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)	$ (4,071,944)	$ (4,882,645)	$ (7,624,743)
Net income (loss)	1,846,114	(5,045,645)	$ 6,374,655
MB Master Fund L.P. [Member]
Investment Holdings [Line Items]
Net Investment Income (Loss)	52,415	(523,086)
Total Trading Results	(951,117)	(106,303)
Net income (loss)	(898,702)	$ (629,389)
CMF Harbour Square Master Fund LLC [Member]
Investment Holdings [Line Items]
Net Investment Income (Loss)	244,803
Total Trading Results	416,882
Net income (loss)	$ 661,685