Note 3 - Trust Expenses (Details Textual) - USD ($)		3 Months Ended	12 Months Ended
	Jun. 24, 2024	Mar. 31, 2025	Jul. 23, 2025
Sponsors Fee Annualized Accrual Rate Based on Daily Net Asset Value	0.25%	0.25%
Sponsor's Fees		$ 2,038,502
Sponsor Fees Waived		791,853
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