Consolidated Statement of Changes in Unitholders' Capital (USD $)	3 Months Ended
	Mar. 31, 2012
Beginning Balances	$ 34,952,207
Net income (loss)	(1,904,495)
Ending Balances	31,012,850
Total unitholders' capital	31,012,850
Trading
Beginning Balances (in units)	369,090
Unitholders' contributions (in units)	1,574
Unitholders redemptions (in units)	(24,775)
Ending Balances (in units)	345,889
Beginning Balances	33,777,543
Net income (loss)	(1,801,216)
Unitholders' contributions	137,392
Unitholders redemptions	(2,172,254)
Ending Balances	29,941,465
Total unitholders' capital	29,941,465
Trading | Class A
Net Asset Value Per Unit-Beginning Balance	$ 91.32
Net change per unit	$ (4.95)
Net Asset Value Per Unit-Ending Balance	$ 86.37
Trading | Class B
Net Asset Value Per Unit-Beginning Balance	$ 96.98
Net change per unit	$ (4.80)
Net Asset Value Per Unit-Ending Balance	$ 92.18
Trading | Beneficial owners | Class A
Beginning Balances (in units)	355,858
Unitholders' contributions (in units)	1,574
Unitholders redemptions (in units)	(23,379)
Ending Balances (in units)	334,053
Beginning Balances	32,497,392
Net income (loss)	(1,740,142)
Unitholders' contributions	137,392
Unitholders redemptions	(2,041,122)
Ending Balances	28,853,520
Total unitholders' capital	28,853,520
Trading | Beneficial owners | Class B
Beginning Balances (in units)	12,697
Unitholders redemptions (in units)	(1,396)
Ending Balances (in units)	11,301
Beginning Balances	1,231,294
Net income (loss)	(58,427)
Unitholders redemptions	(131,132)
Ending Balances	1,041,735
Total unitholders' capital	1,041,735
Trading | Managing owner | Class A
Beginning Balances (in units)	535
Ending Balances (in units)	535
Beginning Balances	48,857
Net income (loss)	(2,647)
Ending Balances	46,210
Total unitholders' capital	46,210
LLC equity/Non-Trading
Beginning Balances (in units)	2,273,288
Ending Balances (in units)	2,273,288
Beginning Balances	1,174,664
Net income (loss)	(103,279)
Ending Balances	1,071,385
Total unitholders' capital	1,071,385
Net Asset Value Per Unit-Beginning Balance	$ 0.52
Net change per unit	$ (0.05)
Net Asset Value Per Unit-Ending Balance	$ 0.47
LLC equity/Non-Trading | Participating owners
Beginning Balances (in units)	306,807
Unitholders redemptions (in units)	(19,138)
Ending Balances (in units)	287,669
Beginning Balances	158,535
Net income (loss)	(14,334)
Unitholders redemptions	(8,995)
Ending Balances	135,206
Total unitholders' capital	135,206
LLC equity/Non-Trading | Nonparticipating owners
Beginning Balances (in units)	1,966,481
Unitholders redemptions (in units)	19,138
Ending Balances (in units)	1,985,619
Beginning Balances	1,016,129
Net income (loss)	(88,945)
Unitholders redemptions	8,995
Ending Balances	936,179
Total unitholders' capital	$ 936,179