Note 3 - Trust Expenses (Details Textual) - USD ($)		3 Months Ended	4 Months Ended	12 Months Ended
	Jun. 24, 2024	Sep. 30, 2024	Sep. 30, 2024	Jul. 23, 2025
Sponsors Fee Annualized Accrual Rate Based on Daily Net Asset Value	0.25%		0.25%
Sponsor's Fees		$ 358,491	$ 358,911
Sponsor Fees Waived		$ 186,634	186,634
Maximum [Member]
Legal Fees Per Year			$ 500,000
Forecast [Member]
Sponsors Fee After Fee Waiver, Percentage				0.12%
Maximum Amount of Trust Assets for Sponsor's Fee After Fee Waiver				$ 2,500,000,000