Fair Value of Ether - Schedule of Changes in Quantity of Ether and Fair Value (Details) $ in Thousands	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2026 USD ($) Ether	Jun. 30, 2025 USD ($)	Jun. 30, 2026 USD ($) Ether	Jun. 30, 2025 USD ($) Ether	Dec. 31, 2025 USD ($) Ether
Fair Value Disclosures [Abstract]
Beginning balance \| Ether			115,663.9141	121,101.8582	121,101.8582
Purchases \| Ether			45,314.6338		156,792.8617
In-Kind Redemptions \| Ether			(2,504.9565)
Sales for the redemption of Shares \| Ether			(51,612.9369)		(162,038.8128)
Ether transferred for Sponsor Fee \| Ether			(118.4981)		(191.993)
Ending balance \| Ether	106,742.1564		106,742.1564		115,663.9141
Beginning balance			$ 343,746	$ 404,529	$ 404,529
Purchases			119,880		576,881
In-Kind Redemptions			(5,123)
Sales for the redemption of Shares			(124,611)		(582,989)
Ether transferred for Sponsor Fee			(279)		(599)
Net realized gain (loss) from investment in ether transferred to pay Sponsor Fee			78		249
Net realized gain (loss) from In-Kind Redemptions of ether			868
Net realized gain (loss) from investment in ether sold for redemptions	$ (6,838)	$ (16,707)	(45,336)	(30,348)	(54,632)
Change in unrealized appreciation (depreciation) from investment in ether	(47,883)	$ 78,679	(120,727)	$ (57,517)	307
Ending balance	$ 168,496		$ 168,496		$ 343,746