75000 - Document - Document and Entity Information link:presentationLink link:calculationLink link:definitionLink 75010 - Statement - STATEMENTS OF ASSETS AND LIABILITIES (UNAUDITED) link:presentationLink link:calculationLink link:definitionLink 75020 - Statement - STATEMENTS OF ASSETS AND LIABILITIES (UNAUDITED) 2 link:presentationLink link:calculationLink link:definitionLink 75030 - Statement - STATEMENTS OF ASSETS AND LIABILITIES (UNAUDITED) (Parenthetical) link:presentationLink link:calculationLink link:definitionLink 75040 - Statement - SCHEDULES OF INVESTMENT (UNAUDITED) link:presentationLink link:calculationLink link:definitionLink 75050 - Statement - STATEMENTS OF OPERATIONS (UNAUDITED) link:presentationLink link:calculationLink link:definitionLink 75060 - Statement - STATEMENTS OF CHANGES IN NET ASSETS (UNAUDITED) link:presentationLink link:calculationLink link:definitionLink 995455 - Disclosure - Organization link:presentationLink link:calculationLink link:definitionLink 995465 - Disclosure - Summary of Significant Accounting Policies link:presentationLink link:calculationLink link:definitionLink 995475 - Disclosure - Fair Value of ZEN link:presentationLink link:calculationLink link:definitionLink 995485 - Disclosure - Creations and Redemptions of Shares link:presentationLink link:calculationLink link:definitionLink 995495 - Disclosure - Income Taxes link:presentationLink link:calculationLink link:definitionLink 995505 - Disclosure - Related Parties link:presentationLink link:calculationLink link:definitionLink 995515 - Disclosure - Concentration Risk link:presentationLink link:calculationLink link:definitionLink 995525 - Disclosure - Financial Highlights Per Share Performance link:presentationLink link:calculationLink link:definitionLink 995535 - Disclosure - Indemnifications link:presentationLink link:calculationLink link:definitionLink 995545 - Disclosure - Subsequent Events link:presentationLink link:calculationLink link:definitionLink 995555 - Disclosure - Summary of Significant Accounting Policies (Policies) link:presentationLink link:calculationLink link:definitionLink 995565 - Disclosure - Summary of Significant Accounting Policies (Tables) link:presentationLink link:calculationLink link:definitionLink 995575 - Disclosure - Fair Value of ZEN (Tables) link:presentationLink link:calculationLink link:definitionLink 995585 - Disclosure - Financial Highlights Per Share Performance (Tables) link:presentationLink link:calculationLink link:definitionLink 995595 - Disclosure - Organization - Additional Information (Detail) link:presentationLink link:calculationLink link:definitionLink 995605 - Disclosure - Summary of Significant Accounting Policies - Summary of Fair Value Estimates (Detail) link:presentationLink link:calculationLink link:definitionLink 995615 - Disclosure - Summary of Significant Accounting Policies - Additional Information (Details) link:presentationLink link:calculationLink link:definitionLink 995625 - Disclosure - Fair Value of ZEN - Additional Information (Detail) link:presentationLink link:calculationLink link:definitionLink 995635 - Disclosure - Fair Value of ZEN - Summary of changes in quantity of ZEN and respective fair value (Detail) link:presentationLink link:calculationLink link:definitionLink 995645 - Disclosure - Creations and Redemptions of Shares - Additional Information (Detail) link:presentationLink link:calculationLink link:definitionLink 995655 - Disclosure - Income Taxes - Additional Information (Detail) link:presentationLink link:calculationLink link:definitionLink 995665 - Disclosure - Related Parties - Additional Information (Detail) link:presentationLink link:calculationLink link:definitionLink 995675 - Disclosure - Financial Highlights Per Share Performance - Summary of Per Share Data (Detail) link:presentationLink link:calculationLink link:definitionLink 995685 - Disclosure - Subsequent Events - Additional Information (Detail) link:presentationLink link:calculationLink link:definitionLink Entity Incorporation, State or Country Code Increase (decrease) in net assets from operations and capital share transactions. Increase Decrease in Net Assets from Operations and Capital Share Transactions Total (decrease) increase in net assets from operations and capital share transactions Total decrease in net assets from operations and capital share transactions Fair Value Measurements, Recurring and Nonrecurring [Table Text Block] Summary of Fair Value Estimates Equity [Abstract] Entity Current Reporting Status Operating Expenses [Abstract] Expenses: Fair Value, Inputs, Level 2 [Member] Level 2 Summary of Per Share Data Investment Company, Financial Highlights [Table Text Block] Crypto Asset [Domain] Document Fiscal Period Focus Entity Shell Company Segment Reporting Segment Reporting, Policy [Policy Text Block] Net assets Net assets Beginning of period End of period Fair Value Fair Values Common Stock, Shares, Issued Shares issued, no par value (unlimited Shares authorized) Statement [Table] Investment Company, Investment Income (Loss) from Operations, Per Share Net decrease in net assets resulting from operations Statement [Line Items] Revenue from Contract with Customer [Policy Text Block] Investment Transactions and Revenue Recognition Entity Filer Category Investment Owned, Balance, Contracts Investment Owned, Balance, Contracts Investment Owned, Balance, Contracts Investment Owned, Balance, Contracts Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent U.S. Federal income tax rate Subsequent Event [Line Items] Additional Paid in Capital, Common Stock Paid-in-capital Investment owned, accumulated net change in unrecognized unrealized appreciation (depreciation), net. Investment Owned, Accumulated Net Change In Unrecognized Unrealized Appreciation (Depreciation), Net Accumulated net change in unrealized depreciation on investment in ZEN Accumulated net change in unrealized depreciation on investment in ZEN Significant Accounting Policies [Text Block] Summary of Significant Accounting Policies Concentration Risk Disclosure [Text Block] Concentration Risk Investment Company, Total Return Total return Crypto Assets Mining Number of Transactions Per Second Crypto Assets Mining Number of Transactions Per Second Number of transactions per second Accounting Standards Update [Axis] Entity Small Business ZEN contributed Investments owned new contributions. Investments Owned New Contributions LTC contributed Organization, Consolidation and Presentation of Financial Statements [Abstract] Amendment Flag Effective Income Tax Rate Reconciliation at Federal Statutory Income Tax Rate, Amount Reserves for uncertain tax positions related to federal taxes Entity Address, Postal Zip Code Segment Reporting, CODM, Profit (Loss) Measure, How Used, Description Accounting Standards Update and Change in Accounting Principle [Table] Accounting Standards Update 2023-08 [Member] Crypto Asset, Number of Units Crypto Asset, Number of Units, Total Number of units Entity Address, Address Line One Change in Accounting Principle, Accounting Standards Update, Immaterial Effect [true false] Number of incidental rights distributed in payment of sponsors fee. Number of Incidental Rights Distributed in Payment of Sponsors Fee Number of Incidental Rights distributed Fair Value Hierarchy and NAV [Axis] Investment Company, Investment Income (Loss) from Operations, Per Share [Abstract] Net decrease in net assets from investment operations: Investment Type [Axis] Document Type Subsidiary, Ownership Percentage, Parent Percentage of minority interest owned Net increase in Shares Stock Issued During Period, Shares, Period Increase (Decrease) Entity Central Index Key Subsequent Event Type [Domain] Investment in ZEN Investment in ZEN [Member] Investment in ZEN. Common Stock, Par or Stated Value Per Share Stock, par value Accounting Standards Update [Domain] Operating Costs and Expenses, Total Operating Costs and Expenses Sponsor's Fees Liabilities [Abstract] Liabilities: Horizen Foundation [Member Horizen Foundation [Member Horizen Foundation Indemnifications Disclosure [Abstract]. Indemnifications Disclosure [Abstract] Net realized loss on investment in ZEN Realized Investment Gains (Losses), Total Realized Investment Gains (Losses) Net realized loss on investment in ZEN Net realized loss on investment in ZEN Ownership [Domain] Current Fiscal Year End Date Accumulated net realized gain on investment in ZEN Accumulated net realized gain on investment. Accumulated Net Realized Gain On Investment Document Quarterly Report Entity Address, State or Province Investment Company, Investment Income (Loss) Ratio Net investment loss Risks and Uncertainties [Abstract] Effective Income Tax Rate Reconciliation, State and Local Income Taxes, Amount Reserves for uncertain tax positions related to state and local taxes Subsequent Event Subsequent Event [Member] Deferred Tax Liability Not Recognized, Amount of Unrecognized Deferred Tax Liability, Policyholders' Surplus Liability for unrecognized tax amount Sponsor Fees Sponsor's Fee, related party Fair Value, Inputs, Level 3 [Member] Level 3 Investment Company, Gain (Loss) on Investment, Per Share Net realized and unrealized loss Unrealized Gain (Loss) on Investments Net change in unrealized appreciation/depreciation on investment in ZEN Net change in unrealized appreciation/depreciation on investment in ZEN Investment [Member] Investment. Investment Related Party Transactions [Abstract] LTC contributed Investment Owned Balance Contracts New Contributions Investment Owned, Balance, Contracts New Contributions. ZEN contributed Horizen DAO [Member] Horizen DAO [Member] Horizen DAO Subsequent Events [Text Block] Subsequent Events Related Party Transactions Disclosure [Text Block] Related Parties DCG D C G [Member] D C G. Entity Address, Address Line Two Fair Value of ZEN Fair Value Disclosures [Text Block] Investment in ZEN Fair Value Investment Owned, at Fair Value Investment Owned, at Fair Value Investment in ZEN, at fair value (cost $17,830 and $18,053 as of June 30, 2026 and December 31, 2025, respectively) Net realized and unrealized loss from: Net Realized And Unrealized Gain Loss Net Realized And Unrealized Gain Loss [Abstract] Net realized and unrealized loss from: Investment owned balance contracts net change in unrealized depreciation appreciation. Investment Owned Balance Contracts Net Change in Unrealized Depreciation Appreciation Net change in unrealized appreciation/depreciation on investment in ZEN Segment Reporting, CODM, Individual Title and Position or Group Name [Extensible Enumeration] Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] Schedule Of Investments [Line Items] Schedule of Investments [Line Items] Related and Nonrelated Parties [Axis] Entity Address, City or Town Quantity of ZEN Quantity Of Horizen Quantity of horizen. Security Exchange Name Investment Owned, Cost Investment at fair value cost Cost Statistical Measurement [Domain] Document Period End Date Fair Value Hierarchy and NAV [Domain] Statement of Financial Position [Abstract] Related Party Transaction, Rate Related party sponsor fee percentage Liabilities Total liabilities Total liabilities Increase in Net Assets From Capital Share Transactions. Increase In Net Assets From Capital Share Transactions [Abstract] Decrease in net assets from capital share transactions: Securities Act File Number Entity File Number Cover [Abstract] Investments [Domain] Number of operating segment Number of Operating Segments Subsequent Event [Table] Schedule of Investments [Table] New Accounting Pronouncements, Policy [Policy Text Block] Recently Adopted/Issued Accounting Pronouncements Ownership [Axis] Investment, Type [Extensible Enumeration] Investment Holdings, Schedule of Investments [Table Text Block] Summary of Changes in Quantity of ZEN and Respective Fair Value Common Stock, Shares, Outstanding Shares outstanding, no par value (unlimited Shares authorized) Shares outstanding at end of period Shares outstanding at beginning of period Share represented as ZEN Common Share Equivalent Of Horizen Common share equivalent of horizen. Document Transition Report Number of incidental rights held. Number Of Incidental Rights Held Number of incidental rights held Schedule of Investments [Abstract] Stock Issued During Period, Value, New Issues Shares issued Shares issued Equity [Text Block] Creations and Redemptions of Shares Net decrease in net assets resulting from operations Non Sponsor Paid Expenses [Member] Non Sponsor Paid Expenses [Member] Non Sponsor Assets [Abstract] Assets: ZEN distributed for Sponsor's Fee, related party Investments owned distributions. Investments Owned Distributions LTC distributed for Sponsor's Fee, related party LTC distributed for Sponsor's Fee, related party Document Fiscal Year Focus Crypto Asset [Axis] Change in Shares outstanding: Change In Shares Outstanding [Abstract] Change in shares outstanding. Fair Value Measurement, Policy [Policy Text Block] Fair Value Measurement Fair Value Disclosures [Abstract] Investment Owned, Net Assets, Percentage Percent of Net Assets DCG DCG Member. DCG[Member] Investment Income, Net Net investment loss Net investment loss Net investment loss Related and Nonrelated Parties [Domain] Income Tax Disclosure [Text Block] Income Taxes Additional trust expenses paid by sponsor. Additional Trust Expenses Paid By Sponsor Additional trust expenses paid by sponsor VisaNet [Member] VisaNet [Member] VisaNet Income Tax Disclosure [Abstract] Fair Value, Recurring and Nonrecurring [Table] Common stock value, shares authorized Common stock value shares authorized. Amount of shares approved for purchase New Accounting Pronouncements or Change in Accounting Principle [Line Items] Change in Accounting Principle, Accounting Standards Update, Adoption Date Trading Symbol Related Party Transaction [Table] Subsequent Event Type [Axis] Investment Company, Financial Highlights [Abstract] Entity Ex Transition Period Accounts Payable, Total Accounts Payable Sponsor's Fee payable, related party Investment Company, Financial Highlights [Text Block] Financial Highlights Per Share Performance Investment Company, Investment Income (Loss), Per Share, Basic Net investment loss Investment Income, Net [Abstract] Investment income: Maximum Maximum [Member] Statistical Measurement [Axis] Related Party Transaction, Amounts of Transaction Related party maximum transaction in a fiscal year Investment Company, Financial Ratios [Abstract] Ratios to average net assets: Investment owned, balance, shares held by custodian. Investment Owned Balance Shares Held By Custodian Investment owned balance shares held by custodian Investment Company, Expense Ratio, after Fee Waiver and Incentive Fee Deduction Expenses Expenses Related Party Transaction [Line Items] Entity Registrant Name Investment Income. Investment Income Investment income Common Stock, Shares Held in Employee Trust, Shares Shares of the Trust, held by related parties Amount of the Trust, held by related parties Subsequent Events [Abstract] Investment Company [Abstract] Entity Common Stock, Shares Outstanding Stockholders' Equity, Period Increase (Decrease) Net increase in net assets resulting from capital share transactions Net increase in net assets resulting from capital share transactions Common stock held in employee trust under authorization. Common Stock Held In Employee Trust Under Authorization Number of shares purchased under authorization Subsequent Event, Date Subsequent events date Gain (Loss) on Investments Net realized and unrealized (loss) gain on investment Net realized and unrealized loss on investment Net Asset Value Per Share Principal Market NAV, beginning of period Principal Market NAV, end of period Principal Market NAV per Share Sponsor [Member]. Sponsor [Member] Sponsor Total assets Assets Total assets Income Statement [Abstract] Fair Value of Financial Instruments, Policy [Policy Text Block] Principal Market and Fair Value Determination Indemnifications Disclosure [Text Block]. Indemnifications Disclosure [Text Block] Indemnifications Stock Issued During Period, Shares, New Issues Shares issued Title of 12(g) Security City Area Code Net assets. Net Assets [Abstract] Net assets: Ethereum Network Ethereum Network [Member] Ethereum Network [Member] Crypto Asset, Number of Units Transferred Crypto asset, number of units transferred. Number of units transferred Investment Company, Financial Highlights [Roll Forward] Sponsor's Parent [Member]. Sponsor Parent [Member] Sponsor's Parent Common units issued minimum basket. Common Units Issued Minimum Basket Common units issued, minimum basket CoinbaseInc[Member] Coinbase Inc Coinbase Inc Member Fair Value, Inputs, Level 1 [Member] Level 1 Change in Accounting Principle, Accounting Standards Update, Adopted [true false] Minimum percentage of tax positions. Minimum Percentage Of Tax Positions Minimum percentage of tax positions Common Stock, Shares Held in Employee Trust Amount of the Trust, held by related parties Entity Interactive Data Current Net Income (Loss), Including Portion Attributable to Noncontrolling Interest [Abstract] Decrease in net assets from operations: Investment owned, balance, contracts distributed. Investment Owned Balance Contracts Distributed LTC distributed for Sponsor's Fee, related party ZEN distributed for Sponsor's Fee, related party Net realized loss on investment in ZEN Investment owned balance contracts net realized loss gain. Investment Owned Balance Contracts Net Realized Loss Gain Entity Tax Identification Number Horizen fair value per share Horizen Fair Value Per Share Horizen fair value per share Organization, Consolidation and Presentation of Financial Statements Disclosure [Text Block] Organization Local Phone Number Accumulated net investment loss. Accumulated Net Investment Loss Accumulated net investment loss Accumulated net investment loss Accounting Policies [Abstract] Common Stock, Shares Authorized, Unlimited [Fixed List] Common shares authorized Entity Emerging Growth Company Chief Executive Officer and Chief Financial Officer [Member] Chief executive officer and chief financial officer.