Consolidated Statements of Changes in Members' Capital (Unaudited) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Members' capital, beginning balance			$ 63,499,240	$ 76,385,327
Subscriptions			449,000	781,500
Redemptions			(10,130,783)	(5,325,153)
Net loss	$ (2,486,765)	$ 403,353	(3,731,063)	(1,520,080)
Members' capital, ending balance	50,086,394	70,321,594	50,086,394	70,321,594
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	$ 490,000
Subscriptions (in units)			2,144.439	3,369.474
Redemptions			$ (9,130,653)	$ (4,926,886)
Redemptions (in units)			(64,024.431)	(34,461.696)
Net loss			$ (2,620,281)	$ (1,023,755)
Members' capital, ending balance	$ 35,470,372	$ 52,110,719	$ 35,470,372	$ 52,110,719
Members' capital, ending balance (in units)	257,416.998	359,650.877	257,416.998	359,650.877
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			$ 140,000	$ 291,500
Subscriptions (in units)			1,354.166	2,696.511
Redemptions			$ (1,000,130)	$ (398,267)
Redemptions (in units)			(9,692.305)	(3,698.040)
Net loss			$ (1,110,782)	$ (496,325)
Members' capital, ending balance	$ 14,616,022	$ 18,210,875	$ 14,616,022	$ 18,210,875
Members' capital, ending balance (in units)	146,062.975	170,169.389	146,062.975	170,169.389