Note 2 - Significant Accounting Policies - Activity in Ether (Details)			7 Months Ended
		Jun. 24, 2024	Dec. 31, 2024 USD ($)
Beginning balance			0
Beginning balance, average cost			$ 0
Beginning balance, fair value			$ 0
Ether purchased		3,031	1,118,503
Ether purchased, average cost			$ 3,695,230,461
Ether purchased, fair value			$ 3,695,230,461
Ether sold for the redemption of shares			(46,952)
Ether sold for the redemption of shares, average cost			$ (150,918,814)
Ether sold for the redemption of shares, fair value			(158,481,171)
Ether sold for the redemption of shares, realized gain (loss)			$ 7,562,357
Ether sold to pay expenses			(136)
Ether sold to pay expenses, average cost			$ (409,372)
Ether sold to pay expenses, fair value			(387,302)
Ether sold to pay expenses, realized gain (loss)			(22,070)
Net realized gain, fair value	[1]		7,540,287
Net change in unrealized appreciation/depreciation, fair value			$ 27,767,502
Ending balance			1,071,415
Ending balance, average cost			$ 3,543,902,275
Ending balance, fair value	[2]		3,571,669,777
Ending balance, realized gain (loss)	[1]		$ 7,540,287

[1] Includes $13,225,392 of realized gains and $(5,685,105) of realized losses.

[2] Cost of investment in ether: $3,543,902,275.