Investment in the Funds - Partnership's Investments in, and Partnership's Pro Rata Share of Results of Operations of Funds (Detail) (Detail) - USD ($)		12 Months Ended
		Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Investment Holdings [Line Items]
% of Partners' Capital		35.10%	12.30%
Fair Value	[1]	$ 10,478,871	$ 5,132,400
Income (Loss)		1,559,616	(820,027)	$ 502,983
Expenses, Clearing Fees		169,977	212,968	244,910
Expenses, Professional fees		331,300	420,665	422,957
Net Income (Loss)		$ (235,448)	$ (3,775,361)	$ (4,367,857)
SECOR Master Fund L.P. [Member]
Investment Holdings [Line Items]
% of Partners' Capital		18.00%	11.43%
Fair Value		$ 5,373,355	$ 4,770,275
Cambridge Master Fund L.P. [Member]
Investment Holdings [Line Items]
% of Partners' Capital			0.87%
Fair Value			$ 362,125
CMF Harbour Square Master Fund LLC [Member]
Investment Holdings [Line Items]
% of Partners' Capital		8.39%
Fair Value		$ 2,505,301
CMF AE Capital Master Fund LLC [Member]
Investment Holdings [Line Items]
% of Partners' Capital		8.71%
Fair Value		$ 2,600,215
Investment in Funds [Member]
Investment Holdings [Line Items]
Income (Loss)		1,609,357	484,802
Expenses, Clearing Fees		192,084	182,791
Expenses, Professional fees		53,163	33,136
Net Income (Loss)		1,364,110	268,875
Investment in Funds [Member] | Commodity [Member] | SECOR Master Fund L.P. [Member]
Investment Holdings [Line Items]
Income (Loss)		1,549,537	(374,306)
Expenses, Clearing Fees		121,023	165,557
Expenses, Professional fees		12,908	24,321
Net Income (Loss)		$ 1,415,606	$ (564,184)
Investment Objective		Commodity Portfolio	Commodity Portfolio
Redemptions Permitted		Monthly	Monthly
Investment in Funds [Member] | Commodity [Member] | Cambridge Master Fund L.P. [Member]
Investment Holdings [Line Items]
Income (Loss)		$ (41,066)	$ 870,647
Expenses, Clearing Fees		2,668	16,622
Expenses, Professional fees		1,831	8,753
Net Income (Loss)		$ (45,565)	$ 845,272
Investment Objective		Commodity Portfolio	Commodity Portfolio
Redemptions Permitted		Monthly	Monthly
Investment in Funds [Member] | Commodity [Member] | CMF Willowbridge Master Fund L.P. [Member]
Investment Holdings [Line Items]
Income (Loss)			$ (11,539)
Expenses, Clearing Fees			612
Expenses, Professional fees			62
Net Income (Loss)			$ (12,213)
Investment Objective			Commodity Portfolio
Redemptions Permitted			Monthly
Investment in Funds [Member] | Commodity [Member] | CMF Harbour Square Master Fund LLC [Member]
Investment Holdings [Line Items]
Income (Loss)		$ 275,727
Expenses, Clearing Fees		43,893
Expenses, Professional fees		26,628
Net Income (Loss)		$ 205,206
Investment Objective		Commodity Portfolio
Redemptions Permitted		Monthly
Investment in Funds [Member] | Commodity [Member] | CMF AE Capital Master Fund LLC [Member]
Investment Holdings [Line Items]
Income (Loss)		$ (174,841)
Expenses, Clearing Fees		24,500
Expenses, Professional fees		11,796
Net Income (Loss)		$ (211,137)
Investment Objective		Commodity Portfolio
Redemptions Permitted		Monthly

[1] Defined in Note 1.