Investment in the Funds - Assets, Liabilities and Capital of Funds (Detail) - USD ($)	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Investment Holdings [Line Items]
Total Assets	$ 32,635,565	$ 44,270,612
Total Liabilities	2,776,892	2,528,000
Total Partners' Capital	29,858,673	41,742,612	$ 63,890,718	$ 94,328,641
SECOR Master Fund L.P. [Member]
Investment Holdings [Line Items]
Total Assets	37,347,676	22,831,484
Total Liabilities	2,170,539	18,066,303
Total Partners' Capital	35,177,137	4,765,181
CMF Harbour Square Master Fund LLC [Member]
Investment Holdings [Line Items]
Total Assets	10,504,910
Total Liabilities	2,532,233
Total Partners' Capital	7,972,677
CMF AE Capital Master Fund LLC [Member]
Investment Holdings [Line Items]
Total Assets	19,758,302
Total Liabilities	99,954
Total Partners' Capital	$ 19,658,348
Cambridge Master Fund L.P. [Member]
Investment Holdings [Line Items]
Total Assets		31,063,463
Total Liabilities		4,384,639
Total Partners' Capital		$ 26,678,824