Derivative Instruments - Offsetting of Derivative Assets (Details) - USD ($)	Sep. 30, 2017	Dec. 31, 2016
Offsetting of Derivative Assets
Gross Amount of Recognized Assets	$ 6,278,494	$ 6,127,320
Gross Amounts Offset in the Consolidated Statement of Financial Condition	(6,633,079)	(4,581,389)
Net Amount of Unrealized Gain Presented in the Consolidated Statement of Financial Condition		1,545,931
Net Amount of Unrealized Gain Presented in the Consolidated Statement of Financial Condition	(354,585)
Futures Contracts
Offsetting of Derivative Assets
Gross Amount of Recognized Assets	4,018,670	5,166,127
Gross Amounts Offset in the Consolidated Statement of Financial Condition	(3,721,417)	(2,886,203)
Net Amount of Unrealized Gain Presented in the Consolidated Statement of Financial Condition	297,253	2,279,924
Forward Contracts
Offsetting of Derivative Assets
Gross Amount of Recognized Assets	426,813	556,627
Gross Amounts Offset in the Consolidated Statement of Financial Condition	(941,210)	(555,922)
Net Amount of Unrealized Gain Presented in the Consolidated Statement of Financial Condition		705
Net Amount of Unrealized Gain Presented in the Consolidated Statement of Financial Condition	(514,397)
Swap Contracts
Offsetting of Derivative Assets
Gross Amount of Recognized Assets	1,833,011	404,566
Gross Amounts Offset in the Consolidated Statement of Financial Condition	(1,970,452)	(1,139,264)
Net Amount of Unrealized Gain Presented in the Consolidated Statement of Financial Condition	$ (137,441)	$ (734,698)