Consolidated Statement of Changes in Unitholders' Capital (USD $)	3 Months Ended		6 Months Ended		67 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012
Unitholders' contributions (in units)					135,840
Beginning Balances			$ 34,952,207
Net income (loss)	(1,016,146)	(1,850,179)	(2,920,640)	(3,862,292)
Unitholders' contributions					12,457,447
Ending Balances	27,949,657		27,949,657		27,949,657
Trading
Beginning Balances (in units)			369,090
Unitholders' contributions (in units)			1,574
Unitholders' redemptions (in unit)			(48,661)
Ending Balances (in units)	322,003		322,003		322,003
Beginning Balances			33,777,543
Net income (loss)			(2,605,710)
Unitholders' contributions			137,392
Unitholders' redemptions			(4,219,302)
Ending Balances	27,089,923		27,089,923		27,089,923
Trading | Class A
Net Asset Value Per Unit-Beginning Balance			$ 91.32
Net change per unit	$ (2.44)	$ (4.74)	$ (7.39)	$ (8.50)
Net Asset Value Per Unit-Ending Balance	$ 83.93		$ 83.93		$ 83.93
Trading | Class B
Net Asset Value Per Unit-Beginning Balance			$ 96.98
Net change per unit	$ (2.15)	$ (4.47)	$ (6.95)	$ (7.88)
Net Asset Value Per Unit-Ending Balance	$ 90.03		$ 90.03		$ 90.03
Trading | Beneficial owners | Class A
Beginning Balances (in units)			355,858
Unitholders' contributions (in units)			1,574
Unitholders' redemptions (in unit)			(46,376)
Ending Balances (in units)	311,056		311,056		311,056
Beginning Balances			32,497,392
Net income (loss)			(2,521,373)
Unitholders' contributions			137,392
Unitholders' redemptions			(4,005,770)
Ending Balances	26,107,641		26,107,641		26,107,641
Trading | Beneficial owners | Class B
Beginning Balances (in units)			12,697
Unitholders' redemptions (in unit)			(2,285)
Ending Balances (in units)	10,412		10,412		10,412
Beginning Balances			1,231,294
Net income (loss)			(80,383)
Unitholders' redemptions			(213,532)
Ending Balances	937,379		937,379		937,379
Trading | Managing owner | Class A
Beginning Balances (in units)			535
Ending Balances (in units)	535		535		535
Beginning Balances			48,857
Net income (loss)			(3,954)
Ending Balances	44,903		44,903		44,903
LLC equity/Non-Trading
Beginning Balances (in units)			2,273,288
Ending Balances (in units)	2,273,288		2,273,288		2,273,288
Beginning Balances			1,174,664
Net income (loss)			(314,930)
Ending Balances	859,734		859,734		859,734
Net Asset Value Per Unit-Beginning Balance			$ 0.52
Net change per unit			$ (0.14)
Net Asset Value Per Unit-Ending Balance	$ 0.38		$ 0.38		$ 0.38
LLC equity/Non-Trading | Participating owners
Beginning Balances (in units)			306,807
Unitholders' redemptions (in unit)			(38,383)
Ending Balances (in units)	268,424		268,424		268,424
Beginning Balances			158,535
Net income (loss)			(40,223)
Unitholders' redemptions			(16,308)
Ending Balances	102,004		102,004		102,004
LLC equity/Non-Trading | Nonparticipating owners
Beginning Balances (in units)			1,966,481
Unitholders' redemptions (in unit)			38,383
Ending Balances (in units)	2,004,864		2,004,864		2,004,864
Beginning Balances			1,016,129
Net income (loss)			(274,707)
Unitholders' redemptions			16,308
Ending Balances	$ 757,730		$ 757,730		$ 757,730