Derivative Instruments - Effect of Derivative Instruments on Statements of Income and Expenses (Detail) - USD ($) |
3 Months Ended | |
|---|---|---|
Mar. 31, 2025 |
Mar. 31, 2024 |
|
| Derivative Instruments Gain Loss [Line Items] | ||
| Futures contracts, realized gain (loss) | $ 291,882 | $ (153,941) |
| Futures Contracts, Net Unrealized Gain (Loss) | 25,670,738 | 7,725,986 |
| Commodity Futures Contract [Member] | Not Designated as Hedging Instrument [Member] | ||
| Derivative Instruments Gain Loss [Line Items] | ||
| Futures contracts, realized gain (loss) | 291,882 | (153,941) |
| Futures Contracts, Net Unrealized Gain (Loss) | 25,670,738 | 7,725,986 |
| Future Contracts, Net Realized and Unrealized Gain (Loss) | $ 25,962,620 | $ 7,572,045 |