Significant Accounting Policies (Policies)	12 Months Ended
Significant Accounting Policies (Policies)	Dec. 31, 2024
Accounting Policies [Abstract]
Consolidation, Policy [Policy Text Block]	Principles of Consolidation The accompanying consolidated financial statements include the accounts of Ironstone Group, Inc. and its subsidiaries, AcadiEnergy, Inc., Belt Perry Associates, Inc., DeMoss Corporation, and TaxNet, Inc. (collectively the “Company”). All significant intercompany accounts and transactions have been eliminated in consolidation.
Investment, Policy [Policy Text Block]	Marketable and Non-Marketable Securities Marketable and non-marketable securities have been classified by management as available for sale in accordance with Financial Accounting Standards Board (“FASB”) Accounting Standards Codification (“ASC”) 320. Marketable securities are recorded at fair value and any unrealized gains and losses are excluded from earnings and reported as a separate component of shareholders’ equity until realized. The fair value of the Company’s marketable securities and investments at December 31, 2024 is based on quoted market prices. For the purpose of computing realized gains and losses, cost is identified on a specific identification basis. For marketable securities for which there is an other-than-temporary impairment, an impairment loss is recognized as a realized loss, and related adjustments are not made for recovery in value. Securities determined to be non-marketable by the Company do not have readily determinable fair values. The Company estimates the fair value of these instruments using various pricing models and the information available to the Company that it deems most relevant. Among the factors considered by the Company in determining the fair value of financial instruments are discounted anticipated cash flows, the cost, terms and liquidity of the instrument, the financial condition, operating results and credit ratings of the issuer or underlying company, the quoted market price of publicly traded securities with similar duration and yield, the Black-Scholes Options Valuation methodology adjusted for active market, the share price of recent round of financings by an outsider, and other considerations on a case-by-case basis and other factors generally pertinent to the valuation of financial instruments.
Use of Estimates, Policy [Policy Text Block]	Use of Estimates The preparation of financial statements in conformity with accounting principles generally accepted in the United States of America requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting period. Significant estimates made in the financial statements relate to the valuation of the Company’s non-marketable investments. Actual results could differ from those estimates.
Income Tax, Policy [Policy Text Block]	Income Taxes The Company and its wholly owned subsidiaries file a consolidated federal income tax return. Income taxes are provided for the tax effects of transactions reported in the financial statements and consist of taxes currently due plus deferred income taxes. Deferred income taxes are recognized for differences between the financial statement and tax bases of assets and liabilities that will result in taxable or deductible amounts in the future. Deferred income taxes are also recognized for net operating loss carryforwards that are available to offset future taxable income. Valuation allowances are established when necessary to reduce deferred tax assets to the amount expected to be realized. Ironstone follows the authoritative guidance on accounting for and disclosure of uncertainty in tax positions, which requires the Company to determine whether a tax position of Ironstone is more likely than not to be sustained upon examination, including resolution of any related appeals or litigation processes, based on the technical merits of the position. For tax positions meeting the more likely than not threshold, the tax amount recognized in the financial statements is reduced by the largest benefit that has a greater than 50% likelihood of being realized upon ultimate settlement with the relevant taxing authority. The Company has determined that there is no effect on the financial statements from this authoritative guidance. The Company files tax returns as prescribed by the tax laws of the jurisdictions in which it operates. In the normal course of business, the Company is subject to examination by federal, state, local, and foreign jurisdictions, where applicable. As of December 31, 2024, the tax years that remain subject to examination by the major tax jurisdictions under the statute of limitations is from the year 2021 forward for Federal and 2020 forward for California (with limited exceptions). During the year ended December 31, 2024, the Company recognized and paid $3,332 of interest and penalties related to state income and franchise taxes in its statement of operations.
Share-Based Payment Arrangement [Policy Text Block]	Stock-Based Compensation Ironstone recognizes the fair value of stock options granted on a straight-line basis over the requisite service period of the option grant, which is the standard vesting term of four years. The Company estimates the fair value of employee stock options and the right to purchase shares under the employee stock purchase plan using the Black-Scholes option-pricing model, in accordance with ASC Topic 718, “Stock-based Compensation”. The full impact of stock-based compensation in the future is dependent upon, among other things, the total number of stock options granted, the fair value of the stock options at the time of grant and the tax benefit that Ironstone may or may not receive from stock-based expenses. Additionally, stock-based compensation requires the use of an option-pricing model to determine the fair value of stock option awards. This determination of fair value is affected by Ironstone’s stock price as well as assumptions regarding a number of highly complex and subjective variables. These variables include, but are not limited to, Ironstone’s expected stock price volatility over the term of the awards.
Earnings Per Share, Policy [Policy Text Block]	Basic and Diluted Loss per Share Basic loss per share (“EPS”) excludes dilution and is computed by dividing net income (loss) applicable to common shareholders by the weighted average number of common shares actually outstanding during the period. Diluted EPS reflects the dilution from potentially dilutive securities, except where inclusion of such potentially dilutive securities would have an anti-dilutive effect, using the average stock price during the period in the computation and because of the net loss for the periods presented.
New Accounting Pronouncements, Policy [Policy Text Block]	Recent Accounting Pronouncements In August 2014, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) 2014-15, “Disclosure of Uncertainties about an Entity’s Ability to Continue as a Going Concern” (“ASU 2014-15”). ASU 2014-15 introduces an explicit requirement for management to assess and provide certain disclosures if there is substantial doubt about an entity’s ability to continue as a going concern. ASU 2014-15 is effective for the annual period ending after December 15, 2016. The Company has adopted ASU 2014-15. In August 2018, the FASB issued Accounting Standards Update (“ASU”) 2018-13, “Fair Value Measurement (Topic 820): Disclosure Framework – Changes to the Disclosure Requirements for Fair Value Measurement”. ASU 2018-13 removes certain disclosures, modifies others and introduces additional disclosure requirements for entities. The amendments in ASU 2018-13 for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2019. Amendments on changes in unrealized gains and losses, the range and weighted average of significant unobservable inputs used to develop Level 3 fair value measurements, and the narrative description of measurement uncertainty should be applied prospectively for only the most recent interim or annual period presented in the initial fiscal year of adoption. All other amendments should be applied retrospectively to all periods presented upon their effective date. The Company adopted the new standard on January 1, 2020. The adoption did not have a material impact on the Company’s financial statements.
Liquidity [Policy Text Block]	Liquidity As reflected in the accompanying financial statements the Company has net losses and has a negative cash flow from operations. If necessary, the Company may seek to sell additional debt or equity securities or enter into new credit facilities to meet its cash needs. The Company cannot make assurances that it will be able to complete any financing or liquidity transaction, that such financing or liquidity transaction will be adequate for the Company’s needs, or that a financing or liquidity transaction will be completed in a timely manner. These factors raise substantial doubt about the Company’s ability to continue as a going concern. The accompanying financial statements do not include any adjustments relating to the recovery and classification of asset carrying amounts or the amount and classification of liabilities that might result should the Company be unable to continue as a going concern.

Disclosure of accounting policy for income taxes, which may include its accounting policies for recognizing and measuring deferred tax assets and liabilities and related valuation allowances, recognizing investment tax credits, operating loss carryforwards, tax credit carryforwards, and other carryforwards, methodologies for determining its effective income tax rate and the characterization of interest and penalties in the financial statements.

- Definition

Disclosure of accounting policy for investment in financial asset.

+ References + Details

- Definition

Disclosure of accounting policy for award under share-based payment arrangement. Includes, but is not limited to, methodology and assumption used in measuring cost.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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-Paragraph 2
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Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 718
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-Section 50
-Paragraph 2
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Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 718
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Reference 4: http://www.xbrl.org/2003/role/disclosureRef
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-Topic 718
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Reference 6: http://www.xbrl.org/2003/role/disclosureRef
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Reference 7: http://www.xbrl.org/2003/role/disclosureRef
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-Topic 718
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Reference 9: http://www.xbrl.org/2003/role/disclosureRef
-Topic 718
-Name Accounting Standards Codification
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-URI https://asc.fasb.org/718/tableOfContent

Reference 10: http://www.xbrl.org/2003/role/disclosureRef
-Topic 718
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-Paragraph 2
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Reference 11: http://www.xbrl.org/2003/role/disclosureRef
-Topic 718
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-URI https://asc.fasb.org/1943274/2147480429/718-10-50-2

+ Details

IRONSTONE PROPERTIES, INC. 10-K