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Derivative Instruments - Fair Value of Derivative Instruments (Detail) - USD ($) | Sep. 30, 2025 | Dec. 31, 2024
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Currency Futures Contracts [Member] | Not Designated as Hedging Instrument [Member] |  |  |
Derivatives, Fair Value [Line Items] |  |  |
Liabilities | [1] | $ (257,858) | $ (929,793)
[1] | Includes cumulative appreciation (depreciation) of currency futures contracts. Only the current day’s variation margin receivable (payable) is reported in the Statements of Financial Condition, if any.

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