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Fair Value of Ether - Schedule of Changes in Quality of Ether and Fair Value (Details)
 3 Months Ended 5 Months Ended 9 Months Ended
Sep. 30, 2025
USD ($)
Sep. 30, 2024
USD ($)
Sep. 30, 2024
USD ($)
Sep. 30, 2025
USD ($)
Fair Value of Ether [Abstract]        
Beginning balance, Quantity of Ether 9,142.2874 100 5,050
Beginning balance, Fair Value $ 23,004,189 $ 342,300 $ 16,869,879
Ether purchased, Quantity of Ether 13,283.5236 4,750 4,850 20,430.972
Ether purchased, Fair Value $ 53,651,474 $ 15,464,294 $ 15,805,033 $ 68,863,151
Ether sold, Quantity of Ether (11,391.3532) (14,446.5142)
Ether sold, Fair Value $ (47,718,601) $ (53,408,140)
Net realized gain (loss) on investment in ether sold to pay Sponsor fee
Net realized gain (loss) on investment in ether sold to pay Sponsor fee $ 913 $ 593
Net realized gain (loss) on investment in ether sold for redemptions
Net realized gain (loss) on investment in ether sold for redemptions $ 12,602,477 $ 9,126,375
Change in unrealized appreciation (depreciation) on investment in ether
Change in unrealized appreciation (depreciation) on investment in ether $ 4,375,913 $ (3,223,608) $ (3,222,047) $ 4,464,507
Ending balance, Quantity of Ether 11,034.4578 4,850 4,850 11,034.4578
Ending balance, Fair Value $ 45,916,365 $ 12,582,986 $ 12,582,986 $ 45,916,365