Consolidated Statements of Changes in Members' Capital (Unaudited) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Members' capital, beginning balance			$ 63,499,240	$ 76,385,327
Subscriptions			449,000	1,171,500
Redemptions			(14,611,736)	(19,010,109)
Net loss	$ 356,679	$ (2,826,626)	(3,374,384)	(4,346,706)
Members' capital, ending balance	45,962,120	54,200,012	45,962,120	54,200,012
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	$ 590,000
Subscriptions (in units)			2,144.439	4,066.972
Redemptions			$ (13,210,653)	$ (17,859,057)
Redemptions (in units)			(93,329.320)	(126,129.668)
Net loss			$ (2,346,475)	$ (2,995,965)
Members' capital, ending balance	$ 31,664,178	$ 37,306,338	$ 31,664,178	$ 37,306,338
Members' capital, ending balance (in units)	228,112.109	268,680.403	228,112.109	268,680.403
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	$ 581,500
Subscriptions (in units)			1,354.166	5,406.380
Redemptions			$ (1,401,083)	$ (1,151,052)
Redemptions (in units)			(13,648.188)	(11,014.094)
Net loss			$ (1,027,909)	$ (1,350,741)
Members' capital, ending balance	$ 14,297,942	$ 16,893,674	$ 14,297,942	$ 16,893,674
Members' capital, ending balance (in units)	142,107.092	165,563.204	142,107.092	165,563.204