Total assets Total liabilities Net assets Beginning of period End of period Net Assets, Fair Value Total expenses Net realized loss from investment in ether Net realized loss and change in unrealized appreciation (depreciation) Net increase in net assets resulting from operations Total capital share transactions Net increase in net assets Fair Value Hierarchy and NAV [Axis] Balance, Shares, beginning of period (in Ether) Balance, Shares, end of period (in Ether) Balance, beginning of period Balance, end of period Fair Value Investment Owned, Fair Value Measurement Input Type [Axis] Beginning of period, Shares Ending of period, Shares Shares outstanding (no par value, unlimited amount authorized) (in Shares) Beginning of period, Amount Ending of period, Amount Net asset value per share, beginning of period Net asset value per share, end of period Net Asset Value per Share (in Dollars per share) Total return (%) Assets Investment in ether, at fair value (cost $136,234,086) Investment in ETH Investment in Ether, cost Cost Liabilities Shares issued and outstanding (no par value, unlimited amount authorized) (in Shares) Share par value Shares authorized Expenses Sponsor fee, related party Net expenses Net investment income (loss) Net investment loss Net realized loss and change in unrealized appreciation (depreciation) Net realized loss on: Net change in unrealized appreciation (depreciation) on investment in ether Net increase from operations Net realized gain (loss) from investment in ether Change in net unrealized appreciation (depreciation) from investments in ether Net unrealized appreciation on investment in ETH Capital Share transactions Net assets: Quantity of Ether (in Ether) % of Net Assets Net Assets, % of Net Assets Investment Owned, Net Assets, Percentage Sponsor fee waiver, related party Ether sold for redemption of shares Contributions for shares issued Withdrawals for shares redeemed Organization, Consolidation and Presentation of Financial Statements Disclosure [Text Block] Significant Accounting Policies [Text Block] Fair Value, Assets Measured on Recurring Basis [Table Text Block] Assets Changes In Quantity of Ether and the Respective Fair Value [Table Test Block] ETH contributed, Shares (in Ether) ETH contributed ETH contributed ETH withdrawn, Shares (in Ether) ETH withdrawn Net unrealized appreciation on investment in ETH, Shares (in Shares) Net realized loss on investment in ETH, Shares (in Shares) Net realized loss on investment in ETH Trust Expenses and Other Agreements [Text Block] Related Party Transactions Disclosure [Text Block] Equity [Text Block] Schedule of Stockholders Equity [Table Text Block] Shares issued, Shares Shares issued, Amount Shares redeemed, Amount Commitments and Contingencies Disclosure [Text Block] Concentration Risk Disclosure [Text Block] Investment Company, Financial Highlights [Text Block] Investment Company, Financial Highlights [Table Text Block] From investment operations: Net investment income (loss) Net realized gain (loss) and change in unrealized appreciation/depreciation on investments in ether Net decrease resulting from operations Ratios to average net assets(f) Expenses before fee waiver Expenses after fee waiver Net investment income (loss) Portfolio turnover rate Subsequent Events [Text Block] Shares redeemed, Shares Stock Redeemed or Called During Period, Shares Fair Value, Inputs, Level 1 [Member] Fair Value, Inputs, Level 2 [Member] Fair Value, Inputs, Level 3 [Member] Quantity of Ether [Member] Fair Value [Member] Ownership [Axis] Accounting Policies [Abstract] Cybersecurity Risk Management Expertise of Management Responsible [Text Block] Cybersecurity Risk Third Party Oversight and Identification Processes [Flag] Cybersecurity Risk Management Third Party Engaged [Flag] Cybersecurity Risk Role of Management [Text Block] Cybersecurity Risk Materially Affected or Reasonably Likely to Materially Affect Registrant [Text Block] Cybersecurity Risk Materially Affected or Reasonably Likely to Materially Affect Registrant [Flag] Sponsor Fee Terms Shares, Issued Shares Issued, Price Per Share Proceeds from Sale of Other Assets Subsidiary, Ownership Percentage, Parent Temporary Equity, Shares Authorized Subsequent Event, Description Basis of Accounting, Policy [Policy Text Block] Cash and Cash Equivalents, Policy [Policy Text Block] Investment Valuation, Policy [Policy Text Block] Ether, Policy [Policy Text Block] Calculation Of Net Asset Value, Policy [Policy Text Block] Income Tax, Policy [Policy Text Block] Segment Reporting, Policy [Policy Text Block] Seed Capital Investor [Member] ETH Custodian [Member] Additional ETH Custodian [Member] Fair Value Hierarchy and NAV [Domain] Significant Accounting Policies - Schedule of the Fair Value Hierarchy (Details) [Table] Significant Accounting Policies - Schedule of the Fair Value Hierarchy (Details) [Line Items] Measurement Input Type [Domain] Significant Accounting Policies - Schedule of Changes in Quantity of Ether (Details) [Table] Significant Accounting Policies - Schedule of Changes in Quantity of Ether (Details) [Line Items] Cybersecurity Risk Management, Strategy, and Governance [Table] Cybersecurity Risk Management, Strategy, and Governance [Line Items] Ownership [Domain] Related Parties (Details) [Table] Related Parties (Details) [Line Items] Concentration Risk (Details) [Table] Concentration Risk (Details) [Line Items] Disclosure of calculation of net asset value. This refers to the amount of Ether (in shares or $$) withdrawn. This value shows the amount of Ether withdrawn. Disclosure of ether. Investment Valuation, Policy [Policy Text Block] Percentage of net assets. Amount of net realized gain loss and unrealized appreciation depreciation. Net realized loss on investment in ETH Net realized loss on investment in ETH, Shares Net unrealized appreciation on investment in ETH, Shares Amount received from capital withdrawals. Amount of Ether in units and cost For trust expenses and other agreements Sponsor fee waiver, related party Amount of capital share transactions. Disclosure of trust expenses and other agreements. Cybersecurity Risk Management Expertise of Management Responsible [Text Block] Related Party Transactions [Abstract] Assets [Abstract] Proceeds From Capital Withdrawals Segment Reporting, Policy [Policy Text Block] Investment Company, Expense Ratio, after Fee Waiver and before Incentive Fee Deduction Statement of Cash Flows [Abstract] Gain (Loss) on Investments Cybersecurity Risk Role of Management [Text Block] Fair Value, Inputs, Level 3 [Member] Net Unrealized Appreciation On Investment In ETHShares Net Assetsof Percentage Investment Company, Investment Income (Loss) Ratio Sponsor Fee Terms ETHContributed Fair Value Related Party Transactions Disclosure [Text Block] Fair Value, Assets Measured on Recurring Basis [Table Text Block] ETHCustodian Member Sponsor Fee Waiver Quantity Of Ether Member Investment Company, Financial Highlights [Abstract] Investment Valuation Policy Policy Text Block Capital Share Transactions Abstract Net Realized Loss On Abstract Stock Issued During Period, Value, New Issues Cybersecurity Risk Third Party Oversight and Identification Processes [Flag] Cybersecurity Risk Materially Affected or Reasonably Likely to Materially Affect Registrant [Flag] Basis of Accounting, Policy [Policy Text Block] Common Stock, Value, Outstanding Temporary Equity, Shares Authorized Increase (Decrease) in Operating Assets Cybersecurity Risk Materially Affected or Reasonably Likely to Materially Affect Registrant [Text Block] Quantityof Etherin Ether Concentration Risk Disclosure [Text Block] Fair Value, Inputs, Level 1 [Member] Net Change In Unrealized Appreciation On Investment In Ether Income Statement [Abstract] Stock Issued During Period, Shares, New Issues Schedule Of The Fair Value Hierarchy Abstract Schedule Of Share And Capital Activity Abstract Schedule Of Financial Highlights Abstract Realized Investment Gains (Losses) Trust Expenses And Other Agreements Text Block Trust Expenses And Other Agreements Abstract Net Realized Loss On Investment In ETH Cybersecurity Risk Management Third Party Engaged [Flag] Investment Company, Expense Ratio, after Fee Waiver and Incentive Fee Deduction Net Realized Gainloss And Unrealized Appreciationdepreciation Portion at Fair Value Measurement [Member] Net Realized Loss On Investment In ETHShares Assets Abstract0 Proceeds from Contributed Capital Assets Liabilities Expenses Abstract Net Asset Value Per Share Subsequent Event, Description Cash and Cash Equivalents, Policy [Policy Text Block] Schedule Of Changes In Quantity Of Ether Abstract Subsequent Events [Text Block] Calculation Of Net Asset Value Policy Text Block Common Stock, Shares, Issued Ether Sold For Redemption Of Shares Investment Owned, Fair Value Common Stock, Shares, Outstanding Schedule of Stockholders Equity [Table Text Block] Organization, Consolidation and Presentation of Financial Statements Disclosure [Text Block] Risks and Uncertainties [Abstract] Shares, Issued Quantity Of Ether Seed Capital Investor Member Stock Redeemed or Called During Period, Shares Net Investment Income Net Increase From Operations Abstract From Investment Operations Abstract Investment Company, Investment Income (Loss) from Operations, Per Share Net Assets Net Realized Gain And Change In Unrealized Appreciationdepreciation On Investments In Ether Equity [Text Block] Common Stock, No Par Value Fair Value, Inputs, Level 2 [Member] Schedule Of Investment Abstract Total Capital Share Transactions ETHContributed Income Tax, Policy [Policy Text Block] Investment Company, Total Return Subsequent Events [Abstract] Operating Expenses Statement of Financial Position [Abstract] Investment Company, Portfolio Turnover Investment Owned, Cost Common Stock, Shares Authorized, Unlimited [Fixed List] Subsidiary, Ownership Percentage, Parent Increase (Decrease) in Operating Capital Investment Company, Gain (Loss) on Investment, Per Share Shares Issued, Price Per Share Net Realized Loss And Change In Unrealized Appreciation Depreciation Abstract Ratios To Average Net Assets FAbstract Additional ETHCustodian Member Sponsor Fees Commitments and Contingencies Disclosure [Text Block] Investment Company, Financial Highlights [Table Text Block] ETHWithdrawn Fair Value Commitments and Contingencies Disclosure [Abstract] Unrealized Gain (Loss) on Investments Ether Policy Text Block Investment Owned, Net Assets, Percentage