Trading Activities - Summary of Gross and Net Amounts Recognized Relating to Assets and Liabilities of Partnership's Derivatives (Detail) - USD ($)	Jun. 30, 2017	Dec. 31, 2016
Derivative [Line Items]
Gross Amounts Recognized, Assets	$ 2,499,261	$ 3,272,429
Gross Amounts Offset in the Statements of Financial Condition, Assets	(2,499,261)	(1,897,018)
Amounts Presented in the Statements of Financial Condition, Assets		1,375,411
Gross Amounts Not Offset in the Statements of Financial Condition, Financial Instruments, Assets	0	0
Gross Amounts Not Offset in the Statements of Financial Condition, Cash Collateral Received/ Pledged, Assets	0	0
Net Amount, Assets		1,375,411
Gross Amounts Recognized, Liabilities	(4,186,192)	(1,944,889)
Gross Amounts Offset in the Statements of Financial Condition, Liabilities	2,499,261	1,897,018
Amounts Presented in the Statements of Financial Condition, Liabilities	(1,686,931)	(47,871)
Gross Amounts Not Offset in the Statements of Financial Condition, Financial Instruments, Liabilities	0	0
Gross Amounts Not Offset in the Statements of Financial Condition, Cash Collateral Received/ Pledged, Liabilities	0	0
Net Amount, Liabilities	(1,686,931)	(47,871)
Net fair value	(1,686,931)	1,327,540
Futures Contracts [Member]
Derivative [Line Items]
Gross Amounts Recognized, Assets	1,107,221	2,203,401
Gross Amounts Offset in the Statements of Financial Condition, Assets	(1,107,221)	(827,990)
Amounts Presented in the Statements of Financial Condition, Assets		1,375,411
Gross Amounts Not Offset in the Statements of Financial Condition, Financial Instruments, Assets	0	0
Gross Amounts Not Offset in the Statements of Financial Condition, Cash Collateral Received/ Pledged, Assets	0	0
Net Amount, Assets		1,375,411
Gross Amounts Recognized, Liabilities	(2,628,562)	(827,990)
Gross Amounts Offset in the Statements of Financial Condition, Liabilities	1,107,221	827,990
Amounts Presented in the Statements of Financial Condition, Liabilities	(1,521,341)
Gross Amounts Not Offset in the Statements of Financial Condition, Financial Instruments, Liabilities	0	0
Gross Amounts Not Offset in the Statements of Financial Condition, Cash Collateral Received/ Pledged, Liabilities	0	0
Net Amount, Liabilities	(1,521,341)
Forward Contracts [Member]
Derivative [Line Items]
Gross Amounts Recognized, Assets	1,392,040	1,069,028
Gross Amounts Offset in the Statements of Financial Condition, Assets	(1,392,040)	(1,069,028)
Gross Amounts Not Offset in the Statements of Financial Condition, Financial Instruments, Assets	0	0
Gross Amounts Not Offset in the Statements of Financial Condition, Cash Collateral Received/ Pledged, Assets	0	0
Gross Amounts Recognized, Liabilities	(1,557,630)	(1,116,899)
Gross Amounts Offset in the Statements of Financial Condition, Liabilities	1,392,040	1,069,028
Amounts Presented in the Statements of Financial Condition, Liabilities	(165,590)	(47,871)
Gross Amounts Not Offset in the Statements of Financial Condition, Financial Instruments, Liabilities	0	0
Gross Amounts Not Offset in the Statements of Financial Condition, Cash Collateral Received/ Pledged, Liabilities	0	0
Net Amount, Liabilities	$ (165,590)	$ (47,871)