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Euro Deposits - Additional Information (Detail)	12 Months Ended
	Dec. 31, 2024 USD ($)	Dec. 31, 2024 EUR (€)	Dec. 31, 2023 USD ($)	Dec. 31, 2023 EUR (€)	Dec. 31, 2024 EUR (€)	Dec. 31, 2023 EUR (€)
Cash and Cash Equivalents [Abstract]
Annual nominal rate	1.90%				1.90%
Principal deposits	$ 85,330,057	€ 73,810,979	$ 149,222,668	€ 143,008,612
Principal redemptions	119,945,197	€ 110,717,094	229,147,352	€ 212,205,189
Deposits, interest bearing	$ 167,191,705		$ 219,126,536		€ 161,458,560	€ 198,366,488

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Amount of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Excludes cash and cash equivalents within disposal group and discontinued operation.

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Rate of interest on investment.

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