Statements of Income and Expenses - USD ($)		12 Months Ended
		Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Investment Income:
Interest income (Note 3c)			$ 82,500	$ 578,712
Expenses:
Ongoing selling agent fees (Note 3c)		$ 351,823	555,002	772,853
Clearing fees		270,566	340,389	536,122
Advisory fees (Note 3b)		361,999	565,549	796,902
Administrative fees (Note 3a)		180,998	282,774	398,449
Professional fees		288,512	298,354	279,758
Other		(4,209)	6,169	(3,181)
Total expenses		1,449,689	2,048,237	2,780,903
Net investment income (loss)		(1,449,689)	(1,965,737)	(2,202,191)
Net gains (losses) on trading of commodity interests:
Net realized gains (losses) on closed contracts		1,822,707	1,445,017	1,945,724
Change in net unrealized gains (losses) on open contracts		2,089	12,760	(14,848)
Total trading results		1,824,796	1,457,777	1,930,876
Net income (loss) before allocation to Special Limited Partner		375,107	(507,960)	(271,315)
Allocation to Special Limited Partner (Note 3b)		(816)
Net income (loss) available for Pro rata distribution
Net income (loss)		374,291	(507,960)	(271,315)
Class A [Member]
Net income (loss) available for Pro rata distribution
Net income (loss)		$ 346,294	$ (511,589)	$ (282,104)
Net income (loss) per unit (Note 6):*
Net income (loss) per unit	[1]	$ 28.67	$ (20.52)	$ (8.70)
Weighted average units outstanding:
Weighted average units outstanding		14,005.52	21,996.17	30,628.01
Class D [Member]
Net income (loss) available for Pro rata distribution
Net income (loss)		$ 13,457	$ (2,790)	$ 2,949
Net income (loss) per unit (Note 6):*
Net income (loss) per unit	[1]	$ 46.29	$ (5.44)	$ 7.19
Weighted average units outstanding:
Weighted average units outstanding		290.73	376.82	409.53
Class GP [Member]
Net income (loss) available for Pro rata distribution
Net income (loss)		$ 14,540	$ 6,419	$ 7,840
Net income (loss) per unit (Note 6):*
Net income (loss) per unit	[1]	$ 105.96	$ 46.75	$ 57.15
Weighted average units outstanding:
Weighted average units outstanding		137.21	137.21	137.21

[1] Based on change in net asset value per unit