v3.26.1
Swiss Franc Deposits - Additional Information (Detail)
6 Months Ended 12 Months Ended
Jun. 30, 2026
USD ($)
Jun. 30, 2026
CHF (SFr)
Jun. 30, 2025
USD ($)
Dec. 31, 2025
CHF (SFr)
Jun. 30, 2026
CHF (SFr)
Dec. 31, 2025
USD ($)
Dec. 31, 2025
CHF (SFr)
Cash and Cash Equivalents [Abstract]              
Principal deposits $ 221,950,507 SFr 172,343,503 $ 381,128,335 SFr 328,366,011      
Principal redemptions 173,918,308 136,858,897 $ 52,244,874 141,890,558      
Withdrawals (to pay expenses)   SFr 1,046,970   SFr 1,261,199      
Deposits, interest bearing $ 432,069,779       SFr 348,529,087 $ 396,454,971 SFr 314,091,451
Annual nominal rate (0.15%)       (0.15%)