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Australian Dollar Deposits - Additional Information (Detail) | 12 Months Ended |  |
--- | --- | --- | ---
Dec. 31, 2024 USD ($) | Dec. 31, 2024 AUD ($) | Dec. 31, 2023 USD ($) | Dec. 31, 2023 AUD ($) | Dec. 31, 2024 AUD ($) | Dec. 31, 2023 AUD ($)
Cash and Cash Equivalents [Abstract] |  |  |  |  |  |
Annual nominal rate | 1.92% |  |  |  | 1.92% |
Principal deposits | $ 35,707,713 | $ 54,439,364 | $ 19,742,611 | $ 29,694,198 |  |
Principal redemptions | 42,281,165 | $ 64,337,430 | 30,120,478 | $ 34,643,231 |  |
Deposits, interest bearing | $ 64,347,970 |  | $ 77,670,560 |  | $ 103,929,695 | $ 113,827,761

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