Schedule of Investments - Treasury Bills and Money Market Fund - USD ($)		Dec. 31, 2024		Dec. 31, 2023
Schedule Of Investments [Line Items]
Percentage of Shareholders' Equity		100.26%		99.93%
United States Treasury Obligations, Value		$ 14,856,763		$ 29,517,982
Total Investments in Securities		51,168,499		65,364,155
Investments in Securities, cost		$ 51,160,945		$ 65,341,449
U.S. Treasury Bills, 4.400% due March 6, 2025 [Member]
Schedule Of Investments [Line Items]
Percentage of Shareholders' Equity	[1]	9.72%
United States Treasury Obligations, Value	[1]	$ 4,963,427
United States Treasury Obligations, Principal Value	[1]	$ 5,000,000
Investment Interest Rate	[1]	4.40%
Investment Maturity Date	[1]	Mar. 06, 2025
U.S. Treasury Bills, 4.230% due April 3, 2025 [Member]
Schedule Of Investments [Line Items]
Percentage of Shareholders' Equity	[1],[2]	19.39%
United States Treasury Obligations, Value	[1],[2]	$ 9,893,336
United States Treasury Obligations, Principal Value	[1],[2]	$ 10,000,000
Investment Interest Rate	[1],[2]	4.23%
Investment Maturity Date	[1],[2]	Apr. 03, 2025
Restricted for maintenance margin		$ 4,946,500
U.S. Treasury Bills, 5.250% due March 7, 2024 [Member]
Schedule Of Investments [Line Items]
Percentage of Shareholders' Equity	[3]			7.57%
United States Treasury Obligations, Value	[3]			$ 4,953,044
United States Treasury Obligations, Principal Value	[3]			$ 5,000,000
Investment Interest Rate	[3]			5.25%
Investment Maturity Date	[3]			Mar. 07, 2024
U.S. Treasury Bills, 5.245% due April 4, 2024 [Member]
Schedule Of Investments [Line Items]
Percentage of Shareholders' Equity	[3]			15.08%
United States Treasury Obligations, Value	[3]			$ 9,865,796
United States Treasury Obligations, Principal Value	[3]			$ 10,000,000
Investment Interest Rate	[3]			5.245%
Investment Maturity Date	[3]			Apr. 04, 2024
U.S. Treasury Bills, 5.270% due May 16, 2024 [Member]
Schedule Of Investments [Line Items]
Percentage of Shareholders' Equity	[3],[4]			15.00%
United States Treasury Obligations, Value	[3],[4]			$ 9,808,450
United States Treasury Obligations, Principal Value	[3],[4]			$ 10,000,000
Investment Interest Rate	[3],[4]			5.27%
Investment Maturity Date	[3],[4]			May 16, 2024
Restricted for maintenance margin				$ 4,904,000
U.S. Treasury Bills, 5.190% due June 6, 2024 [Member]
Schedule Of Investments [Line Items]
Percentage of Shareholders' Equity	[3]			7.48%
United States Treasury Obligations, Value	[3]			$ 4,890,692
United States Treasury Obligations, Principal Value	[3]			$ 5,000,000
Investment Interest Rate	[3]			5.19%
Investment Maturity Date	[3]			Jun. 06, 2024
United States Treasury Obligations [Member]
Schedule Of Investments [Line Items]
Percentage of Shareholders' Equity		29.11%	[1]	45.13%	[3]
United States Treasury Obligations, Value		$ 14,856,763	[1]	$ 29,517,982	[3]
Investments in Securities, cost		$ 14,849,209	[1]	$ 29,495,276	[3]
Money Market Mutual Fund - Invesco Government and Agency Portfolio - Institutional Class [Member] | Affiliated Investments [Member]
Schedule Of Investments [Line Items]
Percentage of Shareholders' Equity		71.15%	[5],[6]	54.80%	[7],[8]
Shares		36,311,736	[5],[6]	35,846,173	[7],[8]
Affiliated Investments, at value		$ 36,311,736	[5],[6]	$ 35,846,173	[7],[8]
Investment Interest Rate		4.43%	[5],[6]	4.22%	[7],[8]
Investments in Securities, cost		$ 36,311,736	[5],[6]	$ 35,846,173	[7],[8]

[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 $4,946,500 are on deposit with the Commodity Broker and held as maintenance margin for open futures contracts.

[3] 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.

[4] United States Treasury Obligations of $4,904,000 are on deposit with the Commodity Broker and held as maintenance margin for open futures contracts.

[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, 2024.

[7] 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.

[8] The rate shown is the 7-day SEC standardized yield as of December 31, 2023.