Consolidated Statements of Changes in Members' Capital (Unaudited) - USD ($)	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Members' capital, beginning balance	$ 27,978,759	$ 37,181,465
Subscriptions	323,500	0
Redemptions	(1,257,799)	(1,028,376)
Net income (loss)	(24,459)	612,464
Members' capital, ending balance	27,020,001	36,765,553
Class 0 Units [Member]
Members' capital, beginning balance	$ 16,801,362	$ 23,163,675
Members' capital, beginning balance (in units)	125,660.811	164,393.539
Subscriptions	$ 250,000	$ 0
Subscriptions (in units)	1,882.369	0
Redemptions	$ (563,529)	$ (603,688)
Redemptions (in units)	(4,231.016)	(4,139.796)
Net income (loss)	$ (1,083)	$ 394,780
Members' capital, ending balance	$ 16,486,750	$ 22,954,767
Members' capital, ending balance (in units)	123,312.164	160,253.743
Class 2 Units [Member]
Members' capital, beginning balance	$ 11,177,397	$ 14,017,790
Members' capital, beginning balance (in units)	116,424.562	137,512.329
Subscriptions	$ 73,500	$ 0
Subscriptions (in units)	775.525	0
Redemptions	$ (694,270)	$ (424,688)
Redemptions (in units)	(7,277.581)	(3,993.281)
Net income (loss)	$ (23,376)	$ 217,684
Members' capital, ending balance	$ 10,533,251	$ 13,810,786
Members' capital, ending balance (in units)	109,922.506	133,519.048