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Euro Deposits - Additional Information (Detail)
9 Months Ended 12 Months Ended
Sep. 30, 2023
USD ($)
Sep. 30, 2023
EUR (€)
Sep. 30, 2022
USD ($)
Dec. 31, 2022
EUR (€)
Sep. 30, 2023
EUR (€)
Dec. 31, 2022
USD ($)
Dec. 31, 2022
EUR (€)
Cash and Cash Equivalents [Abstract]              
Annual nominal rate 2.70%       2.70%    
Principal deposits $ 124,870,310 € 115,328,907 $ 525,443,080 € 679,568,682      
Principal redemptions 179,877,697 € 166,073,625 $ 305,890,504 596,144,853      
Withdrawals (to pay expenses)       € 1,970,473      
Deposits, interest bearing $ 229,556,432       € 216,818,346 $ 285,555,944 € 267,562,001