v3.26.1
British Pound Sterling Deposits - Additional Information (Detail)
6 Months Ended 12 Months Ended
Jun. 30, 2026
USD ($)
Jun. 30, 2026
GBP (£)
Jun. 30, 2025
USD ($)
Dec. 31, 2025
GBP (£)
Jun. 30, 2026
GBP (£)
Dec. 31, 2025
USD ($)
Dec. 31, 2025
GBP (£)
Cash and Cash Equivalents [Abstract]              
Principal deposits $ 45,326,082 £ 33,657,938 $ 50,403,818 £ 72,046,904      
Principal redemptions 51,458,657 £ 33,655,223 $ 24,273,822 £ 62,440,650      
Deposits, interest bearing $ 76,499,153       £ 57,640,237 $ 77,525,014 £ 57,637,522
Annual nominal rate 2.46%       2.46%