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) | $ (4,551,411) | $ (2,570,178) |
| Futures contracts, unrealized gain (loss) | 62,882,638 | 53,790,691 |
| Commodity Futures Contract [Member] | Not Designated as Hedging Instrument [Member] | ||
| Derivative Instruments Gain Loss [Line Items] | ||
| Futures contracts, realized gain (loss) | (4,551,411) | (2,570,178) |
| Futures contracts, unrealized gain (loss) | 62,882,638 | 53,790,691 |
| Net Realized and Net Change in Unrealized Gain (Loss) | $ 58,331,227 | $ 51,220,513 |