Condensed Schedule Of Investments (U.S. Treasury Notes) (Parenthetical) - USD ($)	Dec. 31, 2021	Dec. 31, 2020
U.S. Treasury notes, 2.500%, 02/15/2022 [Member]
Summary of Investment Holdings [Line Items]
Investment Interest Rate	0.025%
Investment Maturity Date	Feb. 15, 2022
U.S. Treasury notes, 2.375%, 03/15/2022 [Member]
Summary of Investment Holdings [Line Items]
Investment Interest Rate	0.02375%
Investment Maturity Date	Mar. 15, 2022
U.S. Treasury notes, 1.750%, 05/15/2022 [Member]
Summary of Investment Holdings [Line Items]
Investment Interest Rate	0.0175%
Investment Maturity Date	May 15, 2022
U.S. Treasury Notes 2.250% 2/15/2021 [Member]
Summary of Investment Holdings [Line Items]
Investment Interest Rate		0.0225%
Investment Maturity Date		Feb. 15, 2021
U.S. Treasury Notes 2.625% 5/15/2021 [Member]
Summary of Investment Holdings [Line Items]
Investment Interest Rate		0.02625%
Investment Maturity Date		May 15, 2021
U.S. Treasury Notes 2.750% 8/15/2021 [Member]
Summary of Investment Holdings [Line Items]
Investment Interest Rate		0.0275%
Investment Maturity Date		Aug. 15, 2021
U.S. Treasury Notes [Member]
Summary of Investment Holdings [Line Items]
Amortized Cost of U.S. Treasury Notes	$ 105,296,048	$ 101,593,916