Consolidated Statements of Changes in Members' Capital (Unaudited) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Members' capital, beginning balance			$ 37,181,465	$ 63,499,240
Subscriptions			0	449,000
Redemptions			(2,179,431)	(10,130,783)
Net income (loss)	$ (569,736)	$ (2,486,765)	42,728	(3,731,063)
Members' capital, ending balance	35,044,762	50,086,394	35,044,762	50,086,394
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			$ (930,197)	$ (9,130,653)
Redemptions (in units)			(6,430.240)	(64,024.431)
Net income (loss)			$ 52,587	$ (2,620,281)
Members' capital, ending balance	$ 22,286,065	$ 35,470,372	$ 22,286,065	$ 35,470,372
Members' capital, ending balance (in units)	157,963.299	257,416.998	157,963.299	257,416.998
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	$ 140,000
Subscriptions (in units)			0	1,354.166
Redemptions			$ (1,249,234)	$ (1,000,130)
Redemptions (in units)			(12,044.502)	(9,692.305)
Net income (loss)			$ (9,859)	$ (1,110,782)
Members' capital, ending balance	$ 12,758,697	$ 14,616,022	$ 12,758,697	$ 14,616,022
Members' capital, ending balance (in units)	125,467.827	146,062.975	125,467.827	146,062.975