Investment in the Funds - Assets, Liabilities and Partners'/Members' Capital of Funds (Detail) - USD ($)	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Investment Holdings [Line Items]
Total Assets	$ 139,345,703	$ 94,885,971
Total Liabilities	5,327,483	3,034,282
Total Capital	134,018,220	91,851,689	$ 136,664,864	$ 206,869,254
CMF Willowbridge Master Fund L.P. [Member]
Investment Holdings [Line Items]
Total Assets		336,101,673
Total Liabilities		39,096,772
Total Capital		297,004,901
CMF Aspect Master Fund L.P. [Member]
Investment Holdings [Line Items]
Total Assets		31,265,102
Total Liabilities		16,568,191
Total Capital		14,696,911
CMF Graham Capital Master Fund L.P. [Member]
Investment Holdings [Line Items]
Total Assets		17,461,265
Total Liabilities		11,507,153
Total Capital		5,954,112
CMF Boronia I LLC [Member]
Investment Holdings [Line Items]
Total Assets		20,339,272
Total Liabilities		20,339,272
Cambridge Master Fund L.P. [Member]
Investment Holdings [Line Items]
Total Assets	21,433,817	31,063,463
Total Liabilities	4,151,814	4,384,639
Total Capital	17,282,003	$ 26,678,824
SECOR Alpha Master Fund L.P. [Member]
Investment Holdings [Line Items]
Total Assets	37,347,676
Total Liabilities	2,170,539
Total Capital	35,177,137
CMF FORT Contrarian Master Fund LLC [Member]
Investment Holdings [Line Items]
Total Assets	180,042,210
Total Liabilities	1,648,773
Total Capital	178,393,437
CMF AE Capital Master Fund LLC [Member]
Investment Holdings [Line Items]
Total Assets	19,758,302
Total Liabilities	99,954
Total Capital	$ 19,658,348