Basis of Presentation and Summary of Significant Accounting Policies (Policies) |
6 Months Ended |
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Jun. 30, 2026 | |
| Accounting Policies [Abstract] | |
| Principles of consolidation | Principles of consolidation The unaudited condensed consolidated financial statements include the accounts of the Company and its subsidiaries in which the Company has a controlling financial interest. The Company established Serina Therapeutics Australia Pty Ltd on July 2, 2025, for the purpose of conducting clinical research activities in Australia. For consolidated entities where the Company has less than 100% of ownership, the Company records net loss attributable to noncontrolling interest on the consolidated statement of operations equal to the percentage of the ownership interest retained in such entities by the respective noncontrolling parties. The noncontrolling interest is reflected as a separate element of stockholders’ equity (deficit) on the Company’s consolidated balance sheets. Any material intercompany transactions and balances have been eliminated upon consolidation. The Company assesses whether it is the primary beneficiary of a variable interest entity (“VIE”) at the inception of the arrangement and at each reporting date. This assessment is based on its power to direct the activities of the VIE that most significantly impact the VIE’s economic performance and the Company’s obligation to absorb losses or the right to receive benefits from the VIE that could potentially be significant to the VIE. If the entity is within the scope of the variable interest model and meets the definition of a VIE, the Company considers whether it must consolidate the VIE or provide additional disclosures regarding its involvement with the VIE. If the Company determines that it is the primary beneficiary of the VIE, the Company will consolidate the VIE. This analysis is performed at the initial investment in the entity or upon any reconsideration event. For entities the Company holds as an equity investment that are not consolidated under the VIE model, the Company will consider whether its investment constitutes a controlling financial interest in the entity and therefore should be considered for consolidation under the voting interest model. NeuroAirmid Therapeutics, Inc. ("NeuroAirmid") was jointly owned by the Company and certain researchers from the University of California and was organized to pursue certain cell therapies, focusing initially on Huntington’s Disease. Until November 2025, the Company owned 47.5% of the outstanding capital stock of NeuroAirmid. The Company consolidated NeuroAirmid despite not having majority ownership interest as it had the ability to influence decision making and financial results through contractual rights and obligations as per Accounting Standards Codification (“ASC”) 810, Consolidation. On October 28, 2025, a special committee of the Board of Directors approved the Company entering into a stock redemption agreement whereby NeuroAirmid redeemed the shares of NeuroAirmid capital stock held by the Company in exchange for the right to receive 5% of the net revenues recognized by NeuroAirmid in connection with the sale, lease, license, transfer, distribution or use of any products, assets or services of NeuroAirmid developed or commercialized for the purpose of treating Huntington's Disease (the "NeuroAirmid Transaction"). The NeuroAirmid Transaction was completed on November 25, 2025 and NeuroAirmid was subsequently deconsolidated with an immaterial impact on the Company's financial statements.
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| Use of estimates | Use of estimates The preparation of consolidated financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect (i) the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the consolidated financial statements, and (ii) the reported amounts of revenues and expenses during the reporting period, in each case with consideration given to materiality. Significant estimates and assumptions which are subject to significant judgment include those related to assumptions used to value stock-based awards, liability classified warrants and tranche liability. Actual results could differ materially from those estimates. To the extent there are material differences between the estimates and actual results, the Company’s future results of operations will be affected.
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| Foreign currency translation and transactions | Foreign currency translation and transactions The Company’s reporting currency is the U.S. dollar. The functional currency of the Company’s subsidiary located in Australia is the Australian Dollar. Balance sheets prepared in the functional currencies are translated to the reporting currency at exchange rates in effect at the end of the accounting period, except for stockholders’ equity (deficit) accounts, which are translated at rates in effect when these balances were originally recorded. Revenue and expense accounts are translated using an average exchange rate during the year. The resulting foreign currency translation adjustments are recorded as a separate component of accumulated other comprehensive loss in the accompanying unaudited condensed consolidated balance sheets. Gains and losses resulting from exchange rate changes on transactions denominated in a currency other than the functional currency are included in earnings as incurred.
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| Tranche liability | Tranche liability Commitments to issue common stock and warrants in connection with future equity financings are accounted for as outstanding contingently issuable instruments. The contingently issuable instruments are evaluated to determine if they are freestanding and their classification as equity or liability instruments. The Company determined that the contingently issuable instruments are liability classified due to settlement provisions that preclude equity classification. The Company recognizes a tranche liability for these contingently issuable instruments (the “Tranche Liability”) at fair value upon issuance. This Tranche Liability will be remeasured to fair value each reporting period until settled or expired, with a charge or credit to the condensed consolidated statement of operations and comprehensive loss. Refer to Note 6, Stockholders' Equity (Deficit), for details.
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| Concentration of credit risk and other risks and uncertainties | Concentration of credit risk and other risks and uncertainties Financial instruments that potentially subject the Company to concentrations of risk consist principally of cash equivalents. The Company maintains its cash deposits in Federal Deposit Insurance Corporation (“FDIC”) insured financial institutions and may at times hold investments at Securities Investor Protection Corporation (“SIPC”) insured broker-dealers. The Company is exposed to credit risk in the event of a default by the financial institutions holding our cash, cash equivalents and investments to the extent recorded on the balance sheet. Product candidates developed by the Company and its subsidiaries will require approvals or clearances from the United States Food and Drug Administration (“FDA”) or foreign regulatory agencies prior to commercial sales. There can be no assurance that any of the product candidates being developed or planned to be developed by the Company or its subsidiaries will receive any of the required approvals or clearances. If regulatory approval or clearance were to be denied or any such approval or clearance were to be delayed, it would have a material adverse impact on the Company.
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| Segment reporting | Segment reporting Operating segments are identified as components of an enterprise about which separate discrete financial information is available for evaluation by the chief operating decision maker, the Chief Executive Officer, in making decisions regarding resource allocation and assessing performance. The Company views its operations and manages its business as one operating segment.
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| Collaboration Agreements | Collaboration Agreements The Company evaluates its contractual arrangements to assess whether such arrangements involve joint operating activities within the scope of ASC 808, Collaborative Arrangements ("Topic 808"). A collaborative arrangement exists if both contractual parties are active participants in the activity and are exposed to significant risks and rewards dependent on the commercial success of the activity. For elements of collaborative arrangements accounted for pursuant to Topic 808, an appropriate recognition method is determined in a manner consistent with ASC 606, Revenue from Contracts with Customers, or by applying a reasonable accounting policy election, whereby the income statement classification is based on the nature of the arrangement or its business operations and the contractual terms of the arrangement. Payments or reimbursements resulting from the collaborative arrangement, rather than a customer relationship, such as co-development activities, are recorded as increases or decreases to research and development expense or general and administrative expense, as appropriate.
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| Recently issued accounting pronouncements not yet adopted | Recently issued accounting pronouncements not yet adopted In November 2024, the FASB issued ASU 2024-03, Income Statement-Reporting Comprehensive Income-Expense Disaggregation Disclosures (Subtopic 220-40): Disaggregation of Income Statement Expenses, to improve disclosures by providing more detailed information about the types of expenses in commonly presented expense captions. The guidance is effective for annual reporting periods beginning after December 15, 2026, and interim periods within fiscal years beginning after December 15, 2027, with early adoption permitted. The Company is currently evaluating the effect this standard will have on its consolidated financial statements and related disclosures. In September 2025, the FASB issued ASU 2025-07, Derivatives and Hedging (Topic 815) and Revenue from Contracts with Customers (Topic 606): Derivatives Scope Refinements and Scope Clarification for Share-Based Noncash Consideration from a Customer in a Revenue Contract. The ASU adds a scope exception for certain non-exchange traded contracts whose underlyings are based on operations or activities specific to one party and not based on market rates or prices, indexes, or the price or performance of a financial asset or liability of either party. It also clarifies that share-based noncash consideration from a customer in a revenue contract is within the scope of Topic 606 until the entity’s right to receive or retain such consideration becomes unconditional under that Topic. The guidance is effective for annual reporting periods beginning after December 15, 2026, and interim reporting periods within those fiscal years, with early adoption permitted on either a prospective or modified retrospective basis. The Company is currently evaluating the effect this standard will have on its consolidated financial statements and related disclosures. In April 2026, the FASB issued ASU 2026-01-Equity (Topic 505), Initial Measurement of Paid-in-Kind Dividends on Equity-Classified Preferred Stock. The amendments in this ASU clarify how issuers initially measure paid-in-kind ("PIK") dividends on equity-classified preferred stock by requiring issuers to use the PIK dividend rate stated in the preferred stock agreement. The guidance is effective for annual reporting periods beginning after December 15, 2026, and interim reporting periods within those fiscal years, with early adoption permitted on either a prospective or modified retrospective basis. The Company is currently evaluating the effect this standard will have on its consolidated financial statements and related disclosures.
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