Schedule of Investments (Unaudited) - Treasury Bills and Money Market Fund - USD ($)		Jun. 30, 2022		Dec. 31, 2021
Schedule Of Investments [Line Items]
Percentage of Shareholders' Equity		99.64%		99.74%
United States Treasury Obligations, Value		$ 17,843,074		$ 17,000,743
Affiliated investments, value		31,740,361		31,507,548
Investments in Securities, Value		49,583,435		48,508,291
Investments in Securities, cost		49,622,917		$ 48,507,955
Restricted for maintenance margin		$ 3,980,600
U.S. Treasury Bills, 1.050% due August 18, 2022 [Member]
Schedule Of Investments [Line Items]
Percentage of Shareholders' Equity	[1],[2]	4.01%
United States Treasury Obligations, Value	[1],[2]	$ 1,996,453
United States Treasury Obligations, Principal Value	[1],[2]	$ 2,000,000
Investment Interest Rate	[1],[2]	1.05%
Investment Maturity Date	[1],[2]	Aug. 18, 2022
U.S. Treasury Bills, 1.490% due November 17, 2022 [Member]
Schedule Of Investments [Line Items]
Percentage of Shareholders' Equity	[1],[2]	3.99%
United States Treasury Obligations, Value	[1],[2]	$ 1,984,227
United States Treasury Obligations, Principal Value	[1],[2]	$ 2,000,000
Investment Interest Rate	[1],[2]	1.49%
Investment Maturity Date	[1],[2]	Nov. 17, 2022
U.S. Treasury Bills, 1.580% due December 1, 2022 [Member]
Schedule Of Investments [Line Items]
Percentage of Shareholders' Equity	[1]	5.97%
United States Treasury Obligations, Value	[1]	$ 2,971,966
United States Treasury Obligations, Principal Value	[1]	$ 3,000,000
Investment Interest Rate	[1]	1.58%
Investment Maturity Date	[1]	Dec. 01, 2022
U.S. Treasury Bills, 1.710% due December 8, 2022 [Member]
Schedule Of Investments [Line Items]
Percentage of Shareholders' Equity	[1]	21.89%
United States Treasury Obligations, Value	[1]	$ 10,890,428
United States Treasury Obligations, Principal Value	[1]	$ 11,000,000
Investment Interest Rate	[1]	1.71%
Investment Maturity Date	[1]	Dec. 08, 2022
United State Treasury Obligation [Member]
Schedule Of Investments [Line Items]
Percentage of Shareholders' Equity		35.86%		34.96%	[1]
United States Treasury Obligations, Value		$ 17,843,074		$ 17,000,743	[1]
Investments in Securities, cost	[1]	$ 17,882,556		$ 17,000,407
Money Market Mutual Fund - Invesco Government and Agency Portfolio - Institutional Class [Member] | Affiliated Investments [Member]
Schedule Of Investments [Line Items]
Percentage of Shareholders' Equity		63.78%	[3],[4]	64.78%	[5],[6]
Affiliated investments, value		$ 31,740,361	[3],[4]	$ 31,507,548	[5],[6]
Shares		31,740,361	[3],[4]	31,507,548	[5],[6]
Investment Interest Rate		1.39%	[3],[4]	0.03%	[5],[6]
Investments in Securities, cost		$ 31,740,361	[3],[4]	$ 31,507,548	[5],[6]
U.S. Treasury Bills, 0.040% due January 6, 2022 [Member]
Schedule Of Investments [Line Items]
Percentage of Shareholders' Equity	[1]			8.22%
United States Treasury Obligations, Value	[1]			$ 4,000,000
United States Treasury Obligations, Principal Value	[1]			$ 4,000,000
Investment Interest Rate	[1]			0.04%
Investment Maturity Date	[1]			Jan. 06, 2022
U.S. Treasury Bills, 0.050% due February 3, 2022 [Member]
Schedule Of Investments [Line Items]
Percentage of Shareholders' Equity	[1]			10.28%
United States Treasury Obligations, Value	[1]			$ 5,001,293
United States Treasury Obligations, Principal Value	[1]			$ 5,001,400
Investment Interest Rate	[1]			0.05%
Investment Maturity Date	[1]			Feb. 03, 2022
U.S. Treasury Bills, 0.070% due March 10, 2022 [Member]
Schedule Of Investments [Line Items]
Percentage of Shareholders' Equity	[1],[7]			16.46%
United States Treasury Obligations, Value	[1],[7]			$ 7,999,450
United States Treasury Obligations, Principal Value	[1],[7]			$ 8,000,000
Investment Interest Rate	[1],[7]			0.07%
Investment Maturity Date	[1],[7]			Mar. 10, 2022
U.S. Treasury Bills, XX% due XX [Member]
Schedule Of Investments [Line Items]
Restricted for maintenance margin				$ 3,999,600

[1] Security may be traded on a discount basis. The interest rate shown represents the discount rate at the most recent auction date of the security prior to period end.

[2] United States Treasury Obligations of $3,980,600 are on deposit with the Commodity Broker and held as maintenance margin for open futures contracts

[3] Affiliated issuer. The issuer and/or the Fund is a wholly-owned subsidiary of Invesco Ltd., or is affiliated by having an investment adviser that is under common control of Invesco Ltd. See Note 8

[4] The rate shown is the 7-day SEC standardized yield as of June 30, 2022.

[5] Affiliated issuer. The issuer and/or the Fund is a wholly-owned subsidiary of Invesco Ltd., or is affiliated by having an investment adviser that is under common control of Invesco Ltd. See Note 8.

[6] The rate shown is the 7-day SEC standardized yield as of December 31, 2021

[7] United States Treasury Obligations of $3,999,600 are on deposit with the Commodity Broker and held as maintenance margin for open futures contracts.