Significant Accounting Policies - Summary of Trust's Assets Accounted at Fair Value (Details) - USD ($) $ in Thousands	Sep. 30, 2024		Jul. 21, 2024
Assets
Investment in ether, at fair value	$ 259,851	[1]	$ 0
Level 1
Assets
Investment in ether, at fair value	259,851
Level 2
Assets
Investment in ether, at fair value	0
Level 3
Assets
Investment in ether, at fair value	$ 0

[1] No comparative period presented as the Trust commenced operations on July 22, 2024.