3.25.0.1 html 12 149 1 true 3 0 false 5 false false R1.htm 000 - Document - Document And Entity Information Sheet http://www.ishares.com/20241231/role/statement-document-and-entity-information Document And Entity Information Cover 1 false false R2.htm 001 - Statement - Statement of Assets and Liabilities Sheet http://www.ishares.com/20241231/role/statement-statement-of-assets-and-liabilities Statement of Assets and Liabilities Statements 2 false false R3.htm 002 - Statement - Statement of Assets and Liabilities (Parentheticals) Sheet http://www.ishares.com/20241231/role/statement-statement-of-assets-and-liabilities-parentheticals Statement of Assets and Liabilities (Parentheticals) Statements 3 false false R4.htm 003 - Statement - Statement of Operations Sheet http://www.ishares.com/20241231/role/statement-statement-of-operations Statement of Operations Statements 4 false false R5.htm 004 - Statement - Statement of Operations (Parentheticals) Sheet http://www.ishares.com/20241231/role/statement-statement-of-operations-parentheticals Statement of Operations (Parentheticals) Statements 5 false false R6.htm 005 - Statement - Statement of Changes in Net Assets Sheet http://www.ishares.com/20241231/role/statement-statement-of-changes-in-net-assets Statement of Changes in Net Assets Statements 6 false false R7.htm 006 - Statement - Statement of Cash Flows Sheet http://www.ishares.com/20241231/role/statement-statement-of-cash-flows Statement of Cash Flows Statements 7 false false R8.htm 995445 - Disclosure - Insider Trading Arrangements Sheet http://xbrl.sec.gov/ecd/role/InsiderTradingArrangements Insider Trading Arrangements Notes 8 false false R9.htm 995550 - Disclosure - Cybersecurity Risk Management and Strategy Disclosure Sheet http://xbrl.sec.gov/cyd/role/CybersecurityRiskManagementAndStrategyDisclosure Cybersecurity Risk Management and Strategy Disclosure Notes 9 false false R10.htm 995553 - Disclosure - Schedule of Investments Sheet http://www.ishares.com/20241231/role/statement-schedule-of-investments Schedule of Investments Notes 10 false false R11.htm 995554 - Disclosure - Note 1 - Organization Sheet http://www.ishares.com/20241231/role/statement-note-1-organization Note 1 - Organization Notes 11 false false R12.htm 995555 - Disclosure - Note 2 - Significant Accounting Policies Sheet http://www.ishares.com/20241231/role/statement-note-2-significant-accounting-policies Note 2 - Significant Accounting Policies Notes 12 false false R13.htm 995556 - Disclosure - Note 3 - Trust Expenses Sheet http://www.ishares.com/20241231/role/statement-note-3-trust-expenses Note 3 - Trust Expenses Notes 13 false false R14.htm 995557 - Disclosure - Note 4 - Related Parties Sheet http://www.ishares.com/20241231/role/statement-note-4-related-parties Note 4 - Related Parties Notes 14 false false R15.htm 995558 - Disclosure - Note 5 - Indemnification Sheet http://www.ishares.com/20241231/role/statement-note-5-indemnification Note 5 - Indemnification Notes 15 false false R16.htm 995559 - Disclosure - Note 6 - Commitments and Contingent Liabilities Sheet http://www.ishares.com/20241231/role/statement-note-6-commitments-and-contingent-liabilities Note 6 - Commitments and Contingent Liabilities Notes 16 false false R17.htm 995560 - Disclosure - Note 7 - Concentration Risk Sheet http://www.ishares.com/20241231/role/statement-note-7-concentration-risk Note 7 - Concentration Risk Notes 17 false false R18.htm 995561 - Disclosure - Note 8 - Financial Highlights Sheet http://www.ishares.com/20241231/role/statement-note-8-financial-highlights Note 8 - Financial Highlights Notes 18 false false R19.htm 995562 - Disclosure - Note 9 - Investment Valuation Sheet http://www.ishares.com/20241231/role/statement-note-9-investment-valuation Note 9 - Investment Valuation Notes 19 false false R20.htm 995563 - Disclosure - Significant Accounting Policies (Policies) Sheet http://www.ishares.com/20241231/role/statement-significant-accounting-policies-policies Significant Accounting Policies (Policies) Policies http://www.ishares.com/20241231/role/statement-note-2-significant-accounting-policies 20 false false R21.htm 995564 - Disclosure - Schedule of Investments (Tables) Sheet http://www.ishares.com/20241231/role/statement-schedule-of-investments-tables Schedule of Investments (Tables) Tables http://www.ishares.com/20241231/role/statement-schedule-of-investments 21 false false R22.htm 995565 - Disclosure - Note 2 - Significant Accounting Policies (Tables) Sheet http://www.ishares.com/20241231/role/statement-note-2-significant-accounting-policies-tables Note 2 - Significant Accounting Policies (Tables) Tables http://www.ishares.com/20241231/role/statement-note-2-significant-accounting-policies 22 false false R23.htm 995566 - Disclosure - Note 8 - Financial Highlights (Tables) Sheet http://www.ishares.com/20241231/role/statement-note-8-financial-highlights-tables Note 8 - Financial Highlights (Tables) Tables http://www.ishares.com/20241231/role/statement-note-8-financial-highlights 23 false false R24.htm 995567 - Disclosure - Schedule of Investments - Investments (Details) Sheet http://www.ishares.com/20241231/role/statement-schedule-of-investments-investments-details Schedule of Investments - Investments (Details) Details 24 false false R25.htm 995568 - Disclosure - Schedule of Investments - Investments (Details) (Parentheticals) Sheet http://www.ishares.com/20241231/role/statement-schedule-of-investments-investments-details-parentheticals Schedule of Investments - Investments (Details) (Parentheticals) Details 25 false false R26.htm 995569 - Disclosure - Note 1 - Organization (Details Textual) Sheet http://www.ishares.com/20241231/role/statement-note-1-organization-details-textual Note 1 - Organization (Details Textual) Details http://www.ishares.com/20241231/role/statement-note-1-organization 26 false false R27.htm 995570 - Disclosure - Note 2 - Significant Accounting Policies (Details Textual) Sheet http://www.ishares.com/20241231/role/statement-note-2-significant-accounting-policies-details-textual Note 2 - Significant Accounting Policies (Details Textual) Details http://www.ishares.com/20241231/role/statement-note-2-significant-accounting-policies-tables 27 false false R28.htm 995571 - Disclosure - Note 2 - Significant Accounting Policies - Activity in Ether (Details) Sheet http://www.ishares.com/20241231/role/statement-note-2-significant-accounting-policies-activity-in-ether-details Note 2 - Significant Accounting Policies - Activity in Ether (Details) Details 28 false false R29.htm 995572 - Disclosure - Note 2 - Significant Accounting Policies - Share Activity (Details) Sheet http://www.ishares.com/20241231/role/statement-note-2-significant-accounting-policies-share-activity-details Note 2 - Significant Accounting Policies - Share Activity (Details) Details 29 false false R30.htm 995573 - Disclosure - Note 3 - Trust Expenses (Details Textual) Sheet http://www.ishares.com/20241231/role/statement-note-3-trust-expenses-details-textual Note 3 - Trust Expenses (Details Textual) Details http://www.ishares.com/20241231/role/statement-note-3-trust-expenses 30 false false R31.htm 995574 - Disclosure - Note 8 - Financial Highlights (Details Textual) Sheet http://www.ishares.com/20241231/role/statement-note-8-financial-highlights-details-textual Note 8 - Financial Highlights (Details Textual) Details http://www.ishares.com/20241231/role/statement-note-8-financial-highlights-tables 31 false false R32.htm 995575 - Disclosure - Note 8 - Financial Highlights - Financial Highlights (Details) Sheet http://www.ishares.com/20241231/role/statement-note-8-financial-highlights-financial-highlights-details Note 8 - Financial Highlights - Financial Highlights (Details) Details 32 false false All Reports Book All Reports etha-20241231.xsd etha-20241231_cal.xml etha-20241231_def.xml etha-20241231_lab.xml etha-20241231_pre.xml iset20241231_10k.htm iset20241231_10kimg001.jpg http://fasb.org/us-gaap/2024 http://xbrl.sec.gov/cyd/2024 http://xbrl.sec.gov/dei/2024 http://xbrl.sec.gov/ecd/2024 true true