842,471	$ 6,127,320
Liability Derivatives	$ (5,970,229)	$ (4,581,389)
Agriculturals | Deutsche Bank Total Return Swap Terminating March 29, 2019
Fair Values of Derivative Instruments
Sector exposure index	2.00%	3.00%
Energy | Deutsche Bank Total Return Swap Terminating March 29, 2019
Fair Values of Derivative Instruments
Sector exposure index	1.00%	1.00%
Interest rates | Deutsche Bank Total Return Swap Terminating March 29, 2019
Fair Values of Derivative Instruments
Sector exposure index	60.00%	53.00%
Interest rates | Deutsche Bank Total Return Swap Terminating July 1, 2020
Fair Values of Derivative Instruments
Sector exposure index	48.00%	61.00%
Meats | Deutsche Bank Total Return Swap Terminating March 29, 2019
Fair Values of Derivative Instruments
Sector exposure index	1.00%
Metals | Deutsche Bank Total Return Swap Terminating March 29, 2019
Fair Values of Derivative Instruments
Sector exposure index		3.00%
Stock indices | Deutsche Bank Total Return Swap Terminating March 29, 2019
Fair Values of Derivative Instruments
Sector exposure index	18.00%	15.00%
Stock indices | Deutsche Bank Total Return Swap Terminating July 1, 2020
Fair Values of Derivative Instruments
Sector exposure index	11.00%	10.00%
Futures Contracts
Fair Values of Derivative Instruments
Asset Derivatives	$ 4,767,366	$ 5,166,127
Liability Derivatives	(4,136,863)	(2,886,203)
Fair Value	630,503	2,279,924
Futures Contracts | Agriculturals
Fair Values of Derivative Instruments
Asset Derivatives	555,070	121,013
Liability Derivatives	(152,110)	(261,721)
Fair Value	402,960	(140,708)
Futures Contracts | Currencies
Fair Values of Derivative Instruments
Asset Derivatives	414,687	763,565
Liability Derivatives	(652,198)	(345,781)
Fair Value	(237,511)	417,784
Futures Contracts | Energy
Fair Values of Derivative Instruments
Asset Derivatives	142,514	562,341
Liability Derivatives	(936,734)	(18,461)
Fair Value	(794,220)	543,880
Futures Contracts | Interest rates
Fair Values of Derivative Instruments
Asset Derivatives	461,756	578,244
Liability Derivatives	(706,094)	(326,726)
Fair Value	(244,338)	251,518
Futures Contracts | Meats
Fair Values of Derivative Instruments
Asset Derivatives	128,988	79,821
Liability Derivatives	(62,007)	(10,487)
Fair Value	66,981	69,334
Futures Contracts | Metals
Fair Values of Derivative Instruments
Asset Derivatives	1,016,343	1,604,965
Liability Derivatives	(849,019)	(1,282,731)
Fair Value	167,324	322,234
Futures Contracts | Soft commodities
Fair Values of Derivative Instruments
Asset Derivatives	397,194	344,652
Liability Derivatives	(93,163)	(86,579)
Fair Value	304,031	258,073
Futures Contracts | Stock indices
Fair Values of Derivative Instruments
Asset Derivatives	1,650,814	1,111,526
Liability Derivatives	(685,538)	(553,717)
Fair Value	965,276	557,809
Forward Contracts
Fair Values of Derivative Instruments
Fair Value	(477,797)	705
Forward Contracts | Currencies
Fair Values of Derivative Instruments
Asset Derivatives	482,736	556,627
Liability Derivatives	(960,533)	(555,922)
Fair Value	$ (477,797)	$ 705
Forward Contracts | Currencies | Deutsche Bank Total Return Swap Terminating March 29, 2019
Fair Values of Derivative Instruments
Sector exposure index	18.00%	25.00%
Forward Contracts | Currencies | Deutsche Bank Total Return Swap Terminating July 1, 2020
Fair Values of Derivative Instruments
Sector exposure index	41.00%	29.00%
Swap Contracts
Fair Values of Derivative Instruments
Asset Derivatives	$ 592,369	$ 404,566
Liability Derivatives	(872,833)	(1,139,264)
Fair Value	$ (280,464)	$ (734,698)
Swap Contracts | Deutsche Bank Total Return Swap Terminating March 29, 2019
Fair Values of Derivative Instruments
Sector exposure index	100.00%	100.00%
Swap Contracts | Deutsche Bank Total Return Swap Terminating July 1, 2020
Fair Values of Derivative Instruments
Sector exposure index	100.00%	100.00%