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Investments in Ether - Summary of Transactions and Earnings from Investments in Ether (Details) - USD ($)
 3 Months Ended 9 Months Ended
Sep. 30, 2025
Sep. 30, 2024
Sep. 30, 2024
Sep. 30, 2025
Schedule of Investments [Line Items]        
Opening Balance $ 22,654,462 $ 0 $ 0 $ 23,569,250
Purchases at Cost 26,960,641 23,895,889 23,895,889 33,385,860
Proceeds from Sales to Pay Sponsor Fee (19,041) (3,378) (3,378) (44,355)
Proceeds from ether sold for Redemptions (24,756,333) (0) 0 (26,207,244)
Change in Unrealized Appreciation (Depreciation) 13,721,224 (3,514,876) (3,514,876) 8,719,299
Net Realized (Gain) Loss from Investments in Ether Sold to pay Sponsor Fee (1,438) (1,455) (1,455) (9,240)
Net Realized (Gain) Loss on Investments in Ether Sold for Redemptions 437,856 0 0 (416,199)
Ending Balance $ 38,997,371 $ 20,376,180 $ 20,376,180 $ 38,997,371