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Schedule of Investments (Parenthetical) - USD ($) | Dec. 31, 2021 | Dec. 31, 2020
--- | --- | ---
Collateral amount on open futures contracts | $ 57,197,387 | $ 33,830,326
Cash Equivalents [Member] | United States - Money Market Funds [Member] | Fidelity Investments Money Market Funds - Government Portfolio [Member] |  |
Interest rate |  | 0.01%
Cash Equivalents [Member] | United States - Money Market Funds [Member] | Goldman Sachs Financial Square Government Fund - Institutional Shares [Member] |  |
Interest rate | 0.03% |
Cash Equivalents [Member] | United States - Money Market Funds [Member] | Morgan Stanley Institutional Liquidity Funds - Government Portfolio - Institutional Shares [Member] |  |
Interest rate | 0.03% |
Cash Equivalents [Member] | United States - Money Market Funds [Member] | RBC U.S. Government Money Market Fund - Institutional Shares [Member] |  |
Interest rate | 0.03% | 0.02%

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