Derivative Instruments - Effect of Derivative Instruments on Statements of Income and Expenses (Detail) - USD ($)	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Derivative Instruments, Gain (Loss) [Line Items]
Futures contracts, Net realized gain (loss)	$ 525,337	$ 311,945	$ (298,084)
Futures contracts, Net change in unrealized gain (loss)	(726,419)	76,618	(143,034)
Currency Futures Contract [Member] | Not Designated as Hedging Instrument [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Futures contracts, Net realized gain (loss)	525,337	311,945	(298,084)
Futures contracts, Net change in unrealized gain (loss)	(726,419)	76,618	(143,034)
Futures Contracts, Net Realized and Net Change in Unrealized Gain (Loss)	$ (201,082)	$ 388,563	$ (441,118)