Consolidated Statements of Changes in Members' Capital (Unaudited) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Members' capital, beginning balance			$ 37,181,465	$ 63,499,240
Subscriptions			0	449,000
Redemptions			(3,102,807)	(14,611,736)
Net income (loss)	$ 225,680	$ 356,679	268,408	(3,374,384)
Members' capital, ending balance	34,347,066	45,962,120	34,347,066	45,962,120
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			$ (1,663,411)	$ (13,210,653)
Redemptions (in units)			(11,644.404)	(93,329.320)
Net income (loss)			$ 209,469	$ (2,346,475)
Members' capital, ending balance	$ 21,709,733	$ 31,664,178	$ 21,709,733	$ 31,664,178
Members' capital, ending balance (in units)	152,749.135	228,112.109	152,749.135	228,112.109
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			$ (1,439,396)	$ (1,401,083)
Redemptions (in units)			(13,915.987)	(13,648.188)
Net income (loss)			$ 58,939	$ (1,027,909)
Members' capital, ending balance	$ 12,637,333	$ 14,297,942	$ 12,637,333	$ 14,297,942
Members' capital, ending balance (in units)	123,596.342	142,107.092	123,596.342	142,107.092