Note 8 - Financial Highlights - Financial Highlights (Details) - $ / shares		3 Months Ended		9 Months Ended
		Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Net asset value per Share, beginning of period (in dollars per share)		$ 60.89	$ 36.07	$ 53.09	$ 25
Net investment loss (in dollars per share)	[1]	(0.04)	(0.02)	(0.11)	(0.06)
Net realized and unrealized gain (loss) (in dollars per share)	[2]	3.98	0.18	11.85	11.29
Net increase in net assets from operations (in dollars per share)		3.94	0.16	11.74	11.23
Net asset value per Share, end of period (in dollars per share)		$ 64.83	$ 36.23	$ 64.83	$ 36.23
Total return, at net asset value	[3],[4]	6.47%	0.44%	22.11%	37.80%	[5],[6]
Ratio to average net assets:
Net investment loss	[7]	(0.25%)	(0.22%)	(0.25%)	(0.21%)
Total expenses	[7]	0.25%	0.25%	0.25%	0.25%
Total expenses after fees waived	[7]	0.25%	0.22%	0.25%	0.21%

[1] Based on average Shares outstanding during the period.

[2] The amounts reported for a Share outstanding may not accord with the change in aggregate gains and losses on investment for the period due to the timing of Share transactions in relation to the fluctuating fair values of the Trust’s underlying investment.

[3] Based on the change in net asset value of a Share during the period.

[4] Percentage is not annualized.

[5] For the period January 1, 2024 to September 30, 2024, the Trust’s total return was 44.92%.

[6] For the period January 10, 2024 (Effective Date) to September 30, 2024.

[7] Percentage is annualized.