Consolidated Statements of Changes in Members' Capital - USD ($)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Members' capital, beginning balance	$ 37,181,465	$ 63,499,240
Subscriptions	0	599,000
Redemptions	(7,570,182)	(24,170,184)
Net loss	(1,632,524)	(2,746,591)
Members' capital, ending balance	27,978,759	37,181,465
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	$ (5,422,944)	$ (22,152,384)
Redemptions (in units)	(38,732.728)	(157,047.890)
Net loss	$ (939,369)	$ (1,905,247)
Members' capital, ending balance	$ 16,801,362	$ 23,163,675
Members' capital, ending balance (in units)	125,660.811	164,393.539
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	$ 290,000
Subscriptions (in units)	0	2,818.715
Redemptions	$ (2,147,238)	$ (2,017,800)
Redemptions (in units)	(21,087.767)	(19,707.500)
Net loss	$ (693,155)	$ (841,344)
Members' capital, ending balance	$ 11,177,397	$ 14,017,790
Members' capital, ending balance (in units)	116,424.562	137,512.329