Consolidated Statements of Unitholders' Capital (USD $)	3 Months Ended	9 Months Ended
	Sep. 30, 2013	Sep. 30, 2013
Balances at December 31, 2012		$ 23,250,458
Income (loss)	(626,130)	(1,946,391)
Balances at September 30, 2013	16,524,920	16,524,920
Beneficial Owners -Trading Class A [Member] | Limited Partner [Member]
Balances at December 31, 2012		21,106,894
Balances at December 31, 2012 (in Shares)		274,403
Income (loss)		(1,844,515)
Transfer from Class A to B		(1,832)
Transfer from Class A to B (in Shares)		(24)
Unitholders' redemptions		(4,582,250)
Unitholders' redemptions (in Shares)		(63,151)
Balances at September 30, 2013	14,678,297	14,678,297
Balances at September 30, 2013 (in Shares)	211,228	211,228
Beneficial Owners - Trading Class B [Member] | Limited Partner [Member]
Balances at December 31, 2012		675,323
Balances at December 31, 2012 (in Shares)		8,103
Income (loss)		(42,902)
Transfer from Class A to B		1,832
Transfer from Class A to B (in Shares)		22
Unitholders' redemptions		(196,897)
Unitholders' redemptions (in Shares)		(2,402)
Balances at September 30, 2013	437,356	437,356
Balances at September 30, 2013 (in Shares)	5,723	5,723
Managing Owners - Trading Class A [Member] | General Partner [Member]
Balances at December 31, 2012		41,153
Balances at December 31, 2012 (in Shares)		535
Income (loss)		(3,975)
Balances at September 30, 2013	37,178	37,178
Balances at September 30, 2013 (in Shares)	535	535
Unitholders' Capital - Trading [Member]
Balances at December 31, 2012		21,823,370
Balances at December 31, 2012 (in Shares)		283,041
Income (loss)		(1,891,392)
Transfer from Class A to B (in Shares)		(2)
Unitholders' redemptions		(4,779,147)
Unitholders' redemptions (in Shares)		(65,553)
Balances at September 30, 2013	15,152,831	15,152,831
Balances at September 30, 2013 (in Shares)	217,486	217,486
Participating Owners - LLC Equity/Non-Trading [Member] | Limited Partner [Member]
Balances at December 31, 2012		149,728
Balances at December 31, 2012 (in Shares)		237,663
Income (loss)		(7,075)
Unitholders' redemptions		(28,960)
Unitholders' redemptions (in Shares)		(49,295)
Balances at September 30, 2013	113,693	113,693
Balances at September 30, 2013 (in Shares)	188,368	188,368
Nonparticipating Owners - LLC Equity/Non-Trading [Member] | Limited Partner [Member]
Balances at December 31, 2012		1,277,360
Balances at December 31, 2012 (in Shares)		2,035,625
Income (loss)		(47,924)
Unitholders' redemptions		28,960
Unitholders' redemptions (in Shares)		49,295
Balances at September 30, 2013	1,258,396	1,258,396
Balances at September 30, 2013 (in Shares)	2,084,920	2,084,920
Unitholders' Capital - LLC Equity/Non-Trading [Member]
Balances at December 31, 2012		1,427,088
Balances at December 31, 2012 (in Shares)		2,273,288
Income (loss)		(54,999)
Balances at September 30, 2013	$ 1,372,089	$ 1,372,089
Balances at September 30, 2013 (in Shares)	2,273,288	2,273,288
Net asset value per unit at December 31, 2012 (in Dollars per share)		$ 0.63
Net change per unit (in Dollars per share)		$ (0.03)
Net asset value per unit at September 30, 2013 (in Dollars per share)	$ 0.60	$ 0.60
Unitholders' Capital - Trading Class A [Member]
Net asset value per unit at December 31, 2012 (in Dollars per share)		$ 76.92
Net change per unit (in Dollars per share)		$ (7.43)
Net asset value per unit at September 30, 2013 (in Dollars per share)	$ 69.49	$ 69.49
Unitholders' Capital - Trading Class B [Member]
Net asset value per unit at December 31, 2012 (in Dollars per share)		$ 83.34
Net change per unit (in Dollars per share)		$ (6.92)
Net asset value per unit at September 30, 2013 (in Dollars per share)	$ 76.42	$ 76.42