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Australian Dollar Deposits - Additional Information (Detail)
3 Months Ended 12 Months Ended
Mar. 31, 2024
USD ($)
Mar. 31, 2024
AUD ($)
Mar. 31, 2023
USD ($)
Dec. 31, 2023
AUD ($)
Mar. 31, 2024
AUD ($)
Dec. 31, 2023
USD ($)
Dec. 31, 2023
AUD ($)
Cash and Cash Equivalents [Abstract]              
Annual nominal rate 1.92%       1.92%    
Principal deposits $ 13,048,072 $ 19,796,132 $ 3,410,985 $ 29,694,198      
Principal redemptions 19,426,306 $ 29,694,198 $ 13,464,109 $ 34,643,231      
Deposits, interest bearing $ 67,803,819       $ 103,929,695 $ 77,670,560 $ 113,827,761