Consolidated Statements of Operations (USD $)	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Gain (loss) on trading of commodity contracts:
Realized gain (loss) on closed positions	$ (42,784)	$ (805,366)
Change in unrealized gain (loss) on open positions	181,964	(337,344)
Change in unrealized gain (loss) on investment in Global Diversified Managed Futures Portfolio LLC	28,719
Foreign currency transaction gain (loss)	(6,152)	(11,477)
Total Trading gain (loss)	161,747	(1,154,187)
Net investment income (loss):
Interest income	81,215	98,940
Realized gain (loss) on fixed income securities	(6,993)	(131,014)
Change in unrealized gain (loss) on fixed income securities	(57,888)	81,309
Total net investment gain (loss)	16,334	49,235
Expenses:
Commissions	243,571	395,327
Advisory fees paid to affiliate	8,925	15,319
Management fees	103,854	135,619
Incentive fees
Ongoing offering expenses	7,500	16,466
Operating expenses	116,000	133,533
Total expenses	479,850	696,264
Trading income (loss)	(301,769)	(1,801,216)
Non-Trading income (loss):
Interest on Non-Trading reserve	144	59
Legal and administrative fees	(34,335)	(756)
Management fees paid to US Bank	(76,504)	(102,582)
Non-Trading income (loss)	(110,695)	(103,279)
Net income (loss)	(412,464)	(1,904,495)
Class A [Member]
Expenses:
Commissions	239,135	386,838
Class B [Member]
Expenses:
Commissions	$ 4,436	$ 8,489