Consolidated Statements of Changes in Members' Capital - USD ($)	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Members' capital, beginning balance	$ 63,499,240	$ 76,385,327
Subscriptions	599,000	8,426,500
Redemptions	(24,170,184)	(20,417,026)
Net loss	(2,746,591)	(895,561)
Members' capital, ending balance	37,181,465	63,499,240
Class 0 Units [Member]
Members' capital, beginning balance	$ 46,912,306	$ 57,571,360
Members' capital, beginning balance (in units)	319,296.990	390,743.099
Subscriptions	$ 309,000	$ 7,815,000
Subscriptions (in units)	2,144.439	56,081.486
Redemptions	$ (22,152,384)	$ (18,057,875)
Redemptions (in units)	(157,047.890)	(127,527.595)
Net loss	$ (1,905,247)	$ (416,179)
Members' capital, ending balance	$ 23,163,675	$ 46,912,306
Members' capital, ending balance (in units)	164,393.539	319,296.990
Class 2 Units [Member]
Members' capital, beginning balance	$ 16,586,934	$ 18,813,967
Members' capital, beginning balance (in units)	154,401.114	171,170.918
Subscriptions	$ 290,000	$ 611,500
Subscriptions (in units)	2,818.715	5,700.388
Redemptions	$ (2,017,800)	$ (2,359,151)
Redemptions (in units)	(19,707.500)	(22,470.192)
Net loss	$ (841,344)	$ (479,382)
Members' capital, ending balance	$ 14,017,790	$ 16,586,934
Members' capital, ending balance (in units)	137,512.329	154,401.114