Investment in the Funds - Net Investment Income (Loss), Trading Results and Net Income (Loss) for Funds (Detail) - USD ($)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Investment Holdings [Line Items]
Net Investment Income (Loss)	$ (22,373,870)	$ (31,400,195)	$ (41,135,128)
Total trading results	(48,172,549)	(1,840,380)	35,131,599
Net income (loss)	(70,546,419)	(33,240,575)	$ (6,003,529)
CMF Winton Master L.P. [Member]
Investment Holdings [Line Items]
Net Investment Income (Loss)	5,588,690	2,498,543
Total trading results	(7,829,505)	41,177,241
Net income (loss)	(2,240,815)	43,675,784
CMF TT II, LLC [Member]
Investment Holdings [Line Items]
Net Investment Income (Loss)	(299,102)	(2,170,265)
Total trading results	(17,683,526)	(2,700,598)
Net income (loss)	(17,982,628)	(4,870,863)
CMF Willowbridge Master Fund L.P.[Member]
Investment Holdings [Line Items]
Net Investment Income (Loss)	906,473	1,244,821
Total trading results	(4,843,521)	(27,512,190)
Net income (loss)	(3,937,048)	$ (26,267,369)
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)