Note 3 - Trust Expenses (Details Textual) - USD ($) |
3 Months Ended | 6 Months Ended | 12 Months Ended | |||
|---|---|---|---|---|---|---|
Jan. 05, 2024 |
Jun. 30, 2025 |
Jun. 30, 2024 |
Jun. 30, 2025 |
Jun. 30, 2024 |
Jan. 11, 2025 |
|
| Sponsors Fee Annualized Accrual Rate Based on Daily Net Asset Value | 0.25% | 0.25% | ||||
| Sponsor's Fees | $ 38,686,944 | $ 11,510,364 | $ 71,730,495 | $ 15,721,583 | ||
| 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 | $ (0) | $ 1,616,120 | 178,082 | $ 2,690,670 | ||
| Maximum [Member] | ||||||
| Legal Fees Per Year | $ 500,000 | |||||