v3.26.1
Australian Dollar Deposits - Additional Information (Detail)
6 Months Ended 12 Months Ended
Jun. 30, 2026
USD ($)
Jun. 30, 2026
AUD ($)
Jun. 30, 2025
USD ($)
Dec. 31, 2025
AUD ($)
Jun. 30, 2026
AUD ($)
Dec. 31, 2025
USD ($)
Dec. 31, 2025
AUD ($)
Cash and Cash Equivalents [Abstract]              
Annual nominal rate 1.92%       1.92%    
Principal deposits $ 13,842,616 $ 19,796,132 $ 34,906,162 $ 79,184,529      
Principal redemptions 3,303,220 $ 4,949,033 $ 6,198,367 $ 54,439,364      
Deposits, interest bearing $ 99,431,876       $ 143,521,959 $ 85,806,694 $ 128,674,860