Statement of Changes in Net Assets - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2026	Mar. 31, 2025
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest [Abstract]
Net investment loss	$ (139)	$ (93)
Net realized gain (loss) on investment in ether transferred to pay Sponsor Fee	54	2
Net realized gain (loss) on In-Kind Redemptions of ether	868	0
Net realized gain (loss) on investment in ether sold for redemptions	(38,498)	(13,641)
Net change in unrealized (appreciation) depreciation on investment in ether	(72,844)	(136,196)
Net increase (decrease) in net assets resulting from operations	(110,559)	(149,928)
Increase (decrease) in net assets from capital share transactions
Creations for Shares issued	103,815	23,177
Redemptions for Shares redeemed	(117,713)	(104,016)
Net increase (decrease) in net assets resulting from capital share transactions	(13,898)	(80,839)
Total increase (decrease) in net assets from operations and capital share transactions	(124,457)	(230,767)
Net assets
Beginning of period	343,685	404,529
End of period	$ 219,228	$ 173,762
Increase (Decrease) in Partners' Capital [Roll Forward]
Shares issued	5,240,000	1,100,000
Shares redeemed	(6,770,000)	(4,720,000)
Net increase (decrease) in Shares issued and outstanding	(1,530,000)	(3,620,000)