Fair Value of Ethereum - Changes in Quantity of ETH and Respective Fair Value (Details) $ in Thousands	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2022 USD ($) Ethereum	Jun. 30, 2021 USD ($)	Jun. 30, 2022 USD ($) Ethereum	Jun. 30, 2021 USD ($) Ethereum	Dec. 31, 2021 USD ($) Ethereum
Fair Value Disclosures [Abstract]
Investment Owned ,Balance | Ethereum			3,114,532.09753906	2,937,122.40311770	2,937,122.40311770
ETH contributed | Ethereum			0		255,555.46585612
ETH distributed for Sponsor's Fee, related party | Ethereum			(38,374.61769221)		(78,145.77143476)
Investment Owned ,Balance | Ethereum	3,076,157.47984685		3,076,157.47984685		3,114,532.09753906
Investment Owned, at Fair Value			$ 11,351,691	$ 2,188,127	$ 2,188,127
ETH contributed			0		434,615
ETH distributed for Sponsor's Fee, related party			(98,957)		(217,445)
Net change in unrealized (depreciation) appreciation on investment in Ethereum	$ (7,020,891)	$ 1,055,804	(8,198,749)	4,470,179	8,760,878
Net realized gain on investment in Ethereum	34,658	$ 42,803	82,834	$ 65,026	185,516
Investment Owned, at Fair Value	$ 3,136,819		$ 3,136,819		$ 11,351,691