Statements of Income and Expenses - USD ($)		12 Months Ended
		Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Investment Income:
Interest income		$ 950,831	$ 100,285	$ 13,464
Interest income allocated from the Funds		1,610,034	622,396	343,399
Total investment income		2,560,865	722,681	356,863
Expenses:
Expenses allocated from the Funds		950,866	920,141	1,931,290
Clearing fees related to direct investments (Note 3c)		198,500	78,467	34,851
Ongoing selling agent fees (Notes 3d and 3e)		3,008,401	2,280,301	3,612,608
General Partner fees (Note 3a)		1,587,715	1,135,421	1,800,622
Management fees (Note 3b)		1,669,655	1,575,891	2,401,013
Incentive fees (Note 3b)		1,209,783		188,689
Professional fees		684,585	504,189	564,889
Total expenses		9,309,505	6,494,410	10,533,962
Net investment loss		(6,748,640)	(5,771,729)	(10,177,099)
Net gains (losses) on trading of commodity interests and investment in the Funds:
Net realized gains (losses) on closed contracts		(6,854,605)	115,346	(1,471,792)
Net realized gains (losses) on closed contracts allocated from the Funds		350,555	(2,377,104)	(5,763,377)
Net change in unrealized gains (losses) on open contracts		1,438,160	371,299	369,824
Net change in unrealized gains (losses) on open contracts allocated from the Funds		598,593	(591,188)	(625,399)
Total trading results		(4,467,297)	(2,481,647)	(7,490,744)
Net income (loss)		(11,215,937)	(8,253,376)	(17,667,843)
Class A Redeemable Units [Member]
Net gains (losses) on trading of commodity interests and investment in the Funds:
Net income (loss)		$ (10,464,309)	$ (8,253,376)	$ (17,667,843)
Net income (loss) per Redeemable Unit	[1]	$ (59.35)	$ (60.21)	$ (95.61)
Weighted average Redeemable Units outstanding		180,814.6943	133,367.4640	190,017.8082
Class D Redeemable Units [Member]
Net gains (losses) on trading of commodity interests and investment in the Funds:
Net income (loss)		$ (615,564)
Net income (loss) per Redeemable Unit	[1]	$ (60.10)
Weighted average Redeemable Units outstanding		10,851.3914
Class Z Redeemable Units [Member]
Net gains (losses) on trading of commodity interests and investment in the Funds:
Net income (loss)		$ (136,064)
Net income (loss) per Redeemable Unit	[1]	$ (52.97)
Weighted average Redeemable Units outstanding		2,133.6323

[1] Represents the change in net asset value per Redeemable Unit.