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Euro Deposits - Additional Information (Detail) | 3 Months Ended | 12 Months Ended |  |
--- | --- | --- | --- | ---
Mar. 31, 2024 USD ($) | Mar. 31, 2024 EUR (€) | Mar. 31, 2023 USD ($) | Dec. 31, 2023 EUR (€) | Mar. 31, 2024 EUR (€) | Dec. 31, 2023 USD ($) | Dec. 31, 2023 EUR (€)
Cash and Cash Equivalents [Abstract] |  |  |  |  |  |  |
Annual nominal rate | 2.70% |  |  |  | 2.70% |  |
Principal deposits | $ 25,160,936 | € 18,453,002 | $ 29,416,443 | € 143,007,863 |  |  |
Principal redemptions | 35,026,765 | € 32,292,264 | $ 49,743,105 | € 212,205,189 |  |  |
Deposits, interest bearing | $ 199,288,526 |  |  |  | € 184,527,225 | $ 219,125,708 | € 198,364,675

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