Investment in the Funds - Net Investment Income (Loss), Trading Results and Net Income (Loss) of Funds (Detail) - USD ($)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Investment Holdings [Line Items]
Net Investment Income (Loss)	$ (6,748,640)	$ (5,771,729)	$ (10,177,099)
Total Trading Results	(4,467,297)	(2,481,647)	(7,490,744)
Net income (loss)	(11,215,937)	(8,253,376)	$ (17,667,843)
CMF Willowbridge Master Fund L.P. [Member]
Investment Holdings [Line Items]
Net Investment Income (Loss)		1,244,821
Total Trading Results		(27,512,190)
Net income (loss)		(26,267,369)
CMF Aspect Master Fund L.P. [Member]
Investment Holdings [Line Items]
Net Investment Income (Loss)		86,824
Total Trading Results		237,022
Net income (loss)		323,846
CMF Graham Capital Master Fund L.P. [Member]
Investment Holdings [Line Items]
Net Investment Income (Loss)		17,954
Total Trading Results		1,841,308
Net income (loss)		1,859,262
CMF Boronia I LLC [Member]
Investment Holdings [Line Items]
Net Investment Income (Loss)		(1,350,616)
Total Trading Results		(7,153,817)
Net income (loss)		(8,504,433)
Cambridge Master Fund L.P. [Member]
Investment Holdings [Line Items]
Net Investment Income (Loss)	371,194	141,596
Total Trading Results	(3,386,331)	1,967,437
Net income (loss)	(3,015,137)	$ 2,109,033
SECOR Alpha Master Fund L.P. [Member]
Investment Holdings [Line Items]
Net Investment Income (Loss)	(184,045)
Total Trading Results	8,191,065
Net income (loss)	8,007,020
CMF FORT Contrarian Master Fund LLC [Member]
Investment Holdings [Line Items]
Net Investment Income (Loss)	2,172,289
Total Trading Results	(12,008,806)
Net income (loss)	(9,836,517)
CMF AE Capital Master Fund LLC [Member]
Investment Holdings [Line Items]
Net Investment Income (Loss)	180,229
Total Trading Results	(1,180,663)
Net income (loss)	$ (1,000,434)