Derivative Instruments (Details 5) (USD $)	Jun. 30, 2013	Dec. 31, 2012
Derivatives Assets and Collateral Received by Counterparty
Net amount of Unrealized Gain Presented in the Consolidated Statement of Financial Condition	$ 4,543,985	$ 3,681,219
Gross Amounts Not Offset in the Consolidated Statement of Financial Condition, Net Amount	4,543,985	3,681,219
Bank of America N.A.
Derivatives Assets and Collateral Received by Counterparty
Net amount of Unrealized Gain Presented in the Consolidated Statement of Financial Condition	169,273	1,327,621
Gross Amounts Not Offset in the Consolidated Statement of Financial Condition, Net Amount	169,273	1,327,621
Deutsche Bank AG
Derivatives Assets and Collateral Received by Counterparty
Net amount of Unrealized Gain Presented in the Consolidated Statement of Financial Condition	(90,004)	(178,677)
Gross Amounts Not Offset in the Consolidated Statement of Financial Condition, Net Amount	(90,004)	(178,677)
Jefferies Bache, LLC
Derivatives Assets and Collateral Received by Counterparty
Net amount of Unrealized Gain Presented in the Consolidated Statement of Financial Condition	116,301	724,791
Gross Amounts Not Offset in the Consolidated Statement of Financial Condition, Net Amount	116,301	724,791
Newedge USA, LLC
Derivatives Assets and Collateral Received by Counterparty
Net amount of Unrealized Gain Presented in the Consolidated Statement of Financial Condition	1,106,192	1,098,091
Gross Amounts Not Offset in the Consolidated Statement of Financial Condition, Net Amount	1,106,192	1,098,091
R.J. O'Brien & Associates, LLC
Derivatives Assets and Collateral Received by Counterparty
Net amount of Unrealized Gain Presented in the Consolidated Statement of Financial Condition	834,300	1,714,310
Gross Amounts Not Offset in the Consolidated Statement of Financial Condition, Net Amount	834,300	1,714,310
UBS Securities LLC
Derivatives Assets and Collateral Received by Counterparty
Net amount of Unrealized Gain Presented in the Consolidated Statement of Financial Condition	2,407,923	(1,004,917)
Gross Amounts Not Offset in the Consolidated Statement of Financial Condition, Net Amount	$ 2,407,923	$ (1,004,917)