Note 3 - Trust Expenses (Details Textual) - USD ($) |
3 Months Ended | 12 Months Ended | ||
|---|---|---|---|---|
Jan. 05, 2024 |
Mar. 31, 2025 |
Mar. 31, 2024 |
Jan. 11, 2025 |
|
| Sponsors Fee Annualized Accrual Rate Based on Daily Net Asset Value | 0.25% | 0.25% | ||
| Sponsor's Fees | $ 33,043,551 | $ 4,211,219 | ||
| Sponsors Fee After Fee Waiver, Percentage | 0.12% | |||
| Maximum Amount of Trust Assets for Sponsor's Fee After Fee Waiver | $ 5,000,000,000 | |||
| Sponsor Fees Waived | 178,082 | $ 1,074,550 | ||
| Maximum [Member] | ||||
| Legal Fees Per Year | $ 500,000 | |||