Statement of Assets and Liabilities (Parenthetical) - USD ($) $ in Thousands	6 Months Ended	12 Months Ended
	Jun. 30, 2025	Dec. 31, 2024
Statement of Financial Position [Abstract]
Investment in ether, at cost	$ 316,247	$ 394,302
Common stock, no par value	$ 0	$ 0
Common Stock, Shares Authorized, Unlimited [Fixed List]	Unlimited	Unlimited