Condensed Schedule Of Investments (U.S. Treasury Notes) - USD ($)	Dec. 31, 2021	Dec. 31, 2020
Summary of Investment Holdings [Line Items]
Fair Value as a % of Partners' Capital	(0.24%)	2.81%
U.S. Treasury notes, 2.500%, 02/15/2022 [Member]
Summary of Investment Holdings [Line Items]
Face Amount	$ 30,700,000
Fair Value as a % of Partners' Capital	26.01%
Fair Value	$ 30,788,742
U.S. Treasury notes, 2.375%, 03/15/2022 [Member]
Summary of Investment Holdings [Line Items]
Face Amount	$ 47,840,000
Fair Value as a % of Partners' Capital	40.61%
Fair Value	$ 48,062,381
U.S. Treasury notes, 1.750%, 05/15/2022 [Member]
Summary of Investment Holdings [Line Items]
Face Amount	$ 26,270,000
Fair Value as a % of Partners' Capital	22.32%
Fair Value	$ 26,423,926
U.S. Treasury Notes 2.250% 2/15/2021 [Member]
Summary of Investment Holdings [Line Items]
Face Amount		$ 49,140,000
Fair Value as a % of Partners' Capital		41.55%
Fair Value		$ 49,264,769
U.S. Treasury Notes 2.625% 5/15/2021 [Member]
Summary of Investment Holdings [Line Items]
Face Amount		$ 27,200,000
Fair Value as a % of Partners' Capital		23.16%
Fair Value		$ 27,450,219
U.S. Treasury Notes 2.750% 8/15/2021 [Member]
Summary of Investment Holdings [Line Items]
Face Amount		$ 24,470,000
Fair Value as a % of Partners' Capital		20.98%
Fair Value		$ 24,869,549
U.S. Treasury Notes [Member]
Summary of Investment Holdings [Line Items]
Fair Value as a % of Partners' Capital	88.94%	85.69%
Fair Value	$ 105,275,049	$ 101,584,537