Fair Value of Ether - Additional Information (Details)	3 Months Ended	12 Months Ended
	Mar. 31, 2025 USD ($) Ether $ / shares	Dec. 31, 2024 USD ($) Ether $ / shares	Jul. 21, 2024 USD ($) Ether
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Trust held net closing balance of ether | Ether	95,108.4265	121,101.8582	0
Investment in ether, at fair value	$ 173,794,000	$ 404,529,000	$ 0
CME CF Ether
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Investment in ether, at fair value	$ 174,674,234	$ 405,188,652
Ether index price per share | $ / shares	$ 1,836.58	$ 3,345.85
Lukka Prime Rate
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Investment in ether, at fair value	$ 173,794,481	$ 404,528,647
Ether index price per share | $ / shares	$ 1,827.33	$ 3,340.4