Schedule of Investments - Treasury Bills and Money Market Fund - USD ($)		Dec. 31, 2021		Dec. 31, 2020
Schedule of Investments [Line Items]
Percentage of Shareholders' Equity		97.68%		99.31%
United States Treasury Obligations, Value		$ 5,999,443		$ 11,998,090
Affiliated Investments, Value		12,944,971		13,839,876
Investments in Securities, Value		18,944,414		25,837,966
Investments in Securities, Cost		$ 18,944,357		$ 25,837,446
U.S. Treasury Bills, 0.055% due January 20, 2022 [Member]
Schedule of Investments [Line Items]
Percentage of Shareholders' Equity	[1]	10.31%
United States Treasury Obligations, Value	[1]	$ 1,999,993
United States Treasury Obligations, Principal Value	[1]	$ 2,000,000
Investment Interest Rate	[1]	0.055%
Investment Maturity Date	[1]	Jan. 20, 2022
Restricted for maintenance margin	[1]	$ 5,999,200
U.S. Treasury Bills, 0.070% due March 10, 2022 [Member]
Schedule of Investments [Line Items]
Percentage of Shareholders' Equity	[1]	10.31%
United States Treasury Obligations, Value	[1]	$ 1,999,862
United States Treasury Obligations, Principal Value	[1]	$ 2,000,000
Investment Interest Rate	[1]	0.07%
Investment Maturity Date	[1]	Mar. 10, 2022
U.S. Treasury Bills, 0.060% due April 21, 2022 [Member]
Schedule of Investments [Line Items]
Percentage of Shareholders' Equity	[1]	10.31%
United States Treasury Obligations, Value	[1]	$ 1,999,588
United States Treasury Obligations, Principal Value	[1]	$ 2,000,000
Investment Interest Rate	[1]	0.06%
Investment Maturity Date	[1]	Apr. 21, 2022
United States Treasury Obligations [Member]
Schedule of Investments [Line Items]
Percentage of Shareholders' Equity		30.93%		46.12%
United States Treasury Obligations, Value		$ 5,999,443		$ 11,998,090
Investments in Securities, Cost		$ 5,999,386		$ 11,997,570
Money Market Mutual Fund - Invesco Government & Agency Portfolio [Member] | Affiliated Investments [Member]
Schedule of Investments [Line Items]
Percentage of Shareholders' Equity		66.75%	[2],[3]	53.19%	[4],[5]
Affiliated Investments, Value		$ 12,944,971	[2],[3]	$ 13,839,876	[4],[5]
Affiliated Investments, Shares		12,944,971	[2],[3]	13,839,876	[4],[5]
Investment Interest Rate	[2]	0.03%
Investments in Securities, Cost	[2]	$ 12,944,971
U.S. Treasury Bills, 0.090% due March 25, 2021 [Member]
Schedule of Investments [Line Items]
Percentage of Shareholders' Equity	[6]			19.22%
United States Treasury Obligations, Value	[6]			$ 4,999,278
United States Treasury Obligations, Principal Value	[6]			$ 5,000,000
Investment Interest Rate	[6]			0.09%
Investment Maturity Date	[6]			Mar. 25, 2021
Restricted for maintenance margin	[6]			$ 8,997,800
U.S. Treasury Bills, 0.090% due April 8, 2021 [Member]
Schedule of Investments [Line Items]
Percentage of Shareholders' Equity	[6]			26.90%
United States Treasury Obligations, Value	[6]			$ 6,998,812
United States Treasury Obligations, Principal Value	[6]			$ 7,000,000
Investment Interest Rate	[6]			0.09%
Investment Maturity Date	[6]			Apr. 08, 2021
Money Market Mutual Fund - Invesco Premier U.S. Government Money Portfolio - Institutional Class [Member] | Affiliated Investments [Member]
Schedule of Investments [Line Items]
Investment Interest Rate	[4],[5]			0.03%
Investments in Securities, Cost	[4],[5]			$ 13,839,876

[1] United States Treasury Obligations of $5,999,200 are on deposit with the Commodity Broker and held as maintenance margin for open futures contracts.

[2] 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.

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

[4] 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

[5] The rate shown is the 7-day SEC standardized yield as of December 31, 2020.

[6] United States Treasury Obligations of $8,997,800 are on deposit with the Commodity Broker and held as maintenance margin for open futures contracts.