Financial Highlights - Schedule of Financial Highlights (Details) - $ / shares		3 Months Ended				4 Months Ended	9 Months Ended
		Sep. 30, 2025		Sep. 30, 2024		Sep. 30, 2024	Sep. 30, 2025
Schedule Of Financial Highlights Abstract
Net asset value per share, beginning of period		$ 36.41		$ 51.17		$ 50	$ 48.81
From investment operations:
Net investment loss		(0.02)	[1]		[1]		(0.03)	[1]
Net realized gain (loss) and change in unrealized appreciation/depreciation on investments in ether		24.05	[2]	(13.07)	[2]	(11.9)	11.66	[2]
Net decrease resulting from operations		24.03		(13.07)		(11.9)	11.63
Net asset value per share, end of period		$ 60.44		$ 38.1		$ 38.1	$ 60.44
Total return (%)	[3]	66.00%		(25.54%)		(23.80%)	23.83%
Ratios to average net assets(d)
Expenses before fee waiver	[4]	0.20%		0.20%		0.20%	0.20%
Expenses after fee waiver	[4]	0.17%		0.00%		0.00%	0.09%
Net investment loss	[4]	(0.17%)		0.00%		0.00%	(0.09%)

[1] Net investment loss per share has been calculated based upon an average of daily shares outstanding.

[2] The amount shown for a share outstanding throughout the year may not agree with the change in the aggregate gains and losses for the period because of the timing of sales and repurchases of the Trust’s shares in relation to fluctuating market values for the Trust.

[3] Returns are not annualized and include adjustments required by GAAP. Returns for financial statements purposes may differ from net asset values and performance reported elsewhere by the Trust.

[4] Annualized.