Note 1 - Organization	12 Months Ended
Dec. 31, 2024
Notes to Financial Statements
Business Description and Basis of Presentation [Text Block]	1 - Organization The iShares Ethereum Trust ETF (the “Trust”) was organized on November 9, 2023 as a Delaware statutory trust. The trustee is BlackRock Fund Advisors (the “Trustee”), which is responsible for the day-to-day administration of the Trust. The Trust’s sponsor is iShares Delaware Trust Sponsor LLC, a Delaware limited liability company (the “Sponsor”). The Bank of New York Mellon serves as the “Trust Administrator.” The Trust is governed by the provisions of the Second Amended and Restated Trust Agreement (the “Trust Agreement”) executed by the Sponsor, the Trustee and Wilmington Trust, National Association, a national association (“Delaware Trustee”), as of July 3, 2024. The Trust issues units of beneficial interest (“Shares”) representing fractional undivided beneficial interests in its net assets. On May 21, 2024, BlackRock Financial Management, Inc. (“Seed Capital Investor”) purchased 400,000 Shares for $10,000,000 at a per-Share price of $25.00 (the “Seed Creation Baskets”). The Seed Capital Investor did not receive from the Trust, the Sponsor or any of their affiliates any fee or other compensation in connection with the purchase of Seed Creation Baskets. On June 24, 2024, the Trust purchased approximately 3,031 ether with the proceeds of the Seed Creation Baskets using Coinbase Inc. (the “Prime Execution Agent”). The costs incurred in connection with the purchase of ether with the proceeds of the Seed Creation Baskets were borne by the Trust. Sponsor’s fee started accruing daily at an annualized rate equal to 0.25% of the net asset value of the Trust on June 24, 2024. The Trust’s registration statement on Form S-1 relating to its continuous public offering of Shares was declared effective by the Securities and Exchange Commission (“SEC”) on July 22, 2024 (Effective Date) and the Shares were listed on The Nasdaq Stock Market LLC (“NASDAQ”) on July 23, 2024. The Trust seeks to reflect generally the performance of the price of ether. The Trust seeks to reflect such performance before payment of the Trust’s expenses and liabilities. The Shares are intended to constitute a simple means of making an investment similar to an investment in ether. The Trust qualifies as an investment company solely for accounting purposes and not for any other purpose and follows the accounting and reporting guidance under the Financial Accounting Standards Board Accounting Standards Codification Topic 946, Financial Services - Investment Companies, but is not registered, and is not required to be registered, as an investment company under the Investment Company Act of 1940, as amended.

Note 1 - Organization

12 Months Ended

Dec. 31, 2024

Business Description and Basis of Presentation [Text Block]

1 - Organization

The iShares Ethereum Trust ETF (the “Trust”) was organized on November 9, 2023 as a Delaware statutory trust. The trustee is BlackRock Fund Advisors (the “Trustee”), which is responsible for the day-to-day administration of the Trust. The Trust’s sponsor is iShares Delaware Trust Sponsor LLC, a Delaware limited liability company (the “Sponsor”). The Bank of New York Mellon serves as the “Trust Administrator.” The Trust is governed by the provisions of the Second Amended and Restated Trust Agreement (the “Trust Agreement”) executed by the Sponsor, the Trustee and Wilmington Trust, National Association, a national association (“Delaware Trustee”), as of July 3, 2024. The Trust issues units of beneficial interest (“Shares”) representing fractional undivided beneficial interests in its net assets.

On May 21, 2024, BlackRock Financial Management, Inc. (“Seed Capital Investor”) purchased 400,000 Shares for $10,000,000 at a per-Share price of $25.00 (the “Seed Creation Baskets”). The Seed Capital Investor did not receive from the Trust, the Sponsor or any of their affiliates any fee or other compensation in connection with the purchase of Seed Creation Baskets. On June 24, 2024, the Trust purchased approximately 3,031 ether with the proceeds of the Seed Creation Baskets using Coinbase Inc. (the “Prime Execution Agent”). The costs incurred in connection with the purchase of ether with the proceeds of the Seed Creation Baskets were borne by the Trust. Sponsor’s fee started accruing daily at an annualized rate equal to 0.25% of the net asset value of the Trust on June 24, 2024.

The Trust’s registration statement on Form S-1 relating to its continuous public offering of Shares was declared effective by the Securities and Exchange Commission (“SEC”) on July 22, 2024 (Effective Date) and the Shares were listed on The Nasdaq Stock Market LLC (“NASDAQ”) on July 23, 2024.

The Trust seeks to reflect generally the performance of the price of ether. The Trust seeks to reflect such performance before payment of the Trust’s expenses and liabilities. The Shares are intended to constitute a simple means of making an investment similar to an investment in ether.

The Trust qualifies as an investment company solely for accounting purposes and not for any other purpose and follows the accounting and reporting guidance under the Financial Accounting Standards Board Accounting Standards Codification Topic 946, Financial Services - Investment Companies, but is not registered, and is not required to be registered, as an investment company under the Investment Company Act of 1940, as amended.