Fair Value of Ether - Schedule of Changes in Quantity of Ether and Fair Value (Details) $ in Thousands	3 Months Ended		5 Months Ended	6 Months Ended
	Jun. 30, 2025 USD ($) Ether		Dec. 31, 2024 USD ($) Ether	Jun. 30, 2025 USD ($) Ether
Fair Value Disclosures [Abstract]
Beginning balance | Ether			0	121,101.8582
Purchases | Ether			136,813.5326	28,466.2256
Sales for the redemption of Shares | Ether			(15,711.6744)	(42,608.0846)
Ether transferred for Sponsor Fee | Ether				(70.995)
Ending balance | Ether	106,889.0042		121,101.8582	106,889.0042
Beginning balance			$ 0	$ 404,529
Purchases			453,518	70,334
Sales for the redemption of Shares			(49,804)	(117,897)
Ether transferred for Sponsor Fee				(155)
Net realized gain (loss) on investment in ether transferred to pay Sponsor Fee				11
Net realized gain (loss) on investment in ether sold for redemptions	$ (16,707)	[1]	(9,412)	(30,348)	[1]
Change in unrealized appreciation (depreciation) on investment in ether	78,679	[1]	10,227	(57,517)	[1]
Ending balance	$ 268,957		$ 404,529	$ 268,957

[1] No comparative financial statements have been provided as the Trust’s operations commenced on July 22, 2024.