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. 8, 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. | |