Consolidated Statements of Changes in Members' Capital (Unaudited) - USD ($)	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Members' capital, beginning balance	$ 37,181,465	$ 63,499,240
Subscriptions	0	309,000
Redemptions	(1,028,376)	(7,200,473)
Net income (loss)	612,464	(1,244,298)
Members' capital, ending balance	36,765,553	55,363,469
Class 0 Units [Member]
Members' capital, beginning balance	$ 23,163,675	$ 46,912,306
Members' capital, beginning balance (in units)	164,393.539	319,296.990
Subscriptions	$ 0	$ 309,000
Subscriptions (in units)	0	2,144.439
Redemptions	$ (603,688)	$ (6,737,309)
Redemptions (in units)	(4,139.796)	(47,035.243)
Net income (loss)	$ 394,780	$ (873,331)
Members' capital, ending balance	$ 22,954,767	$ 39,610,666
Members' capital, ending balance (in units)	160,253.743	274,406.186
Class 2 Units [Member]
Members' capital, beginning balance	$ 14,017,790	$ 16,586,934
Members' capital, beginning balance (in units)	137,512.329	154,401.114
Subscriptions	$ 0	$ 0
Subscriptions (in units)	0	0
Redemptions	$ (424,688)	$ (463,164)
Redemptions (in units)	(3,993.281)	(4,410.591)
Net income (loss)	$ 217,684	$ (370,967)
Members' capital, ending balance	$ 13,810,786	$ 15,752,803
Members' capital, ending balance (in units)	133,519.048	149,990.523