Condensed Schedule of Investments	Dec. 31, 2017 USD ($) Contract	Dec. 31, 2016 USD ($) Contract
Schedule of Investments [Line Items]
% of Partners’ Capital	0.00%	(0.11%)
Fair Value	$ 211,200	$ 621,000
Fair Value	(209,000)	(699,200)
Net fair value	$ 2,200	$ (78,200)
Call or Put Options Purchased [Member]
Schedule of Investments [Line Items]
% of Partners’ Capital	0.36%	0.86%
Fair Value	$ 211,200	$ 621,000
Call or Put Written Options [Member]
Schedule of Investments [Line Items]
% of Partners’ Capital	(0.36%)	(0.97%)
Fair Value	$ (209,000)	$ (699,200)
United States Government Treasury Bills [Member]
Schedule of Investments [Line Items]
Fair Value	$ 25,107,663	$ 34,993,486
% of Partners’ Capital	42.52%	48.73%
United States Government Treasury Bills [Member] | Treasury Bill 0% due March 8, 2018 [Member]
Schedule of Investments [Line Items]
Face Value	$ 4,049,500
Fair Value	$ 4,040,183
% of Partners’ Capital	6.84%
United States Government Treasury Bills [Member] | Treasury Bill 0% due February 22, 2018 [Member]
Schedule of Investments [Line Items]
Face Value	$ 8,037,200
Fair Value	$ 8,024,662
% of Partners’ Capital	13.59%
United States Government Treasury Bills [Member] | Treasury Bill 0% due February 1, 2018 [Member]
Schedule of Investments [Line Items]
Face Value	$ 6,024,500
Fair Value	$ 6,019,001
% of Partners’ Capital	10.19%
United States Government Treasury Bills [Member] | Treasury Bill 0% due January 4, 2018 [Member]
Schedule of Investments [Line Items]
Face Value	$ 7,024,400
Fair Value	$ 7,023,817
% of Partners’ Capital	11.90%
United States Government Treasury Bills [Member] | Treasury Bill 0% due May 4, 2017 [Member]
Schedule of Investments [Line Items]
Face Value		$ 8,016,200
Fair Value		$ 8,000,314
% of Partners’ Capital		11.14%
United States Government Treasury Bills [Member] | Treasury Bill 0% due April 6, 2017 [Member]
Schedule of Investments [Line Items]
Face Value		$ 9,000,000
Fair Value		$ 8,990,343
% of Partners’ Capital		12.52%
United States Government Treasury Bills [Member] | Treasury Bill 0% due March 2, 2017 [Member]
Schedule of Investments [Line Items]
Face Value		$ 9,010,000
Fair Value		$ 9,004,809
% of Partners’ Capital		12.54%
United States Government Treasury Bills [Member] | Treasury Bill 0% due February 2, 2017 [Member]
Schedule of Investments [Line Items]
Face Value		$ 9,000,000
Fair Value		$ 8,998,020
% of Partners’ Capital		12.53%
Put Option [Member] | Call or Put Options Purchased [Member]
Schedule of Investments [Line Items]
Number of Contracts | Contract	264	184
% of Partners’ Capital	0.36%	0.86%
Fair Value	$ 211,200	$ 621,000
Put Option [Member] | Call or Put Written Options [Member]
Schedule of Investments [Line Items]
Number of Contracts | Contract	1,056	920
% of Partners’ Capital	(0.34%)	(0.88%)
Fair Value	$ (198,000)	$ (630,200)
Call Option [Member] | Call or Put Written Options [Member]
Schedule of Investments [Line Items]
Number of Contracts | Contract	440	920
% of Partners’ Capital	(0.02%)	(0.10%)
Fair Value	$ (11,000)	$ (69,000)