0001628280-26-043271 | 10-K | XBRL Viewer | Vistagen Therapeutics INC

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Note Payable (Details) - Promissory Note - USD ($) $ in Millions	1 Months Ended
	May 30, 2025	May 31, 2025
Short-Term Debt [Line Items]
Interest rate		6.54%
Principal amount		$ 1.0
Monthly installments	$ 0.1

Basis of Presentation, Principles of Consolidation and Summary of Significant Accounting Policies

12 Months Ended

Mar. 31, 2026

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Basis of Presentation, Principles of Consolidation and Summary of Significant Accounting Policies

The accompanying financial statements have been prepared in accordance with accounting principles generally accepted in the United States (GAAP), and reflect the operations of Vistagen and our wholly owned subsidiaries. Any reference in these notes to applicable guidance is meant to refer to GAAP as found in the Accounting Standards Codification (ASC) and Accounting Standards Updates (ASU) promulgated by the Financial Accounting Standards Board (FASB). All material intercompany accounts and transactions have been eliminated in consolidation.

Liquidity and Going Concern

In order to complete the development of our neuroscience product candidates and to build the sales, marketing and distribution infrastructure that we believe will be necessary to commercialize our product candidates, if approved, we will require substantial additional capital. Until we can generate a sufficient amount of revenue from the commercialization of our product candidates, we may seek to raise any necessary additional capital through equity and/or debt financings, loans or other capital sources, which could include income from collaborations, partnerships or other marketing, distribution, licensing or other strategic arrangements with third parties. Because of the numerous risks and uncertainties associated with research, development and commercialization of our product candidates, we are unable to estimate the exact amount and timing of our capital requirements. We do not expect to generate any meaningful revenue unless and until we obtain regulatory approval of and commercialize any of our product candidates, and we do not know when, or if, that will occur.

We have incurred significant losses and negative cash flows from operations since inception. As of March 31, 2026, we had an accumulated deficit of $477.3 million and cash used in operations for the year ended March 31, 2026 was $66.4 million. We expect that our operating losses and negative cash flows will continue for the foreseeable future as we continue to develop our product candidates.

In accordance with Accounting Standards Codification (ASC) 205-40, Going Concern, we evaluated whether there are conditions and events, considered in the aggregate, that raise substantial doubt about our ability to continue as a going concern within one year from the date that these consolidated financial statements are issued. This evaluation initially does not take into consideration the potential mitigating effect of management’s plans that have not been fully implemented as of the date the consolidated financial statements are issued. When substantial doubt exists under this methodology, management evaluates whether the mitigating effect of its plans sufficiently alleviates substantial doubt about our ability to continue as a going concern. The mitigating effect of management’s plans, however, is only considered if both (1) it is probable that the plans will be effectively implemented within one year after the date that the consolidated financial statements are issued, and (2) it is probable that the plans, when implemented, will mitigate the relevant conditions or events that raise substantial doubt about the entity’s ability to continue as a going concern within one year after the date that the consolidated financial statements are issued. In performing its analysis, management excluded certain elements of its operating plan that cannot be considered probable. Under ASC 205-40, the future receipt of potential funding from future equity and/or debt issuances and other potential sources such as partnerships cannot be considered probable at this time because these plans are not entirely within our control nor have these plans been approved by the Board as of the date of these consolidated financial statements.

As of March 31, 2026 and 2025, we had cash, cash equivalents, and marketable securities of $45.4 million and $80.5 million, respectively. As of June 15, 2026, the issuance date of the consolidated financial statements as of and for the year

ended March 31, 2026, there is uncertainty about whether our combined cash, cash equivalents, and marketable securities will be sufficient to fund operations beyond twelve months from the issuance date of these consolidated financial statements and therefore we concluded that substantial doubt exists about our ability to continue as a going concern.

The accompanying consolidated financial statements have been prepared on a going concern basis, which contemplates the realization of assets and satisfaction of liabilities in the ordinary course of business. The consolidated financial statements do not include any adjustments relating to the recoverability and classification of recorded asset amounts or the amounts and classification of liabilities that might result from the outcome of the uncertainties described above.

Summary of Significant Accounting Policies

Use of Estimates

The preparation of financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities, the 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. Estimates reflected in the accompanying consolidated financial statements include, but are not limited to, those relating to stock-based compensation, revenue recognition, research and development expenses, determination of right-of-use assets under lease transactions and related lease obligations, useful lives of property and equipment, deferred tax assets and liabilities and the related valuation allowance, and the assumptions used to value warrants. We base our estimates on historical experience, known trends and other market-specific or other relevant factors that we believe to be reasonable under the circumstances. Actual results could differ from those estimates.

Concentration of Credit Risk

Financial instruments which potentially subject us to significant concentration of credit risk consist of cash and cash equivalents. We maintain deposits in federally insured financial institutions in excess of federally insured limits. We have not experienced any losses in such accounts, and management believes that we are not exposed to significant credit risk due to the nature of the instruments held in the depository institutions.

Cash and Cash Equivalents

Cash and cash equivalents are considered to be highly liquid investments with maturities of three months or less at the date of purchase. Cash equivalents primarily represent funds invested in readily available money market accounts and short-term treasury notes. As of March 31, 2026, we had cash and cash equivalents balances deposited at multiple major financial institutions.

Property and Equipment

Property and equipment is stated at cost and depreciated using the straight-line method over the estimated useful lives of the assets (generally three to ten years, or the remaining term of the lease). Repairs and maintenance costs are expensed as incurred, while expenditures that extend the useful life of an asset or add new functionality are capitalized and depreciated over the remaining useful life of the related asset.

Impairment of Long-Lived Assets

We evaluate our long-lived assets, which consist of property and equipment and right-of-use assets, whenever events or changes in circumstances indicate that the carrying amount of such assets may not be recoverable. Recoverability of assets to be held and used is measured by a comparison of the carrying amount of an asset to the future undiscounted net cash flows expected to be generated by the asset. If such assets are considered to be impaired, the impairment to be recognized is measured by the amount by which the carrying amount of the asset exceeds the fair value of the asset. To date, we have not recorded any impairment losses on long-lived assets.

Deferred Offering Costs

Deferred offering costs include registration expenses related to our current registration statement on SEC Form S-3, which became effective on February 29, 2024, and expenses related to the Sales Agreement (as described in Note 8, Capital Stock). These expenses consist primarily of legal, accounting, SEC filing fees, and, as appropriate, Nasdaq filing fees.

Upon the completion or partial completion of an applicable equity offering, the deferred expenses are charged to additional paid-in capital. If there are any deferred offering costs remaining at the expiration of our current registration statement on SEC Form S-3 or the equity financing agreement, or if the financing is abandoned, terminated or significantly delayed, such costs are charged to expense.

Revenue Recognition

Under ASC Topic 606, we recognize revenue when our customer obtains control of promised goods or services, in an amount that reflects the consideration that we expect to be entitled to in exchange for those goods or services. To determine revenue recognition for arrangements that we determine are within the scope of Topic 606, we perform the following five steps: (i) identify the contract with a customer; (ii) identify the performance obligations in the contract; (iii) determine the transaction price, including variable consideration, if any; (iv) allocate the transaction price to the performance obligations in the contract; and (v) recognize revenue when (or as) we satisfy a performance obligation. We only apply the five-step model to contracts when it is probable that we will collect the consideration to which we are entitled in exchange for the goods or services we transfer to a customer.

At contract inception, once the contract is determined to be within the scope of ASC 606, we assess whether the goods or services promised within each contract are distinct and, therefore, represent a separate performance obligation. Goods and services that are determined not to be distinct are combined with other promised goods and services until a distinct combined performance obligation is identified. We then allocate the transaction price (that is, the amount of consideration we expect to be entitled to from a customer in exchange for the promised goods or services) to each performance obligation and recognize the associated revenue when (or as) each performance obligation is satisfied. Our estimate of the transaction price for each contract includes all variable consideration to which we expect to be entitled, subject to the constraint on variable consideration. Variable consideration is not constrained if the potential reversal of cumulative revenue recognized at the contract level is not significant.

License Rights — If the license to our intellectual property (IP) is determined to be distinct from the other promises or performance obligations identified in the arrangement, which generally include research and development services, we recognize revenue from non-refundable, upfront fees allocated to the license when the license is transferred to the customer and the customer is able to use and benefit from the license. In assessing whether a license is distinct from the other promises, we consider relevant facts and circumstances of each arrangement, including the research and development capabilities of the collaboration partner and the availability of the associated expertise in the general marketplace. In addition, we consider whether the collaboration partner can benefit from the license for its intended purpose without the receipt of the remaining promises, whether the value of the license is dependent on the unsatisfied promises, whether there are other vendors that could provide the remaining promises and whether it is separately identifiable from the remaining promises. For licenses that are combined with other promises, we utilize judgment to assess the nature of the combined performance obligation and whether the license is the predominant promise within the combined performance obligation to determine whether the combined performance obligation is satisfied over time or at a point in time and, if over time, the appropriate method of measuring progress for purposes of recognizing revenue. If the license is the predominant promise, and it is determined that the license represents functional IP, revenue is recognized at the point in time when control of the license is transferred. If it is determined that the license does not represent functional IP, revenue is recognized over time using an appropriate method of measuring progress.

Customer Options — Our arrangements may provide a collaborator with the right to acquire additional goods or services in the future. If an arrangement is determined to contain customer options that allow the customer to acquire additional goods or services, the additional goods and services underlying the customer options are evaluated in order to determine if these additional goods or services are distinct from those included as a performance obligation at the outset of the arrangement. If the additional services are not determined to be distinct, the variable consideration pertaining to the customer option is added to the initial transaction price at the time in which the option exercise becomes probable. Any such adjustments to the transaction price are recorded on a cumulative catch-up basis, which would affect revenues and earnings in the period of adjustment. If the additional services are distinct, we evaluate the customer options for material rights, or options to acquire additional goods or services for free or at a discount. Material rights are recognized as a separate performance obligation at the inception of the arrangement. We allocate the transaction price to material rights based on the relative stand-alone selling price, which is determined based on the identified discount and the probability that the customer will exercise the option. Amounts allocated to a material right are not recognized as revenue until, at the earliest, the option is exercised or expires.

Milestone Payments — At the inception of an arrangement that includes development milestone payments, we evaluate whether the milestones are considered likely to be achieved and estimate the amount to be included in the transaction price using the most likely amount method. If it is probable that a significant reversal of cumulative revenue recognized would not occur, the associated milestone value is included in the transaction price. Milestone payments that are not within our control, such as regulatory approvals, are not considered probable to be achieved until those approvals are received. We evaluate factors such as the scientific, clinical, regulatory, commercial and other risks that must be overcome to achieve the particular milestone in making this assessment. There is considerable judgment involved in determining whether it is probable that a significant revenue reversal would not occur. At the end of each subsequent reporting period, we reevaluate the probability of achievement of all milestones subject to constraint and, if necessary, adjusts its estimate of the overall transaction price. Any such adjustments are recorded on a cumulative catch-up basis, which would affect revenues and earnings in the period of adjustment.

Royalties — For arrangements that include sales-based royalties, including milestone payments based on a level of sales, where the license is deemed to be the predominant item to which the royalties relate, we recognize revenue at the later of (i) when the related sales occur or (ii) when the performance obligation to which some or all of the royalty has been allocated has been satisfied (or partially satisfied). To date, we have not recognized any royalty revenue resulting from licensing agreements.

Amounts due to us for satisfying the revenue recognition criteria or that are contractually due based upon the terms of the collaboration agreements are recorded as accounts receivable on the consolidated balance sheets. Amounts received prior to satisfying the revenue recognition criteria are recorded as deferred revenue. Amounts expected to be recognized as revenue within the one year following the balance sheet date are classified as current deferred revenue. Amounts not expected to be recognized as revenue within the one year following the balance sheet date are classified as deferred revenue, net of current portion.

Research and Development Expenses and Accruals

Research and development expenses are composed of both internal and external costs. Internal costs include salaries and employment-related expenses, including stock-based compensation expense, of scientific personnel and direct project costs. External research and development expenses consist primarily of costs associated with clinical and nonclinical development programs and are charged to expense as incurred.

We have entered into various research and development contracts with clinical research organizations, clinical development and manufacturing organizations, clinical sites and other vendors and consultants. Payments for these activities are based on the terms of the individual agreements, which may differ from the pattern of costs incurred, and payments made in advance of or after the performance are reflected in the accompanying balance sheets as prepaid expenses or accrued liabilities, respectively. When evaluating the adequacy of the accrued liabilities, we analyze progress of the services, including the phase or completion of events, invoices received and contracted costs. We hold discussions with relevant employees and outside service providers as to assess the progress of clinical trials and services performed. Significant judgments and estimates may be made in determining the prepaid or accrued balances at the end of any reporting period. Actual results could differ from our estimates. Nonrefundable advance payments for goods and services, including fees for process development, are deferred and recognized as expenses in the period that the related goods are consumed or services are performed.

Income Taxes

We account for income taxes using the asset and liability approach promulgated by ASC 740, Income Taxes, for financial reporting purposes. Deferred tax assets and liabilities are recognized for the future tax consequences attributable to differences between the financial statement carrying amounts of existing assets and liabilities and their respective tax bases and operating loss and tax credit carryforwards. Deferred tax assets and liabilities are measured using enacted tax rates expected to apply to taxable income in the years in which those temporary differences are expected to be recovered or settled. The effect on deferred tax assets and liabilities of a change in tax rates is recognized in income in the period that includes the enactment date. Valuation allowances are established, when necessary, to reduce the deferred tax assets to an amount expected to be realized.

Uncertain tax positions, for which our assessment is that there is a more than 50% probability of sustaining the position upon challenge by a taxing authority based on its technical merits, are subject to certain recognition and measurement

criteria. The nature of the uncertain tax positions is often very complex and subject to change, and the amounts at issue can be substantial. We develop our cumulative probability assessment of the measurement of uncertain tax positions using internal experience, judgment and assistance from our professional advisors. We re-evaluate these uncertain tax positions on a quarterly basis based on a number of factors including, but not limited to, changes in facts or circumstances, changes in tax law, and effectively settled issues under audit and new audit activity. Any change in these factors could result in the recognition of a tax benefit or an additional charge to the tax provision.

Effective April 1, 2025, we adopted ASU 2023-09, Income Taxes (Topic 740): Improvements to Income Tax Disclosures, on a prospective basis. ASU 2023-09 requires enhanced disclosures related to the effective tax rate reconciliation and income taxes paid. The adoption resulted in expanded disclosures in Note 10, Income Taxes, and did not affect our consolidated financial position, results of operations, or cash flows.

Leases

At the inception of a contractual agreement, we determine whether the contract is or contains a lease, by assessing whether there is an identified asset and whether the contract conveys the right to control the use of the identified asset in exchange for consideration over a period of time. If both criteria are met, we record the associated lease liability and corresponding right-of-use asset upon commencement of the lease using the implicit rate or a discount rate based on a credit-adjusted secured borrowing rate commensurate with the term of the lease. When determining the lease term, we include options to extend or terminate the lease when it is reasonably certain, at inception, that we will exercise that option. Additionally, we evaluate leases at their inception to determine if they are to be accounted for as an operating lease or a finance lease.

Operating lease assets represent our right to use an underlying asset for the lease term (Right-of-use assets) and operating lease liabilities represent our obligation to make lease payments arising from the lease. The lease payments used to determine our operating lease assets may include lease incentives, stated rent increases and escalation clauses linked to rates of inflation, when determinable, and are recognized in determining our Right-of-use assets.

Operating lease liabilities with a term greater than one year and their corresponding right-of-use assets are recognized on the balance sheets at the commencement date of the lease based on the present value of lease payments over the expected lease term. We exclude short-term leases, if any, having initial terms of 12 months or less at lease commencement as an accounting policy election. Variable lease payments are amounts owed by us to a lessor that are not fixed, such as reimbursement for common area maintenance costs for our facility lease; and are expensed when incurred. Operating right-of-use assets are reflected in right-of-use assets in the accompanying balance sheets. Operating lease liabilities are reflected in operating lease obligations, current and non-current in the accompanying balance sheets.

Financing leases, formerly referred to as capitalized leases, are treated similarly to operating leases except that the asset subject to the lease is included in the appropriate fixed asset category, rather than recorded as a Right-of-use asset, and depreciated over its estimated useful life, or lease term, if shorter. We have not entered into any financing leases as of the balance sheet dates presented.

Internal-Use Software Development Costs

We capitalize qualifying costs incurred during the application development stage related to software developed for internal-use and amortize them over the estimated useful life of three years. Amortization of such costs begins when the project is substantially complete and ready for its intended use. Capitalized software development costs are classified as property and equipment, net on the consolidated balance sheet. We expense costs incurred related to the planning and post-implementation phases of development as incurred.

Stock-Based Compensation

Stock-based compensation is accounted for in accordance with ASC 718, Compensation - Stock Compensation (ASC 718) and is measured at the grant date fair value for employee, officer, director and non-employee equity awards and is recognized over the requisite service period, which is generally the vesting period. We recognize forfeitures as they occur. Stock-based compensation is classified in the Consolidated Statements of Operations and Comprehensive Loss in the same manner in which the recipient's payroll or fees are classified.

The fair value of stock options is estimated using a Black-Scholes valuation model on the date of grant. This method requires that certain assumptions be used as inputs, such as the fair value of the underlying common stock, expected term

of the option before exercise, expected volatility of our common stock, risk-free interest rate and expected dividend. Options granted have a maximum contractual term of ten years. We have limited historical stock option activity and therefore estimate the expected term of stock options granted using the simplified method, which represents the arithmetic average of the original contractual term of the stock option and its weighted-average vesting term. The expected volatility of stock options is estimated based on the average historical volatility of our own common stock. The risk-free interest rates used are based on the U.S. Treasury yield in effect at the time of grant for zero-coupon U.S. treasury notes with maturities approximately equal to the expected term of the stock options. We have historically not declared or paid any dividends and we do not currently expect to do so in the foreseeable future, and therefore have estimated the dividend yield to be zero.

Fair Value Measurements

We measure certain assets and liabilities at fair value on a recurring basis. Fair value is defined as the exchange price that would be received for an asset or paid to transfer a liability (an exit price) in the principal or most advantageous market for the asset or liability in an orderly transaction between market participants at the measurement date. We use a three-tier fair value hierarchy to prioritize the inputs used in measuring fair value, which are as follows:

•Level 1 — Unadjusted quoted prices in active markets that are accessible at the measurement date for identical assets or liabilities.

•Level 2 — Quoted prices for similar assets and liabilities in active markets, quoted prices in markets that are not active, or inputs which are observable, either directly or indirectly, for substantially the full term of the asset or liability.

•Level 3 — Prices or valuation techniques that require inputs that are both significant to the fair value measurement and unobservable (i.e. supported by little or no market activity).

Money market funds are highly liquid investments and are classified as Level 1. The pricing information for these assets is readily available and can be independently validated as of the measurement date. Available-for sale debt securities are valued using observable inputs from similar assets, or from observable data in markets that are not active. These assets are classified as Level 2.

Warrants Issued in Connection with Equity Financing

We evaluate the appropriate balance sheet classification of warrants we issue as either equity or as a derivative liability. In accordance with ASC 815-40, Derivatives and Hedging-Contracts in the Entity’s Own Equity (ASC 815-40), we classify a warrant as equity if it is “indexed to the Company’s equity” and meets several specific conditions for equity classification. A warrant is not considered “indexed to the Company’s equity,” in general, when it contains certain types of exercise contingencies or potential adjustments to its exercise price. If a warrant is not indexed to the Company’s equity or it has net cash settlement provisions that result in the warrants being accounted for under ASC 480, Distinguishing Liabilities from Equity or ASC 815-40, it is classified as a derivative liability which is carried on the consolidated balance sheets at fair value with any changes in its fair value recognized immediately in the Statements of Operations and Comprehensive Loss. At March 31, 2026 and 2025 all of our outstanding warrants were classified as equity.

Comprehensive Loss

Comprehensive loss includes net loss as well as other changes in shareholders’ equity that result from transactions and economic events other than those with shareholders. For the year ended March 31, 2026, these changes related to unrealized gains and losses on our available-for-sale short-term investments. There were no reclassifications out of comprehensive loss for the years ended March 31, 2026 and 2025, respectively.

Net Loss Per Share

We calculate basic and diluted net loss per share attributable to common stockholders in conformity with the two-class method required for participating securities. Certain warrants participate in distributions of the Company. The Pre-Funded Warrants associated with the October 2023 Public Offering (see Note 8 below) are considered outstanding shares in the basic earnings per share calculation given their nominal exercise price. The net loss attributable to common stockholders is

not allocated to the warrant holders as the holders of warrants do not have a contractual obligation to share in losses. Basic net loss per share is calculated by dividing the net loss by the weighted-average number of common shares outstanding for the period. Diluted net loss per share is computed by dividing the net loss by the weighted-average number of shares of common stock and common stock equivalents outstanding for the period. Common stock equivalents are only included when their effect is dilutive. Our potentially dilutive securities, including outstanding warrants to purchase common stock and outstanding stock options under our equity incentive plan, have been excluded from the computation of diluted net loss per share as their inclusion would be anti-dilutive. For all periods presented, there is no difference in the number of shares used to calculate basic and diluted shares outstanding due to our net loss position.

The following table summarizes the outstanding potentially dilutive securities that have been excluded from the calculation of diluted net loss per share because their inclusion in the calculation would be anti-dilutive:


	As of March 31,
	2026	2025
Outstanding options under the Company's Amended and Restated 2016 (formerly 2008) Stock Incentive Plan and 2019 Omnibus Equity Incentive Plan	4,457,368	3,239,642
Outstanding warrants to purchase common stock	20,559,108	20,571,460
Total	25,016,476	23,811,102

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 in making decisions regarding resource allocation and assessing performance. We manage our operations as a single reportable segment for the purposes of assessing performance and making operating decisions.

Related Parties

Transactions between related parties are considered to be related party transactions even though they may not be given accounting recognition. ASC 850, Related Party Disclosures (ASC 850) requires that transactions with related parties that would make a difference in decision-making shall be disclosed so that users of the financial statements can evaluate their significance.

Recently Adopted Accounting Principles

In December 2023, the FASB issued ASU No. 2023-09, Income Taxes (Topic 740): Improvements to Income Tax Disclosures. ASU 2023-09 requires disaggregated information about a reporting entity’s effective tax rate reconciliation as well as information on income taxes paid. ASU 2023-09 is effective for public entities with annual periods beginning after December 15, 2024, with early adoption permitted. The Company adopted ASU 2023-09 on a prospective basis effective April 1, 2025, resulting in enhanced income tax disclosures. See Note 10, Income Taxes, for the enhanced disclosures required under ASU 2023-09.

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), which requires disaggregated disclosure of certain expense categories on the face of the income statement or in the notes. ASU 2024-03 is effective for annual reporting periods beginning after December 15, 2026, and for interim reporting periods within annual reporting periods beginning after December 15, 2027. For us, this means the standard will first apply to our annual financial statements for the year ending March 31, 2028, and to our interim financial statements beginning with the quarter ending June 30, 2028. Early adoption is permitted. We are currently evaluating the impact of adoption.

In September 2025, the FASB issued ASU 2025-06, Intangibles — Goodwill and Other Internal-Use Software (Subtopic 350-40): Targeted Improvements to the Accounting for Internal-Use Software. This guidance modernizes the accounting

framework for internal-use software by providing clearer criteria for capitalization, including the requirement to assess whether significant development uncertainty exists. ASU 2025-06 is effective for annual reporting periods beginning after December 15, 2027, and interim reporting periods within those annual reporting periods. For us, this means the standard will first apply to our annual and interim financial statements beginning with the fiscal year ending March 31, 2029. Early adoption is permitted. We are currently evaluating the impact of this guidance on our consolidated financial statements.

In December 2025, the FASB issued ASU 2025-11, Interim Reporting (Topic 270): Narrow-Scope Improvements, which provides clarity on the required interim disclosures under Topic 270 by providing a comprehensive list of required interim disclosures, and clarifies the applicability of Topic 270. ASU 2025-11 is effective for interim reporting periods within fiscal years beginning after December 15, 2027. For us, this means the standard will first apply to our interim financial statements beginning with the quarter ending June 30, 2028. ASU 2025-11 may be adopted on a prospective or retrospective basis, and early adoption is permitted. We are currently evaluating the impact of this guidance on our consolidated financial statements.

In December 2025, the FASB issued ASU 2025-12, Codification Improvements, which includes 33 amendments to the Accounting Standards Codification intended to clarify existing guidance, correct technical errors, and address minor inconsistencies across a broad range of topics. ASU 2025-12 is effective for the Company for annual reporting periods beginning after December 15, 2026. For us, this means the standard will first apply to our annual financial statements for the year ending March 31, 2028. Early adoption is permitted. We have evaluated the amendments in ASU 2025-12 and do not expect adoption to have a material impact on our consolidated financial statements or disclosures.

We have considered all other recently issued accounting pronouncements and do not believe any are relevant to, or will have a material impact on, our consolidated financial position, results of operations, or cash flows other than those discussed above.

Description of Business	12 Months Ended
Description of Business	Mar. 31, 2026
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Description of Business	Description of Business Overview Vistagen Therapeutics, Inc., a Nevada corporation (Vistagen, the Company, we, our, or us), is a late clinical-stage biopharmaceutical company leveraging a deep understanding of nose-to-brain neurocircuitry to develop and potentially commercialize a new class of non-systemic intranasal product candidates called pherines. Our clinical-stage neuroscience pipeline currently includes five clinical-stage intranasal pherine product candidates, each with a novel proposed mechanism of action (MOA) and at least one positive clinical study involving our targeted patient population. Pherines rapidly, specifically and selectively bind to peripheral receptors in human nasal chemosensory neurons, and are designed to rapidly activate nose-to-brain neurocircuits believed to regulate brain areas without requiring systemic absorption or uptake into the brain to achieve desired therapeutic benefits.

Related Party Transactions (Details) - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2026	Mar. 31, 2025
Related Party \| Dotson Consulting Agreement
Related Party Transaction [Line Items]
Related party expenses	$ 120	$ 120

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

+ Details

Capital Stock - October 2023 Public Offering (Details) $ / shares in Units, $ in Thousands			12 Months Ended
	Oct. 04, 2023 USD ($)	Oct. 02, 2023 USD ($) $ / shares shares	Mar. 31, 2026 USD ($)
Capital Unit [Line Items]
Gross proceeds \| $			$ 30,586
Warrants exercisable, percentage of common shares outstanding minimum benchmark		0.0999
Warrants exercisable, percentage of common shares outstanding maximum benchmark		0.1999
Notice period to increase or decrease warrant percentage		61 days
Prefunded Warrants
Capital Unit [Line Items]
Number of common shares underlying warrants (in shares)		3,577,240
Warrants (in shares)		3,577,240
T1 Warrants
Capital Unit [Line Items]
Warrants (in shares)		9,294,022
Exercise price per share (in dollars per share) \| $ / shares		$ 5.38
T2 Warrants
Capital Unit [Line Items]
Warrants (in shares)		11,265,086
Exercise price per share (in dollars per share) \| $ / shares		$ 8.877
Public Offering
Capital Unit [Line Items]
Gross proceeds \| $		$ 100,000
Shares issued (in shares)		15,010,810
Proceeds net of expenses \| $	$ 93,500

Note Payable	12 Months Ended
Note Payable	Mar. 31, 2026
Debt Disclosure [Abstract]
Notes Payable	Note Payable In May 2025, we executed a 6.54% promissory note in the principal amount of $1.0 million in connection with certain insurance policy premiums. The note is payable in monthly installments of approximately $0.1 million, including principal and interest, through April 2026. As of March 31, 2026, the outstanding balance related to the premium financing was approximately $0.1 million. Interest accrued related to the premium financing arrangement was immaterial as of March 31, 2026.

- Definition

The entire disclosure for information about short-term and long-term debt arrangements, which includes amounts of borrowings under each line of credit, note payable, commercial paper issue, bonds indenture, debenture issue, own-share lending arrangements and any other contractual agreement to repay funds, and about the underlying arrangements, rationale for a classification as long-term, including repayment terms, interest rates, collateral provided, restrictions on use of assets and activities, whether or not in compliance with debt covenants, and other matters important to users of the financial statements, such as the effects of refinancing and noncompliance with debt covenants.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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Reference 33: http://www.xbrl.org/2003/role/disclosureRef
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Reference 34: http://www.xbrl.org/2003/role/disclosureRef
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Reference 35: http://www.xbrl.org/2003/role/disclosureRef
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+ Details

Cybersecurity Risk Management and Strategy Disclosure	12 Months Ended
Cybersecurity Risk Management and Strategy Disclosure	Mar. 31, 2026
Cybersecurity Risk Management, Strategy, and Governance [Line Items]
Cybersecurity Risk Management Processes for Assessing, Identifying, and Managing Threats [Text Block]	We have developed and implemented a cybersecurity risk management program intended to protect the confidentiality, integrity, and availability of our critical systems and information. We implement reasonable administrative, technical and procedural safeguards to manage cybersecurity risks, including multi-layered technical security measures, mandatory user security awareness and training, access control policies and activity monitoring. Additionally, we engage third-party cybersecurity experts to assess the security of our network. We design and assess our program based on the NIST Special Publication 800-171 and the Cybersecurity Maturity Model Certification (CMMC) Level 1. This does not imply that we meet any particular technical standards, specifications, or requirements, only that we use the NIST CSF and CMMC maturity models as a guide to help us identify, assess, and manage cybersecurity risks relevant to our business. Our cybersecurity risk management program is designed to be integrated into our overall enterprise risk management program, and shares common methodologies, reporting channels and governance processes that apply across the enterprise risk management program to other legal, compliance, strategic, operational, and financial risk areas. Our cybersecurity risk management program includes: • risk assessments designed to help identify material cybersecurity risks to our critical systems, information, products, services, and our broader enterprise information technology environment; • a security team principally responsible for managing (i) our cybersecurity risk assessment processes, (ii) our security controls, and (iii) our response to cybersecurity incidents; • the use of external service providers, where appropriate, to assess, test or otherwise assist with aspects of our security controls; • cybersecurity awareness training of our employees, incident response personnel, and senior management; • a cybersecurity incident response plan that includes procedures for responding to cybersecurity incidents; and • a third-party risk management process for service providers, suppliers, and vendors that have access to our critical systems and information. There can be no assurance that our cybersecurity risk management program and processes, including our policies, controls or procedures, will be fully implemented, complied with or effective in protecting our systems and information. We have not identified risks from known cybersecurity threats, including as a result of any prior cybersecurity incidents, that have materially affected or are reasonably likely to materially affect us, including our operations, business strategy, results of operations, or financial condition.
Cybersecurity Risk Management Processes Integrated [Flag]	true
Cybersecurity Risk Management Processes Integrated [Text Block]	We have developed and implemented a cybersecurity risk management program intended to protect the confidentiality, integrity, and availability of our critical systems and information. We implement reasonable administrative, technical and procedural safeguards to manage cybersecurity risks, including multi-layered technical security measures, mandatory user security awareness and training, access control policies and activity monitoring. Additionally, we engage third-party cybersecurity experts to assess the security of our network. We design and assess our program based on the NIST Special Publication 800-171 and the Cybersecurity Maturity Model Certification (CMMC) Level 1. This does not imply that we meet any particular technical standards, specifications, or requirements, only that we use the NIST CSF and CMMC maturity models as a guide to help us identify, assess, and manage cybersecurity risks relevant to our business. Our cybersecurity risk management program is designed to be integrated into our overall enterprise risk management program, and shares common methodologies, reporting channels and governance processes that apply across the enterprise risk management program to other legal, compliance, strategic, operational, and financial risk areas.
Cybersecurity Risk Management Third Party Engaged [Flag]	true
Cybersecurity Risk Third Party Oversight and Identification Processes [Flag]	true
Cybersecurity Risk Materially Affected or Reasonably Likely to Materially Affect Registrant [Flag]	false
Cybersecurity Risk Board of Directors Oversight [Text Block]	Cybersecurity Governance Our Board of Directors (the Board) considers cybersecurity risk as part of its risk oversight function and the Audit Committee (the Committee) contributes to oversight of cybersecurity risks. The Board receives periodic reports from management on our cybersecurity risks. In addition, management updates the Committee, as necessary or appropriate, regarding any material cybersecurity incidents, as well as any incidents with lesser impact potential, as appropriate. The Board may also receive briefings from management on our cyber risk management program, and may receive presentations on cybersecurity topics from our Chief Financial Officer (CFO) or external experts as part of the Board's continuing education on topics that impact public companies. Members of our management team, including our CFO, Head of Information Technology, General Counsel and our Vice President of Quality Assurance, are responsible for assessing and managing our material risks from cybersecurity threats. This cybersecurity management team has primary responsibility for our overall cybersecurity risk management program and oversees our retained external cybersecurity experts, which includes individuals with significant experience running or overseeing cybersecurity programs at similarly sized biotechnology organizations and navigating the associated risk landscape. Our cybersecurity management team supervises efforts to prevent, detect, mitigate, and remediate cybersecurity risks and incidents through various means, which may include briefings from cybersecurity experts; threat intelligence and other information obtained from governmental, public or private sources, including external consultants engaged by us; and alerts and reports produced by security tools deployed in the information technology environment.
Cybersecurity Risk Board Committee or Subcommittee Responsible for Oversight [Text Block]	Our Board of Directors (the Board) considers cybersecurity risk as part of its risk oversight function and the Audit Committee (the Committee) contributes to oversight of cybersecurity risks.
Cybersecurity Risk Process for Informing Board Committee or Subcommittee Responsible for Oversight [Text Block]	The Board receives periodic reports from management on our cybersecurity risks. In addition, management updates the Committee, as necessary or appropriate, regarding any material cybersecurity incidents, as well as any incidents with lesser impact potential, as appropriate.
Cybersecurity Risk Role of Management [Text Block]	The Board may also receive briefings from management on our cyber risk management program, and may receive presentations on cybersecurity topics from our Chief Financial Officer (CFO) or external experts as part of the Board's continuing education on topics that impact public companies. Members of our management team, including our CFO, Head of Information Technology, General Counsel and our Vice President of Quality Assurance, are responsible for assessing and managing our material risks from cybersecurity threats. This cybersecurity management team has primary responsibility for our overall cybersecurity risk management program and oversees our retained external cybersecurity experts, which includes individuals with significant experience running or overseeing cybersecurity programs at similarly sized biotechnology organizations and navigating the associated risk landscape. Our cybersecurity management team supervises efforts to prevent, detect, mitigate, and remediate cybersecurity risks and incidents through various means, which may include briefings from cybersecurity experts; threat intelligence and other information obtained from governmental, public or private sources, including external consultants engaged by us; and alerts and reports produced by security tools deployed in the information technology environment.
Cybersecurity Risk Management Positions or Committees Responsible [Flag]	true
Cybersecurity Risk Management Positions or Committees Responsible [Text Block]	Members of our management team, including our CFO, Head of Information Technology, General Counsel and our Vice President of Quality Assurance, are responsible for assessing and managing our material risks from cybersecurity threats. This cybersecurity management team has primary responsibility for our overall cybersecurity risk management program and oversees our retained external cybersecurity experts, which includes individuals with significant experience running or overseeing cybersecurity programs at similarly sized biotechnology organizations and navigating the associated risk landscape.
Cybersecurity Risk Management Expertise of Management Responsible [Text Block]	This cybersecurity management team has primary responsibility for our overall cybersecurity risk management program and oversees our retained external cybersecurity experts, which includes individuals with significant experience running or overseeing cybersecurity programs at similarly sized biotechnology organizations and navigating the associated risk landscape.
Cybersecurity Risk Process for Informing Management or Committees Responsible [Text Block]	Our cybersecurity management team supervises efforts to prevent, detect, mitigate, and remediate cybersecurity risks and incidents through various means, which may include briefings from cybersecurity experts; threat intelligence and other information obtained from governmental, public or private sources, including external consultants engaged by us; and alerts and reports produced by security tools deployed in the information technology environment.
Cybersecurity Risk Management Positions or Committees Responsible Report to Board [Flag]	true

Leases (Tables)

12 Months Ended

Mar. 31, 2026

Leases [Abstract]

Schedule of Lease Cost

The following table summarizes the effect of operating lease costs in our consolidated statements of operations (in thousands):


	Year Ended March 31,
	2026		2025
Operating lease costs	$	645	$	645
Variable lease costs	421		309
Total lease cost	$	1,066	$	954

Schedule of Future Lease Payments for Non-Cancellable Operating Leases

Maturities of lease liabilities as of March 31, 2026 were as follows (in thousands):


Year ending March 31,	Amount
2027	$	754
2028	254
Thereafter	—
Total minimum lease payments	1,008
Less: amount representing interest	(60)
Present value of operating lease liabilities	948
Less: operating lease liabilities - current portion	(699)
Operating lease liabilities - non-current portion	$	249

Leases - Narrative (Details) $ in Millions	12 Months Ended
Leases - Narrative (Details) $ in Millions	Mar. 31, 2026 USD ($)	Mar. 31, 2025 USD ($)	Mar. 31, 2016 renewal_option	Oct. 14, 2021
Leases [Abstract]
Number of lease renewal options \| renewal_option			1
Lease renewal term			5 years
Lease extension term				5 years
Remaining lease term	1 year 3 months 18 days	2 years 3 months 18 days
Weighted average discount rate	8.54%	8.54%
Cash payments \| $	$ 0.7	$ 0.8

Sublicense and Collaborative Agreements (Tables)

12 Months Ended

Mar. 31, 2026

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Schedule of Changes in Contract Assets and Contract Liabilities

The following table presents changes in contract assets and liabilities during the year ended March 31, 2026 (in thousands). Contract acquisition costs are included as a component of other assets on our consolidated balance sheets.


	Balance at March 31, 2025		Additions		Deductions		Balance at March 31, 2026
Contract assets:
Deferred contract acquisition costs	$	130	$	—	$	(74)	$	56
Contract liabilities:
Deferred revenue	$	2,979	$	—	$	(1,269)	$	1,710

Fair Value Measurements - Marketable Securities (Details) - USD ($) $ in Thousands	Mar. 31, 2026	Mar. 31, 2025
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Amortized Cost	$ 14,616	$ 13,346
Unrealized Gains	2	5
Unrealized Losses	(4)	0
Fair Value	14,614	13,351
U.S. treasury notes
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Amortized Cost	14,616	13,346
Unrealized Gains	2	5
Unrealized Losses	(4)	0
Fair Value	$ 14,614	$ 13,351

Basis of Presentation, Principles of Consolidation and Summary of Significant Accounting Policies - Schedule of Antidilutive Securities (Details) - shares	12 Months Ended
	Mar. 31, 2026	Mar. 31, 2025
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities excluded from computation of earnings per share	25,016,476	23,811,102
Options \| The 2019 Omnibus Equity Incentive Plan
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities excluded from computation of earnings per share	4,457,368	3,239,642
Warrant
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities excluded from computation of earnings per share	20,559,108	20,571,460

Basis of Presentation, Principles of Consolidation and Summary of Significant Accounting Policies - Narrative (Details) $ in Thousands	12 Months Ended
	Mar. 31, 2026 USD ($) segment	Mar. 31, 2025 USD ($)
Property, Plant, and Equipment [Line Items]
Accumulated deficit	$ 477,317	$ 407,632
Cash used in operations	66,436	42,097
Cash, cash equivalents, and marketable securities	$ 45,400	$ 80,500
Expiration period	10 years
Number of reportable segments \| segment	1
Options
Property, Plant, and Equipment [Line Items]
Expiration period	10 years
Dividend yield	0.00%	0.00%
Minimum
Property, Plant, and Equipment [Line Items]
Property, Plant and Equipment, Useful Life (Year)	3 years
Maximum
Property, Plant, and Equipment [Line Items]
Property, Plant and Equipment, Useful Life (Year)	10 years

Fair Value Measurements

12 Months Ended

Mar. 31, 2026

Fair Value Disclosures [Abstract]

Fair Value Measurements

The following tables show our cash, cash equivalents and marketable securities at fair value as of March 31, 2026 and 2025 (in thousands):


	March 31, 2026
	Level 1		Level 2		Level 3		Total
Assets:
Cash and cash equivalents:
Cash and money market funds	$	30,789	$	—	$	—	$	30,789
Marketable securities
U.S. treasury securities	—		14,614		—		14,614
Total	$	30,789	$	14,614	$	—	$	45,403


	March 31, 2025
	Level 1		Level 2		Level 3		Total
Assets:
Cash and cash equivalents:
Cash and money market funds	$	67,131	$	—	$	—	$	67,131
Marketable securities
U.S. treasury securities	—		13,351		—		13,351
Total	$	67,131	$	13,351	$	—	$	80,482

The carrying amounts of our prepaid and other current assets, accounts payable, and accrued liabilities, approximate fair value due to their short term nature. We had no financial liabilities measured at fair value on a recurring basis at March 31, 2026 or 2025. There were no transfers between Levels 1, 2 or 3 for any of the periods presented.

Our marketable securities consist solely of U.S. Treasury notes, for which the expected credit loss is considered to be zero. Accordingly, no allowance for credit losses has been recorded on our available-for-sale debt securities as of March 31, 2026 or 2025.

The following table summarizes our marketable securities as of March 31, 2026 and 2025 (in thousands):


		March 31, 2026
	Maturity (in years)	Amortized Cost		Unrealized Gains		Unrealized Losses		Fair Value
U.S. treasury notes	Less than 1	$	14,616	$	2	$	(4)	$	14,614
Total		$	14,616	$	2	$	(4)	$	14,614


		March 31, 2025
	Maturity (in years)	Amortized Cost		Unrealized Gains		Unrealized Losses		Fair Value
U.S. treasury notes	Less than 1	$	13,346	$	5	$	—	$	13,351
Total		$	13,346	$	5	$	—	$	13,351

- Definition

The entire disclosure for the fair value of financial instruments (as defined), including financial assets and financial liabilities (collectively, as defined), and the measurements of those instruments as well as disclosures related to the fair value of non-financial assets and liabilities. Such disclosures about the financial instruments, assets, and liabilities would include: (1) the fair value of the required items together with their carrying amounts (as appropriate); (2) for items for which it is not practicable to estimate fair value, disclosure would include: (a) information pertinent to estimating fair value (including, carrying amount, effective interest rate, and maturity, and (b) the reasons why it is not practicable to estimate fair value; (3) significant concentrations of credit risk including: (a) information about the activity, region, or economic characteristics identifying a concentration, (b) the maximum amount of loss the entity is exposed to based on the gross fair value of the related item, (c) policy for requiring collateral or other security and information as to accessing such collateral or security, and (d) the nature and brief description of such collateral or security; (4) quantitative information about market risks and how such risks are managed; (5) for items measured on both a recurring and nonrecurring basis information regarding the inputs used to develop the fair value measurement; and (6) for items presented in the financial statement for which fair value measurement is elected: (a) information necessary to understand the reasons for the election, (b) discussion of the effect of fair value changes on earnings, (c) a description of [similar groups] items for which the election is made and the relation thereof to the balance sheet, the aggregate carrying value of items included in the balance sheet that are not eligible for the election; (7) all other required (as defined) and desired information.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 820
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Reference 2: http://www.xbrl.org/2003/role/exampleRef
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Reference 3: http://www.xbrl.org/2003/role/exampleRef
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Reference 4: http://www.xbrl.org/2003/role/disclosureRef
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Reference 5: http://www.xbrl.org/2003/role/disclosureRef
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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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Reference 8: http://www.xbrl.org/2003/role/disclosureRef
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Reference 9: http://www.xbrl.org/2003/role/disclosureRef
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Reference 10: http://www.xbrl.org/2003/role/disclosureRef
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Reference 11: http://www.xbrl.org/2003/role/disclosureRef
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Reference 12: http://www.xbrl.org/2003/role/disclosureRef
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Reference 13: http://www.xbrl.org/2003/role/disclosureRef
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-Paragraph 1
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+ Details

Capital Stock (Tables)

12 Months Ended

Mar. 31, 2026

Equity [Abstract]

Schedule of Common Stock Warrants Outstanding

At March 31, 2026, the following common stock warrants were outstanding:


Number of common shares underlying warrants	Exercise price per share	Expiration date
2,788,620	$0.001	N/A
9,294,022	$5.380	(a)
11,265,086	$8.877	10/4/2028

(a) The warrants will expire 60 days after the later of (i) the date on which the Company first publicly discloses, whether by press release or Form 8-K filing, the top-line data for its PALISADE-3 Phase 3 clinical trial of fasedienol for the acute treatment of anxiety in adults with SAD, which occurred in December 2025, and (ii) the date on which the Company first publicly discloses, whether by press release or Form 8-K filing, the top-line data for its PALISADE-4 Phase 3 clinical trial of fasedienol for the acute treatment of anxiety in adults with SAD.

Schedule of Common Stock Reserved for Future Issuance

We had the following shares of common stock reserved for future issuance:


	As of March 31,
	2026	2025
Issuance of common stock upon exercise of outstanding stock options under the Amended and Restated 2016 Stock Incentive Plan and the Amended and Restated 2019 Omnibus Equity Incentive Plan and inducement awards granted outside of the 2019 Plan	4,457,368	3,239,642
Issuance of common stock upon exercise of outstanding warrants	43,907,097	43,952,783
Equity awards available under the Amended and Restated 2019 Omnibus Equity Incentive Plan	1,122,097	2,042,153
Shares available for issuance under the 2019 Employee Stock Purchase Plan	693,558	911,342
Shares reserved under the Sales Agreement	17,548,172	27,951,416
	67,728,292	78,097,336

- Definition

Tabular disclosure of an entity's stock, including par or stated value per share, number and dollar amount of share subscriptions, shares authorized, shares issued, shares outstanding, number and dollar amount of shares held in an employee trust, dividend per share, total dividends, share conversion features, par value plus additional paid in capital, the value of treasury stock and other information necessary to a fair presentation, and EPS information. Stock by class includes common, convertible, and preferred stocks which are not redeemable or redeemable solely at the option of the issuer. Includes preferred stock with redemption features that are solely within the control of the issuer and mandatorily redeemable stock if redemption is required to occur only upon liquidation or termination of the reporting entity. If more than one issue is outstanding, state the title of each issue and the corresponding dollar amount; dollar amount of any shares subscribed but unissued and the deduction of subscriptions receivable there from; number of shares authorized, issued, and outstanding.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 505
-SubTopic 10
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Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef
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Reference 4: http://www.xbrl.org/2009/role/commonPracticeRef
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Reference 5: http://www.xbrl.org/2009/role/commonPracticeRef
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Reference 6: http://www.xbrl.org/2009/role/commonPracticeRef
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Reference 7: http://www.xbrl.org/2009/role/commonPracticeRef
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Reference 8: http://www.xbrl.org/2009/role/commonPracticeRef
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Reference 13: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 505
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-Name Accounting Standards Codification
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-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481112/505-10-50-5

Reference 14: http://www.xbrl.org/2009/role/commonPracticeRef
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-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1

Reference 15: http://www.xbrl.org/2009/role/commonPracticeRef
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Reference 16: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 210
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-Section S50
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-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480657/210-10-S50-11

+ Details

Property and Equipment, Net - Schedule of Property and Equipment (Details) - USD ($) $ in Thousands	Mar. 31, 2026	Mar. 31, 2025
Property, Plant, and Equipment [Line Items]
Gross property and equipment, net	$ 1,500	$ 1,880
Accumulated depreciation and amortization	(1,073)	(1,404)
Property and equipment, net	427	476
Laboratory equipment
Property, Plant, and Equipment [Line Items]
Gross property and equipment, net	854	1,335
Tenant improvements
Property, Plant, and Equipment [Line Items]
Gross property and equipment, net	194	221
Computer equipment
Property, Plant, and Equipment [Line Items]
Gross property and equipment, net	49	31
Software
Property, Plant, and Equipment [Line Items]
Gross property and equipment, net	184	57
Office furniture and equipment
Property, Plant, and Equipment [Line Items]
Gross property and equipment, net	8	25
Manufacturing equipment
Property, Plant, and Equipment [Line Items]
Gross property and equipment, net	$ 211	$ 211

Accrued Expenses - Schedule of Accrued Expenses (Details) - USD ($) $ in Thousands	Mar. 31, 2026	Mar. 31, 2025
Payables and Accruals [Abstract]
Accrued research and development costs	$ 7,886	$ 5,207
Accrued employee compensation costs	323	3,360
Accrued legal and professional service fees	493	234
Other	53	9
Total accrued expenses	$ 8,755	$ 8,810

Property and Equipment, Net (Tables)

12 Months Ended

Mar. 31, 2026

Property, Plant, and Equipment [Abstract]

Schedule of Property and Equipment, Net

Property and equipment, net consisted of the following (in thousands):


	As of March 31,
	2026		2025
Laboratory equipment	$	854	$	1,335
Tenant improvements	194		221
Computer equipment	49		31
Software	184		57
Office furniture and equipment	8		25
Manufacturing equipment	211		211
	1,500		1,880
Accumulated depreciation and amortization	(1,073)		(1,404)
Property and equipment, net	$	427	$	476

Sublicense and Collaborative Agreements - Narrative (Details) - USD ($) $ in Thousands		1 Months Ended	12 Months Ended
	Sep. 01, 2023	Aug. 31, 2020	Mar. 31, 2026	Mar. 31, 2025	Mar. 31, 2021
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Short-term deferred revenue			$ 1,710	$ 2,588
Long-term deferred revenue			0	391
Revenue			1,269	486
Collaborative Arrangement, AffaMed Agreement
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Sublicense Fees					$ 400
Unregistered shares of common stock issued (in shares)					7,788
Value unregistered shares of common stock issued					$ 100
Capitalized deferred contract acquisition costs					$ 500
Collaborative Arrangement, AffaMed Agreement \| License
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Upfront license payment		$ 5,000
Maximum milestone payments permitted		$ 172,000
Short-term deferred revenue			400	1,300
Long-term deferred revenue				400
Revenue			1,300	$ 500
Negotiation Agreement \| Fuji Pharma
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Short-term deferred revenue			$ 1,300
Collaborative arrangement, termination period option one	14 months
Collaborative arrangement, termination period option two	90 days
Collaborative arrangement, upfront payment	$ 1,500

Insider Trading Policies and Procedures	12 Months Ended
Insider Trading Policies and Procedures	Mar. 31, 2026
Insider Trading Policies and Procedures [Line Items]
Insider Trading Policies and Procedures Adopted	true

Fair Value Measurements - Narrative (Details) - Recurring - USD ($) $ in Thousands	Mar. 31, 2026	Mar. 31, 2025
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Financial liabilities measured at fair value	$ 0	$ 0
Allowance for credit loss	$ 0	$ 0

- Definition

Fair value of financial obligations, including, but not limited to, debt instruments, derivative liabilities, federal funds purchased and sold under agreements to repurchase, securities loaned or sold under agreements to repurchase, financial instruments sold not yet purchased, guarantees, line of credit, loans and notes payable, servicing liability, and trading liabilities.

+ References + Details

Segment Information (Details)	12 Months Ended
Segment Information (Details)	Mar. 31, 2026 segment
Segment Reporting [Abstract]
Number of operating segments	1

Capital Stock - Schedule of Warrants Outstanding (Details)	Mar. 31, 2026 $ / shares shares
Class of Warrant or Right [Line Items]
Expiration period	60 days
Warrants With Exercise Price of $0.001
Class of Warrant or Right [Line Items]
Number of common shares underlying warrants (in shares) \| shares	2,788,620
Exercise price per share (in dollars per share) \| $ / shares	$ 0.001
Warrants With Exercise Price of $5.380
Class of Warrant or Right [Line Items]
Number of common shares underlying warrants (in shares) \| shares	9,294,022
Exercise price per share (in dollars per share) \| $ / shares	$ 5.380
Warrants Expiring October 4, 2028
Class of Warrant or Right [Line Items]
Number of common shares underlying warrants (in shares) \| shares	11,265,086
Exercise price per share (in dollars per share) \| $ / shares	$ 8.877

Income Taxes

12 Months Ended

Mar. 31, 2026

Income Tax Disclosure [Abstract]

Income Taxes

10. Income Taxes

For the fiscal years ended March 31, 2026 and 2025, the Company's pre-tax loss of $69.7 million and $51.4 million, respectively, was derived entirely from U.S. operations. The Company had no foreign operations during either period.

For each of the fiscal years ended March 31, 2026 and 2025, income tax expense consisted of current state income tax expense of approximately $7,000, with no federal, foreign or deferred income tax expense in either period.

Income tax expense (benefit) differed from the amounts computed by applying the statutory federal income tax rate of 21% to pretax income (loss) as a result of the following:


	Year Ended March 31,
	2026				2025
	Amount		%		Amount		%
Computed expected tax benefit	$	(14,633)	(21.00)	%	$	(10,798)	(21.00)	%
State income taxes, net of federal benefit	7		0.01	%	7		0.01	%

Tax effect of research and development credits	(748)		(1.08)	%	(2,204)		(4.29)	%
Tax effect of stock compensation	—		—	%	309		0.60	%
Tax effect of other non-deductible items	430		0.62	%	618		1.20	%

Change in valuation allowance (federal only)	13,998		20.09	%	11,923		23.20	%
All other	953		1.37	%	152		0.29	%
Income tax expense	$	7	0.01	%	$	7	0.01	%

The 'All other' reconciling item for fiscal year 2026 consists of a return-to-provision adjustment relating to the difference between the estimated tax provision recorded as of March 31, 2025 and the actual amounts reflected in the fiscal year 2025 income tax return.

Income taxes paid, net of refunds received, for the years ended March 31, 2026 and 2025 were as follows (in thousands):


	Year ended March 31,
	2026		2025
Federal	$	—	$	—
State	3		—

Foreign	—		—
Total income taxes paid, net of refunds	$	3	$	—

State and local income taxes paid during the fiscal year ended March 31, 2026 consisted primarily of income taxes paid to the Commonwealth of Massachusetts.

Deferred income taxes reflect the net tax effect of temporary differences between the carrying amounts of assets and liabilities for financial reporting purposes and the amounts used for income tax purposes. Significant components of our deferred tax assets are as follows (in thousands):


	March 31,
	2026		2025
Deferred tax assets:
Net operating loss carryovers	$	70,861	51,324
Basis differences in property and equipment	38		—
Research and development credit carryforwards	7,731		6,875
Stock based compensation	2,835		3,041
Operating lease Right-of-Use asset	31		37
Capitalized research and development costs	11,734		15,087
Deferred revenue	—		632
Accruals and other reserves	138		709
Total deferred tax assets	93,368		77,705
Valuation allowance	(93,368)		(77,681)
Total deferred tax assets net of valuation allowance	—		24
Deferred tax liabilities:
Intangibles	—		(12)
Basis differences in property and equipment	—		(12)
Total deferred tax liabilities	—		(24)
Net deferred tax asset (liability)	$	—	$	—

The valuation allowance increased by $15.7 million and $17.2 million during the fiscal years ended March 31, 2026 and 2025, respectively.

We continually evaluates the likelihood of the realization of the deferred tax assets and adjusts the carrying amount of the deferred tax assets by the valuation allowance to the extent the future realization of the deferred tax assets is more likely than not. We consider many factors when assessing the likelihood of future realization of its deferred tax assets, including its recent cumulative earnings experience by tax jurisdiction, expectation of future taxable income or loss, the carryforward periods available to us for tax reporting purposes and other relevant factors. As of March 31, 2026, based on our history of earnings and its assessment of future earnings, management does not believe that it is more likely than not that future taxable income will be sufficient to realize the deferred tax assets. Therefore, a full valuation allowance has been applied to the deferred tax assets.

As of March 31, 2026, we had U.S. federal net operating loss carryforwards of approximately $314.3 million. Federal net operating loss carryforwards of approximately $80.6 million generated through our fiscal year ended March 31, 2018 will expire in our fiscal years ending March 31, 2027 through March 31, 2038. Federal net operating loss carryforwards of approximately $233.7 million generated in fiscal years ending after March 31, 2018 will carry forward indefinitely, but are subject to an 80% taxable income limitation. As of March 31, 2026, we had state net operating loss carryforwards of approximately $63.7 million, which will expire in fiscal years ending in 2029 through 2045. State net operating loss carryforwards of approximately $10.8 million will carry forward indefinitely. We also have federal and state research and development tax credit carryforwards of approximately $8.6 million and $2.2 million, respectively. The federal tax credits will expire at various dates beginning with our fiscal year ending March 31, 2029 through March 31, 2045 unless previously utilized. The state tax credits do not expire and will carry forward indefinitely until utilized.

U.S. federal and state tax laws include substantial restrictions on the utilization of net operating loss carryforwards in the event of a change in a corporation's ownership. We have not performed a change in ownership analysis since our inception in 1998, and accordingly, some or all of our net operating loss carryforwards may not be available to offset future taxable income, if any

On July 4, 2025, the One Big Beautiful Bill was enacted (“OBBBA”), introducing significant and wide-ranging changes to the U.S. federal tax system. Significant components include restoration of 100% accelerated tax depreciation on qualifying property including expansion to cover qualified production property. Another major aspect includes the return to immediate expensing of domestic research and experimental expenditures (“R&E”) which in some cases may include retroactive application back to 2021 for businesses with gross receipts of less than $31 million or accelerated tax deductions of R&E that was previously capitalized for larger businesses. The legislation also reinstates EBITDA-based interest deductions for tax purposes and makes several business tax incentives permanent. Less favorable business provisions include limitations on tax deductions for charitable contributions.

The provisions of OBBBA most relevant to us are the restoration of immediate expensing for domestic R&E expenditures and the related transition rules for amounts previously capitalized under TCJA. For the fiscal year ended March 31, 2026, our first tax year subject to OBBBA, domestic R&E expenditures are currently deductible. With respect to the remaining unamortized balance of domestic R&E previously capitalized for tax years 2022 through 2024, we elected to continue amortizing the balance over its remaining recovery period. Because we maintain a full valuation allowance against its deferred tax assets, these changes did not result in a net income tax provision impact. We have not yet evaluated whether it qualifies for the small-business retroactive expensing election under OBBBA, which is available to taxpayers with average annual gross receipts of $31 million or less. The other significant provisions of OBBBA, including the changes to international tax rules (NCTI, FDDEI, and BEAT) and the modifications to Section 163(j) and bonus depreciation, do not have a material impact on us because it has no foreign operations, limited interest expense, and limited property and equipment.

We file income tax returns in the U.S. federal, and various U.S. state jurisdictions. We are subject to U.S. federal and state income tax examinations by tax authorities for tax years 2004 through 2026 due to net operating losses that are being carried forward for tax purposes, but we are not currently under examination by tax authorities in any jurisdiction.

Uncertain Tax Positions

As required by the uncertain tax position guidance in ASC No. 740, Income Taxes the we recognize the financial statement benefit of a tax position only after determining that the relevant tax authority would more likely than not sustain the position following an audit. For tax positions meeting the more-likely-than-not threshold, the amount recognized in the financial statements is the largest benefit that has a greater than 50% likelihood of being realized upon ultimate settlement with the relevant tax authority. We applied the uncertain tax position guidance in ASC 740 to all tax positions for which the statute of limitations remained open. Any estimates of tax contingencies contain assumptions and judgments about potential actions by taxing jurisdictions. Any interest and penalties related to uncertain tax positions would be included as part of the income tax provision.

Our unrecognized tax benefits at March 31, 2026 and 2025 relate entirely to research and development tax credits. The total amount of unrecognized tax benefits at March 31, 2026 and 2025 is $2.6 million and $2.4 million, respectively. If

recognized, none of the unrecognized tax benefits would impact our effective tax rate. The following table summarizes the activity related to our unrecognized tax benefits (in thousands):


	Year Ended March 31,
	2026		2025
Unrecognized benefit - beginning of period	$	2,399	$	4,931
Prior period position increases (decreases)	—		(3,329)
Current period tax position increases (decreases)	178		797
Unrecognized benefit - end of period	$	2,577	$	2,399

Our conclusions regarding uncertain tax positions may be subject to review and adjustment at a later date based upon ongoing analysis of or changes in tax laws, regulations and interpretations thereof as well as other factors.

Our policy is to recognize interest and penalties related to income taxes as components of interest expense and other expense, respectively. We incurred no interest or penalties related to unrecognized tax benefits in the years ended March 31, 2026 or 2025. We do not anticipate any significant changes in our uncertain tax positions within twelve months of this reporting date.

- Definition

The entire disclosure for income tax.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 942
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-Subparagraph (a)
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-URI https://asc.fasb.org/1943274/2147482603/740-30-50-2

+ Details

Leases - Schedule of Lease Cost (Details) - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2026	Mar. 31, 2025
Leases [Abstract]
Operating lease costs	$ 645	$ 645
Variable lease costs	421	309
Total lease cost	$ 1,066	$ 954

Income Taxes - Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Thousands	Mar. 31, 2026	Mar. 31, 2025
Deferred tax assets:
Net operating loss carryovers	$ 70,861	$ 51,324
Basis differences in property and equipment	38	0
Research and development credit carryforwards	7,731	6,875
Stock based compensation	2,835	3,041
Operating lease Right-of-Use asset	31	37
Capitalized research and development costs	11,734	15,087
Deferred revenue	0	632
Accruals and other reserves	138	709
Total deferred tax assets	93,368	77,705
Valuation allowance	(93,368)	(77,681)
Total deferred tax assets net of valuation allowance	0	24
Deferred tax liabilities:
Intangibles	0	(12)
Basis differences in property and equipment	0	(12)
Total deferred tax liabilities	0	(24)
Net deferred tax asset (liability)	$ 0	$ 0

Stock-Based Compensation - Summary of Stock Option Activity (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Mar. 31, 2026	Mar. 31, 2025
Options
Outstanding at beginning of period (in shares)	3,239,642
Granted (in shares)	1,831,827
Exercised (in shares)	(2,330)
Forfeited (in shares)	(482,103)
Expired (in shares)	(129,668)
Outstanding at end of period (in shares)	4,457,368	3,239,642
Weighted-Average Exercise Price
Outstanding at beginning of period (in dollars per share)	$ 10.32
Granted (in dollars per share)	2.31
Exercised (in dollars per share)	3.32
Forfeited (in dollars per share)	2.81
Expired (in dollars per share)	12.26
Outstanding at end of period (in dollars per share)	$ 7.78	$ 10.32
Exercisable (in shares)	2,419,193
Exercisable (in dollars per share)	$ 12.96
Exercisable, Weighted Average Remaining Contractual Term	6 years 9 months 18 days
Vested and Expected to Vest
Outstanding (in shares)	4,457,368
Weighted Average Exercise Price (in dollars per share)	$ 7.78
Weighted-Average Remaining Contractual Term (Years)	7 years 9 months 18 days
Aggregate Intrinsic Value	$ 0
Outstanding, weighted average remaining contractual term	7 years 9 months 18 days	8 years 4 months 24 days
Outstanding, Aggregate Intrinsic Value	$ 0	$ 0
Exercisable, Aggregate Intrinsic Value	$ 0

Income Taxes - Reconciliation of Income Tax Expense (Details) - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2026	Mar. 31, 2025
Amount
Computed expected tax benefit	$ (14,633)	$ (10,798)
State income taxes, net of federal benefit	7	7
Tax effect of research and development credits	(748)	(2,204)
Tax effect of stock compensation	0	309
Tax effect of other non-deductible items	430	618
Change in valuation allowance (federal only)	13,998	11,923
All other	953	152
Income Tax Expense (Benefit)	$ 7	$ 7
%
Computed expected tax benefit	(21.00%)	(21.00%)
State income taxes, net of federal benefit	0.01%	0.01%
Tax effect of research and development credits	(0.0108)	(0.0429)
Tax effect of stock compensation	0.00%	0.60%
Tax effect of other non-deductible items	0.62%	1.20%
Change in valuation allowance (federal only)	20.09%	23.20%
All other	1.37%	0.29%
Income tax expense	0.01%	0.01%

Capital Stock - Schedule of Common Stock Reserved for Future Issuance (Details) - shares	Mar. 31, 2026	Mar. 31, 2025
Statement [Line Items]
Common stock reserved for future issuance (in shares)	67,728,292	78,097,336
Common stock authorized but not reserved (in shares)	217,605,705
Issuance of common stock upon exercise of outstanding stock options under the Amended and Restated 2016 Stock Incentive Plan and the Amended and Restated 2019 Omnibus Equity Incentive Plan and inducement awards granted outside of the 2019 Plan
Statement [Line Items]
Common stock reserved for future issuance (in shares)	4,457,368	3,239,642
Equity awards available under the Amended and Restated 2019 Omnibus Equity Incentive Plan
Statement [Line Items]
Common stock reserved for future issuance (in shares)	1,122,097	2,042,153
Shares available for issuance under the 2019 Employee Stock Purchase Plan
Statement [Line Items]
Common stock reserved for future issuance (in shares)	693,558	911,342
Shares reserved under the Sales Agreement
Statement [Line Items]
Common stock reserved for future issuance (in shares)	17,548,172	27,951,416
Warrant
Statement [Line Items]
Common stock reserved for future issuance (in shares)	43,907,097	43,952,783

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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+ Details

Stock-Based Compensation

12 Months Ended

Mar. 31, 2026

Share-Based Payment Arrangement [Abstract]

Stock-Based Compensation

Equity Incentive Plans

2016 Equity Incentive Plan

Our 2016 Stock Incentive Plan (the 2016 Plan) provided for the grant of stock options, restricted shares of common stock, stock appreciation rights and dividend equivalent rights to employees, officers, members of the board of directors, consultants and advisors of the Company. Upon the adoption of our 2019 Plan, no further grants were permissible under the 2016 Plan and 46,280 authorized shares were transferred to the 2019 Plan and became issuable therefrom. Any options or awards outstanding under the 2016 Plan remained outstanding and effective.

2019 Equity Incentive Plan

Our Board approved the Vistagen Therapeutics, Inc. 2019 Omnibus Equity Incentive Plan (the 2019 Plan) on May 27, 2019, and our stockholders adopted it and ratified all previously issued grants on September 5, 2019. The 2019 Plan provides for the grant of stock options, stock appreciation rights, restricted stock, restricted stock units and other stock-based awards.

On June 28, 2021, our Board approved and, at our Annual Meeting of Stockholders on September 17, 2021, our stockholders approved certain amendments to the 2019 Plan (Amended 2019 Plan). Upon approval of the Amended 2019 Plan by our stockholders, the total number of shares authorized to be issued under the 2019 Plan increased to 600,000 shares. On May 29, 2024, our Board and stockholders approved certain amendments to the 2019 Plan (Amended and Restated 2019 Plan). Upon approval of the Amended and Restated 2019 Plan by our stockholders, the total number of shares authorized to be issued under the 2019 Plan increased to 5,000,000 shares.

At March 31, 2026, there were 1,122,097 registered shares of our common stock remaining available for grant under the Amended and Restated 2019 Plan.

Awards granted under our equity plans expire no later than 10 years from the date of grant. Options and restricted stock granted to employees typically vest over a four-year period but may have been granted with different vesting terms.

A summary of our stock option activity for the year ended March 31, 2026 is as follows (in thousands, except share and per share data and years):


	Options	Weighted-Average Exercise Price		Weighted-Average Remaining Contractual Term (Years)	Aggregate Intrinsic Value
Outstanding at March 31, 2025	3,239,642	$	10.32	8.4	$	—
Granted	1,831,827	$	2.31
Exercised	(2,330)	$	3.32
Forfeited	(482,103)	$	2.81
Expired	(129,668)	$	12.26
Outstanding at March 31, 2026	4,457,368	$	7.78	7.8	$	—
Exercisable at March 31, 2026	2,419,193	$	12.96	6.8	$	—
Vested and expected to vest as of March 31, 2026	4,457,368	$	7.78	7.8	$	—

Stock-Based Compensation Expense

The fair value of stock options granted was estimated using the following assumptions:


	Year Ended March 31,
	2026	2025
Risk-free interest rate	3.6 % - 4.2 %	3.5 % - 4.5 %
Expected term (years)	5.27 - 6.08	5.07 - 6.14
Expected stock price volatility	155.1% - 164.3%	163.4% - 176.2%
Dividend yield	—	—

Stock-based compensation expense recognized for all equity awards has been included in the consolidated statements of operations and comprehensive loss as follows (in thousands):


	Year Ended March 31,
	2026		2025

Research and development expense	$	1,732	$	1,938
General and administrative expense	2,265		2,377
Total stock-based compensation expense	$	3,997	$	4,315

The weighted-average grant date fair value of options granted for the years ended March 31, 2026 and 2025 was $2.21 and $3.45 per share, respectively. For the years ended March 31, 2026 and 2025, the total fair value of options vested was $4.1 million and $4.0 million, respectively. The aggregate intrinsic value of options exercised for the years ended March 31, 2026 and 2025 was $0. As of March 31, 2026, total compensation cost not yet recognized related to unvested stock options was $5.3 million, which is expected to be recognized over a weighted-average period of 1.9 years.

2019 Employee Stock Purchase Plan

Our Board approved the Vistagen Therapeutics, Inc. 2019 Employee Stock Purchase Plan (the 2019 ESPP) on June 13, 2019. Our stockholders approved the 2019 ESPP at our annual meeting on September 5, 2019. The 2019 ESPP is intended to qualify as an employee stock purchase plan under Section 423 of the Internal Revenue Code. A maximum of 33,334 shares of our common stock were originally reserved for purchase under the 2019 ESPP. In May 2024, the 2019 ESPP was amended to increase the shares authorized to be issued under the 2019 ESPP to 1,000,000 shares.

The 2019 ESPP permits eligible employees who elect to participate in an offering under the 2019 ESPP to have up to 15% of their eligible earnings withheld, subject to certain limitations, to purchase shares of common stock pursuant to the 2019 ESPP. The price of common stock purchased under the 2019 ESPP is equal to 85% of the lower of the fair market value of the common stock at the commencement date of each offering period or the relevant date of purchase. Each offering period is six months, with new offering periods commencing every six months on or about the dates of January 1 and July 1 of each year.

During the years ended March 31, 2026 and 2025, we issued 217,784 and 74,804 shares, respectively, of common stock in connection with the 2019 ESPP. As of March 31, 2026, there were 693,558 shares available for future purchase under the 2019 ESPP.

During the years ended March 31, 2026 and 2025, we recognized an immaterial amount of expense under the 2019 ESPP.

Cover - USD ($) $ in Millions	12 Months Ended
Cover - USD ($) $ in Millions	Mar. 31, 2026	Jun. 12, 2026	Sep. 30, 2025
Cover [Abstract]
Document Type	10-K
Document Annual Report	true
Document Period End Date	Mar. 31, 2026
Current Fiscal Year End Date	--03-31
Document Transition Report	false
Entity File Number	001-37761
Entity Registrant Name	Vistagen Therapeutics, Inc.
Entity Incorporation, State or Country Code	NV
Entity Tax Identification Number	20-5093315
Entity Address, Address Line One	343 Allerton Avenue
Entity Address, City or Town	South San Francisco
Entity Address, State or Province	CA
Entity Address, Postal Zip Code	94080
City Area Code	650
Local Phone Number	577-3600
Title of 12(b) Security	Common Stock, par value $0.001 per share
Trading Symbol	VTGN
Security Exchange Name	NASDAQ
Entity Well-known Seasoned Issuer	No
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Non-accelerated Filer
Entity Small Business	true
Entity Emerging Growth Company	false
ICFR Auditor Attestation Flag	false
Document Financial Statement Error Correction [Flag]	false
Entity Shell Company	false
Entity Public Float			$ 137.7
Entity Common Stock, Shares Outstanding		41,032,453
Amendment Flag	false
Document Fiscal Year Focus	2026
Document Fiscal Period Focus	FY
Entity Central Index Key	0001411685

Capital Stock - Open Market Sale Agreement (Details) $ in Thousands	1 Months Ended			12 Months Ended
	Jun. 30, 2025 USD ($)	Feb. 29, 2024 USD ($)	May 31, 2021 USD ($)	Mar. 31, 2026 USD ($) shares	Mar. 31, 2025 USD ($) shares
ATM Facility
Capital Unit [Line Items]
Proceeds from issuance of common stock				$ 30,637	$ 3,009
Jefferies LLC \| ATM Facility
Capital Unit [Line Items]
Maximum aggregate offering price	$ 175,000	$ 100,000	$ 75,000
Issuance of common stock under Open Market Sale Agreement, net of issuance costs (in shares) \| shares				10,403,244	1,108,587
Proceeds from issuance of common stock				$ 30,600	$ 3,000
Commission on shares sold, percentage			0.030
Jefferies LLC \| Shares reserved under the Sales Agreement
Capital Unit [Line Items]
Remaining amount available				$ 140,500

- Definition

Number of new stock issued during the period.

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+ Details

Related Party Transactions	12 Months Ended
Related Party Transactions	Mar. 31, 2026
Related Party Transactions [Abstract]
Related Party Transactions	Related Party Transactions In August 2023, in connection with his retirement, we entered into a consulting agreement, as subsequently amended, with our former Chief Financial Officer, Jerrold D. Dotson, to assist in transition matters related to the employment of our new Chief Financial Officer. The agreement currently expires December 31, 2026. We incurred expenses under the agreement of $120,000 and $120,000, during the years ended March 31, 2026 and 2025, respectively.

- Definition

The entire disclosure for related party transactions. Examples of related party transactions include transactions between (a) a parent company and its subsidiary; (b) subsidiaries of a common parent; (c) and entity and its principal owners; and (d) affiliates.

+ References

+ Details

Capital Stock - Warrant Exercises, Expirations and Modifications (Details) - $ / shares	12 Months Ended
	Mar. 31, 2026	Mar. 31, 2025
Class of Stock [Line Items]
Weighted average exercise price (in dollars per share)	$ 7.30
Outstanding warrants subject to anti-dilution protection feature (in shares)	0
Exercise of warrants (in shares)		788,620
Warrants expired during period (in shares)	12,352	33,334
Warrants exercised during period, exercise price (in dollars per share)	$ 21.90	$ 15.00
Conversion of Warrants
Class of Stock [Line Items]
Shares issued for the exercise of warrants (in shares)		788,359

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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+ Details

- Definition

Number of shares issued during the period as a result of the conversion of convertible securities.

+ References

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+ Details

Insider Trading Arrangements	3 Months Ended
Insider Trading Arrangements	Mar. 31, 2026
Trading Arrangements, by Individual
Rule 10b5-1 Arrangement Adopted	false
Non-Rule 10b5-1 Arrangement Adopted	false
Rule 10b5-1 Arrangement Terminated	false
Non-Rule 10b5-1 Arrangement Terminated	false

Property and Equipment, Net - Narrative (Details) - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2026	Mar. 31, 2025
Lease for Office Equipment Fully-depreciated
Property, Plant, and Equipment [Line Items]
Depreciation	$ 200	$ 200

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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+ Details

Leases - Schedule of Future Minimum Lease Payments for Non-Cancellable Operating Leases (Details) - USD ($) $ in Thousands	Mar. 31, 2026	Mar. 31, 2025
Leases [Abstract]
2027	$ 754
2028	254
Thereafter	0
Total minimum lease payments	1,008
Less: amount representing interest	(60)
Present value of operating lease liabilities	948
Less: operating lease liabilities - current portion	(699)	$ (561)
Operating lease liabilities - non-current portion	$ 249	$ 948

Commitments, Contingencies, Guarantees and Indemnifications	12 Months Ended
	Mar. 31, 2026
Commitments and Contingencies Disclosure [Abstract]
Commitments, Contingencies, Guarantees and Indemnifications	Commitments, Contingencies, Guarantees and Indemnifications From time to time, we may be party to litigation, arbitration or other legal proceedings in the course of our business, such as (i) the civil action filed against the Company and its Board of Directors, certain of its executive officers, professional services and financial advisors, and industry analysts in the United States District Court for the Northern District of California (Case No. 4:25-cv-01510) on February 13, 2025, by two purported stockholders seeking compensatory and punitive damages, as well as fees and costs, (ii) the stockholder derivative action filed by the same purported stockholders in the District of Nevada (Case No. 2:26-cv-01128) on April 10, 2026, (iii) the punitive class action filed in the Northern District of California (Case No. 3:26-cv-00427) on January 15, 2026, and (iv) the stockholder derivative actions filed in the Northern District of California (Case Nos. 4:26-cv-02656 and 3:26-cv-04480) on March 26, 2026 and May 13, 2026, respectively. The Company believes all allegations in these legal proceedings are wholly without merit, and intends to vigorously defend itself. The outcome of any such legal proceedings, regardless of the merits, is inherently uncertain. In addition, litigation and related matters are costly and may divert the attention of our management and other resources that would otherwise be engaged in other activities. If we were unable to prevail in any such legal proceedings, our business, results of operations, liquidity, and financial condition could be adversely affected.

Accrued Expenses (Tables)

12 Months Ended

Mar. 31, 2026

Payables and Accruals [Abstract]

Schedule of Accrued Expenses

Accrued expenses are composed of the following (in thousands):


	As of March 31,
	2026		2025
Accrued research and development costs	$	7,886	$	5,207
Accrued employee compensation costs	323		3,360
Accrued legal and professional service fees	493		234
Other	53		9
Total accrued expenses	$	8,755	$	8,810

Leases

12 Months Ended

Mar. 31, 2026

Leases [Abstract]

Leases

Operating Lease

We have a single lease for our headquarters, which includes office and laboratory space, in South San Francisco, California. The lease commenced in April 2013, and was subsequently amended in 2016 to extend the lease term to July 31, 2022, and included one five-year extension option. For the purpose of determining the right-of-use asset and associated lease liability, we determined that we would likely exercise the five-year extension option through July 2027. On October 14, 2021, we entered into an amendment to the lease (the Lease Amendment), pursuant to which the term of the lease was

extended from August 1, 2022 to July 31, 2027. Under the terms of the Lease Amendment, we have the option to renew the lease for an additional five-year term commencing on August 1, 2027. We did not include this renewal option in determining the lease term, as we were not reasonably certain to exercise either renewal option.

The following table summarizes the effect of operating lease costs in our consolidated statements of operations (in thousands):


	Year Ended March 31,
	2026		2025
Operating lease costs	$	645	$	645
Variable lease costs	421		309
Total lease cost	$	1,066	$	954

Maturities of lease liabilities as of March 31, 2026 were as follows (in thousands):


Year ending March 31,	Amount
2027	$	754
2028	254
Thereafter	—
Total minimum lease payments	1,008
Less: amount representing interest	(60)
Present value of operating lease liabilities	948
Less: operating lease liabilities - current portion	(699)
Operating lease liabilities - non-current portion	$	249

The lease had a remaining term of 1.3 years and 2.3 years as of March 31, 2026 and 2025, respectively. The lease liability was calculated based on a weighted-average discount rate of 8.54% as of March 31, 2026 and 2025. During the years ended March 31, 2026 and 2025, we made cash payments for amounts included in the measurement of lease liabilities of $0.7 million and $0.8 million, respectively.

Subsequent Events (Details) - ATM Facility - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended	12 Months Ended
	Jun. 15, 2026	Mar. 31, 2026	Mar. 31, 2025
Subsequent Event [Line Items]
Proceeds from issuance of common stock		$ 30,637	$ 3,009
Jefferies LLC
Subsequent Event [Line Items]
Issuance of common stock under Open Market Sale Agreement, net of issuance costs (in shares)		10,403,244	1,108,587
Proceeds from issuance of common stock		$ 30,600	$ 3,000
Subsequent Event \| Jefferies LLC
Subsequent Event [Line Items]
Issuance of common stock under Open Market Sale Agreement, net of issuance costs (in shares)	1,412,136
Weighted average price ( in dollars per share)	$ 0.6052
Proceeds from issuance of common stock	$ 833

- Definition

Number of new stock issued during the period.

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+ Details

Stock-Based Compensation - Narrative (Details) - USD ($) $ / shares in Units, $ in Millions		12 Months Ended
	Sep. 05, 2019	Mar. 31, 2026	Mar. 31, 2025	May 29, 2024	Sep. 17, 2021
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Expiration period		10 years
Weighted average grant date fair value (in dollars per share)		$ 2.21	$ 3.45
Total fair value of options vested		$ 4.1	$ 4.0
Aggregate intrinsic value of options exercised		0.0	$ 0.0
Total compensation cost not yet recognized		$ 5.3
Options
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Expiration period		10 years
Vesting period		4 years
Unrecognized share-based compensation cost, period of recognition		1 year 10 months 24 days
Restricted Stock
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Vesting period		4 years
Employee Stock
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Number of shares authorized (in shares)	33,334			1,000,000
Number of remaining shares available for grant (in shares)		693,558
ESPP maximum eligible earnings withheld contribution percentage	15.00%
Fair value of common stock percentage	85.00%
Offering period	6 months
Issued (in shares)		217,784	74,804
The 2016 Plan
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Number of shares authorized (in shares)	0
The 2019 Plan
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Number of authorized shares transferred (in shares)	46,280
The Amended 2019 Plan
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Number of shares authorized (in shares)				5,000,000	600,000
Number of remaining shares available for grant (in shares)		1,122,097

Stock-Based Compensation - Schedule of Fair Value of Options Granted (Details) - Options	12 Months Ended
	Mar. 31, 2026	Mar. 31, 2025
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Dividend yield	0.00%	0.00%
Minimum
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Risk-free interest rate	360.00%	350.00%
Expected term (years)	5 years 3 months 7 days	5 years 25 days
Expected stock price volatility	155.10%	163.40%
Maximum
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Risk-free interest rate	420.00%	450.00%
Expected term (years)	6 years 29 days	6 years 1 month 20 days
Expected stock price volatility	164.30%	176.20%

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

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+ Details

Stock-Based Compensation - Schedule of Stock-Based Compensation Expense Recognized (Details) - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2026	Mar. 31, 2025
Share-Based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Total stock-based compensation expense	$ 3,997	$ 4,315
Income Statement Location [Axis]: us-gaap:GeneralAndAdministrativeExpense
Share-Based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Total stock-based compensation expense	2,265	2,377
Income Statement Location [Axis]: us-gaap:ResearchAndDevelopmentExpense
Share-Based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Total stock-based compensation expense	$ 1,732	$ 1,938

Audit Information	12 Months Ended
Audit Information	Mar. 31, 2026
Auditor [Abstract]
Auditor Name	KPMG LLP
Auditor Location	San Francisco, California
Auditor Firm ID	185

Income Taxes - Schedule of Income Taxes Paid (Details) - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2026	Mar. 31, 2025
Income Tax Disclosure [Abstract]
Federal	$ 0	$ 0
State	3	0
Foreign	0	0
Total income taxes paid, net of refunds	$ 3	$ 0

Consolidated Balance Sheets (Parenthetical) - $ / shares	Mar. 31, 2026	Mar. 31, 2025
Statement of Financial Position [Abstract]
Preferred stock, par value (in dollars per share)	$ 0.001	$ 0.001
Preferred stock, shares authorized (in shares)	10,000,000	10,000,000
Preferred stock, outstanding (in shares)	0	0
Common stock, par value (in dollars per share)	$ 0.001	$ 0.001
Common stock, shares authorized (in shares)	325,000,000	325,000,000
Common stock, shares issued (in shares)	39,624,839	29,001,481
Treasury stock, shares (in shares)	4,522	4,522

- Definition

The maximum number of nonredeemable preferred shares (or preferred stock redeemable solely at the option of the issuer) permitted to be issued by an entity's charter and bylaws.

+ References + Details

- Definition

Aggregate share number for all nonredeemable preferred stock (or preferred stock redeemable solely at the option of the issuer) held by stockholders. Does not include preferred shares that have been repurchased.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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+ Details

Capital Stock

12 Months Ended

Mar. 31, 2026

Equity [Abstract]

Capital Stock

Common Stock

October 2023 Public Offering

On October 2, 2023, we completed an underwritten public offering (the October 2023 Public Offering), whereby we offered and sold, for gross proceeds of approximately $100 million, a total of 15,010,810 shares of our common stock and a total of 3,577,240 pre-funded warrants to purchase up to 3,577,240 shares of common stock (the Pre-Funded Warrants). Each share of common stock and each Pre-Funded Warrant was issued together with a ratably allocated portion of warrants to purchase up to 9,294,022 shares of common stock with an exercise price of $5.38 per share (the T1 Warrants) and warrants to purchase 11,265,086 shares of common stock with an exercise price of $8.877 per share (the T2 Warrants). The net proceeds to us from the October 2023 Public Offering were approximately $93.5 million, after deducting expenses related to the offering, including commissions, legal expenses and other offering costs.

The Pre-Funded Warrants, T1 Warrants and T2 Warrants (collectively, the Warrants) are fully exercisable, only at the option of the holder. Holders may also exercise the T1 Warrants and T2 Warrants for Pre-Funded Warrants at their option. We may not effect the exercise of any Warrants, and a holder will not be entitled to exercise any portion of any of the Warrants, which, upon giving effect to such exercise, would cause the aggregate number of shares of common stock beneficially owned by the holder of such Warrant (together with its affiliates) to exceed 9.99% of the number of shares of common stock outstanding immediately after giving effect to the exercise. However, any holder may increase or decrease such percentage to any other percentage (not to exceed 19.99% if exceeding such percentage would result in a change of control under Nasdaq Listing Rule 5636(b) or any successor rule) upon at least 61 days’ prior notice from the holder to us subject to the terms of the respective warrant agreement.

We evaluated the terms of the Warrants issued and determined that they should be classified as equity instruments within additional paid-in capital. The Pre-Funded Warrants are equity classified because they (i) are freestanding financial instruments that are legally detachable and separately exercisable from the other equity instruments, (ii) are immediately exercisable, (iii) do not embody an obligation for the Company to repurchase its shares, (iv) permit the holders to receive a fixed number of shares of common stock upon exercise, (v) are indexed to the Company’s common stock and (vi) meet the equity classification criteria. In addition, such Pre-Funded Warrants do not provide any guarantee of value or return.

Open Market Sale Agreement

In May 2021, we entered into an Open Market Sale Agreement (the Sales Agreement) with Jefferies LLC (Jefferies) which enabled us, in our sole discretion, to offer and sell, from time to time, shares of our common stock for aggregate gross proceeds of up to $75.0 million. In February 2024, the aggregate gross proceeds available under the Sales Agreement was increased to $100 million, and in June 2025, the aggregate offering price available under the Sales Agreement was increased to up to $175 million. As of March 31, 2026, approximately $140.5 million of common stock remained available for sale under the Sales Agreement.

During the years ended March 31, 2026 and 2025, we sold an aggregate of 10,403,244 and 1,108,587 shares, respectively, under the Sales Agreement, for net proceeds of $30.6 million and $3.0 million, respectively, after sales agent commissions. We pay Jefferies a commission of up to three percent (3.0%) of the aggregate gross proceeds from any sales under the Sales Agreement.

We record transactions under the Sales Agreement on a settlement date basis. All legal fees and accounting expenses incurred in connection with the Sales Agreement are recorded as Deferred Offering Costs and are amortized to Additional Paid-in Capital as sales of shares are made under the Sales Agreement. The Sales Agreement will terminate upon the earlier of (i) the sale of all shares subject to the Sales Agreement or (ii) the termination of the Sales Agreement by Jefferies or by us, as permitted.

Refer to Note 15, Subsequent Events, for information regarding sales of common stock under the Sales Agreement after March 31, 2026.

Warrant Exercises, Expirations and Modifications

At March 31, 2026, the following common stock warrants were outstanding:


Number of common shares underlying warrants	Exercise price per share	Expiration date
2,788,620	$0.001	N/A
9,294,022	$5.380	(a)
11,265,086	$8.877	10/4/2028

The weighted average exercise price of all outstanding warrants at March 31, 2026 is $7.30 per share. No outstanding warrant is subject to any down-round anti-dilution protection feature. All outstanding warrants are exercisable by the holders only by payment in cash of the stated exercise price per share, except the Pre-Funded Warrants and the T2 Warrants issued in connection with the October 2023 Public Offering, which may be exercised through a cashless exercise, via exchange of a portion of warrants to cover the exercise price.

There were no warrants exercised during the year ended March 31, 2026. During the year ended March 31, 2025, Pre-Funded Warrants to purchase 788,620 shares of common stock were exercised on a cashless basis, resulting in the issuance of 788,359 shares of common stock.

During the years ended March 31, 2026 and 2025, warrants to purchase 12,352 and 33,334 shares of common stock expired, with a weighted average exercise prices of $21.90 and $15.00 per share, respectively.

Reserved Shares

We had the following shares of common stock reserved for future issuance:


	As of March 31,
	2026	2025
Issuance of common stock upon exercise of outstanding stock options under the Amended and Restated 2016 Stock Incentive Plan and the Amended and Restated 2019 Omnibus Equity Incentive Plan and inducement awards granted outside of the 2019 Plan	4,457,368	3,239,642
Issuance of common stock upon exercise of outstanding warrants	43,907,097	43,952,783
Equity awards available under the Amended and Restated 2019 Omnibus Equity Incentive Plan	1,122,097	2,042,153
Shares available for issuance under the 2019 Employee Stock Purchase Plan	693,558	911,342
Shares reserved under the Sales Agreement	17,548,172	27,951,416
	67,728,292	78,097,336

At March 31, 2026, we have 217,605,705 authorized shares of our common stock not subject to reserves and available for future issuance.

- Definition

The entire disclosure for equity.

+ References

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-URI https://asc.fasb.org/1943274/2147479921/505-20-S99-1

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+ Details

Accrued Expenses

12 Months Ended

Mar. 31, 2026

Payables and Accruals [Abstract]

Accrued Expenses

Accrued expenses are composed of the following (in thousands):


	As of March 31,
	2026		2025
Accrued research and development costs	$	7,886	$	5,207
Accrued employee compensation costs	323		3,360
Accrued legal and professional service fees	493		234
Other	53		9
Total accrued expenses	$	8,755	$	8,810

Subsequent Events	12 Months Ended
Subsequent Events	Mar. 31, 2026
Subsequent Events [Abstract]
Subsequent Events	Subsequent Events We evaluated subsequent events through June 15, 2026, the date these consolidated financial statements were issued. Sales Under the Open Market Sale Agreement From April 1, 2026 through June 12, 2026, we sold an aggregate of 1,412,136 shares of common stock under the Sales Agreement at a weighted average price of $0.6052 per share and received net cash proceeds of approximately $833,000.

Sublicense and Collaborative Agreements - Schedule of Changes in Contract Assets and Contract Liabilities (Details) - Collaborative Arrangement $ in Thousands	12 Months Ended
	Mar. 31, 2026 USD ($)
Contract assets:
Balance at March 31, 2025	$ 130
Additions	0
Deductions	(74)
Balance at March 31, 2026	56
Contract liabilities:
Balance at March 31, 2025	2,979
Additions	0
Deductions	(1,269)
Balance at March 31, 2026	$ 1,710

Fair Value Measurements - Cash, Cash Equivalents and Marketable Securities (Details) - USD ($) $ in Thousands	Mar. 31, 2026	Mar. 31, 2025
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total	$ 45,403	$ 80,482
Cash and money market funds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash equivalents held in money market funds	30,789	67,131
U.S. treasury securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Marketable securities	14,614	13,351
Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total	30,789	67,131
Level 1 \| Cash and money market funds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash equivalents held in money market funds	30,789	67,131
Level 1 \| U.S. treasury securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Marketable securities	0	0
Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total	14,614	13,351
Level 2 \| Cash and money market funds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash equivalents held in money market funds	0	0
Level 2 \| U.S. treasury securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Marketable securities	14,614	13,351
Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total	0	0
Level 3 \| Cash and money market funds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash equivalents held in money market funds	0	0
Level 3 \| U.S. treasury securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Marketable securities	$ 0	$ 0

- Definition

Amount of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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+ Details

Income Taxes (Tables)

12 Months Ended

Mar. 31, 2026

Income Tax Disclosure [Abstract]

Schedule of Effective Income Tax Rate Reconciliation

Income tax expense (benefit) differed from the amounts computed by applying the statutory federal income tax rate of 21% to pretax income (loss) as a result of the following:


	Year Ended March 31,
	2026				2025
	Amount		%		Amount		%
Computed expected tax benefit	$	(14,633)	(21.00)	%	$	(10,798)	(21.00)	%
State income taxes, net of federal benefit	7		0.01	%	7		0.01	%

Tax effect of research and development credits	(748)		(1.08)	%	(2,204)		(4.29)	%
Tax effect of stock compensation	—		—	%	309		0.60	%
Tax effect of other non-deductible items	430		0.62	%	618		1.20	%

Change in valuation allowance (federal only)	13,998		20.09	%	11,923		23.20	%
All other	953		1.37	%	152		0.29	%
Income tax expense	$	7	0.01	%	$	7	0.01	%

Schedule of Income Taxes Paid

Income taxes paid, net of refunds received, for the years ended March 31, 2026 and 2025 were as follows (in thousands):


	Year ended March 31,
	2026		2025
Federal	$	—	$	—
State	3		—

Foreign	—		—
Total income taxes paid, net of refunds	$	3	$	—

Schedule of Deferred Tax Assets and Liabilities

Significant components of our deferred tax assets are as follows (in thousands):


	March 31,
	2026		2025
Deferred tax assets:
Net operating loss carryovers	$	70,861	51,324
Basis differences in property and equipment	38		—
Research and development credit carryforwards	7,731		6,875
Stock based compensation	2,835		3,041
Operating lease Right-of-Use asset	31		37
Capitalized research and development costs	11,734		15,087
Deferred revenue	—		632
Accruals and other reserves	138		709
Total deferred tax assets	93,368		77,705
Valuation allowance	(93,368)		(77,681)
Total deferred tax assets net of valuation allowance	—		24
Deferred tax liabilities:
Intangibles	—		(12)
Basis differences in property and equipment	—		(12)
Total deferred tax liabilities	—		(24)
Net deferred tax asset (liability)	$	—	$	—

Schedule of Unrecognized Tax Benefits Roll Forward

The following table summarizes the activity related to our unrecognized tax benefits (in thousands):


	Year Ended March 31,
	2026		2025
Unrecognized benefit - beginning of period	$	2,399	$	4,931
Prior period position increases (decreases)	—		(3,329)
Current period tax position increases (decreases)	178		797
Unrecognized benefit - end of period	$	2,577	$	2,399

Income Taxes - Uncertain Tax Positions (Details) - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2026	Mar. 31, 2025
Unrecognized Tax Benefits [Roll Forward]
Unrecognized benefit - beginning of period	$ 2,399	$ 4,931
Prior period position decreases	0	(3,329)
Current period tax position increases (decreases)	178	797
Unrecognized benefit - end of period	$ 2,577	$ 2,399

Property and Equipment, Net

12 Months Ended

Mar. 31, 2026

Property, Plant, and Equipment [Abstract]

Property and Equipment, Net

Property and equipment, net consisted of the following (in thousands):


	As of March 31,
	2026		2025
Laboratory equipment	$	854	$	1,335
Tenant improvements	194		221
Computer equipment	49		31
Software	184		57
Office furniture and equipment	8		25
Manufacturing equipment	211		211
	1,500		1,880
Accumulated depreciation and amortization	(1,073)		(1,404)
Property and equipment, net	$	427	$	476

We recognized depreciation expense of $0.2 million and $0.2 million for the years ended March 31, 2026 and 2025, respectively.

- Definition

The entire disclosure for property, plant, and equipment. Includes, but is not limited to, land and land improvement; building; machinery and equipment; furniture and fixture; and work of art, historical treasure, or similar asset classified as collection.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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-Section 50
-Paragraph 3
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+ Details

Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2026	Mar. 31, 2025
Cash flows from operating activities:
Net loss	$ (69,685)	$ (51,418)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation and amortization	199	150
Loss on disposal of fixed assets	0	0
Stock-based compensation	3,997	4,315
Amortization of operating lease right-of-use asset	534	485
Accretion of marketable securities	(543)	(389)
Changes in operating assets and liabilities:
Prepaid expenses and other current assets	36	(88)
Other assets	(46)	190
Operating lease liability	(561)	(611)
Deferred sublicense revenue, net of deferred contract acquisition costs	(1,195)	(412)
Accounts payable and accrued expenses	828	5,681
Net cash used in operating activities	(66,436)	(42,097)
Cash flows from investing activities:
Purchases of laboratory and other equipment	(151)	(191)
Sales and maturities of marketable securities	21,575	12,027
Purchases of marketable securities	(22,301)	(24,984)
Net cash used in investing activities	(877)	(13,148)
Cash flows from financing activities:
Proceeds from issuance of common stock and warrants, net of issuance costs	8	0
Issuance of note payable for insurance policy	1,020	0
Repayment of note payable	(925)	0
Net cash provided by financing activities	30,971	3,210
Net increase (decrease) in cash and cash equivalents	(36,342)	(52,035)
Cash and cash equivalents at beginning of period	67,131	119,166
Cash and cash equivalents at end of period	30,789	67,131
Supplemental disclosure of cash flow information:
Cash paid for interest	33	0
ATM Facility
Cash flows from financing activities:
Proceeds from issuance of common stock	30,637	3,009
Equity Line
Cash flows from financing activities:
Proceeds from issuance of common stock	$ 231	$ 201

Consolidated Statements of Stockholders' Equity - USD ($) $ in Thousands	Total	Shares reserved under the Sales Agreement	Common Stock	Common Stock Shares reserved under the Sales Agreement	Additional Paid-in Capital	Additional Paid-in Capital Shares reserved under the Sales Agreement	Treasury Stock	Accumulated Other Comprehensive Income (Loss)	Accumulated Deficit
Beginning balance (in shares) at Mar. 31, 2024			27,029,731
Beginning balance at Mar. 31, 2024	$ 114,286		$ 27		$ 474,441		$ (3,968)	$ 0	$ (356,214)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock-based compensation expense	4,315				4,315
Sale of common stock pursuant to 2019 Employee Stock Purchase Plan (in shares)			74,804
Sale of common stock pursuant to 2019 Employee Stock Purchase Plan	201				201
Issuance of common stock under Open Market Sale Agreement, net of issuance costs (in shares)				1,108,587
Issuance of common stock under Open Market Sale Agreement, net of issuance costs		$ 3,000		$ 1		$ 2,999
Issuance of common stock upon exercise of Pre-Funded Warrants (in shares)			788,359
Issuance of common stock upon exercise of Pre-Funded Warrants	1		$ 1
Net loss	(51,418)								(51,418)
Ending balance (in shares) at Mar. 31, 2025			29,001,481
Ending balance at Mar. 31, 2025	70,390		$ 29		481,956		(3,968)	5	(407,632)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock-based compensation expense	3,997				3,997
Sale of common stock pursuant to 2019 Employee Stock Purchase Plan (in shares)			217,784
Sale of common stock pursuant to 2019 Employee Stock Purchase Plan	231				231
Unrealized loss on marketable securities available-for-sale, net	(7)							(7)
Issuance of common stock under Open Market Sale Agreement, net of issuance costs (in shares)			10,403,244
Issuance of common stock under Open Market Sale Agreement, net of issuance costs	$ 30,586		$ 11		30,575
Issuance of common stock upon exercise of stock options (in shares)	1,831,827		2,330
Issuance of common stock upon exercise of stock options	$ 8				8
Net loss	(69,685)								(69,685)
Ending balance (in shares) at Mar. 31, 2026			39,624,839
Ending balance at Mar. 31, 2026	$ 35,520		$ 40		$ 516,767		$ (3,968)	$ (2)	$ (477,317)

Consolidated Balance Sheets - USD ($) $ in Thousands	Mar. 31, 2026	Mar. 31, 2025
Current assets:
Cash and cash equivalents	$ 30,789	$ 67,131
Marketable securities	14,614	13,351
Prepaid expenses and other current assets	1,540	1,594
Total current assets	46,943	82,076
Property and equipment, net	427	476
Right-of-use asset - operating lease	801	1,335
Other assets	393	454
Total assets	48,564	84,341
Current liabilities:
Accounts payable	1,535	653
Accrued expenses	8,755	8,810
Notes Payable	96	0
Deferred revenue - current portion	1,710	2,588
Less: operating lease liabilities - current portion	699	561
Total current liabilities	12,795	12,612
Deferred revenue - non-current portion	0	391
Operating lease liabilities - non-current portion	249	948
Total liabilities	13,044	13,951
Commitments and contingencies (Note 13)
Stockholders’ equity:
Preferred stock, $0.001 par value; 10,000,000 shares authorized at March 31, 2026 and March 31, 2025; no shares outstanding at March 31, 2026 and March 31, 2025	0	0
Common stock, $0.001 par value; 325,000,000 shares authorized at March 31, 2026 and March 31, 2025; 39,624,839 and 29,001,481 shares issued at March 31, 2026 and March 31, 2025, respectively	40	29
Additional paid-in capital	516,767	481,956
Treasury stock, at cost, 4,522 shares of common stock held at March 31, 2026 and March 31, 2025	(3,968)	(3,968)
Accumulated other comprehensive gain (loss)	(2)	5
Accumulated deficit	(477,317)	(407,632)
Total stockholders’ equity	35,520	70,390
Total liabilities and stockholders’ equity	$ 48,564	$ 84,341

Fair Value Measurements (Tables)

12 Months Ended

Mar. 31, 2026

Fair Value Disclosures [Abstract]

Schedule of Cash, Cash Equivalents and Marketable Securities at Fair Value

The following tables show our cash, cash equivalents and marketable securities at fair value as of March 31, 2026 and 2025 (in thousands):


	March 31, 2026
	Level 1		Level 2		Level 3		Total
Assets:
Cash and cash equivalents:
Cash and money market funds	$	30,789	$	—	$	—	$	30,789
Marketable securities
U.S. treasury securities	—		14,614		—		14,614
Total	$	30,789	$	14,614	$	—	$	45,403


	March 31, 2025
	Level 1		Level 2		Level 3		Total
Assets:
Cash and cash equivalents:
Cash and money market funds	$	67,131	$	—	$	—	$	67,131
Marketable securities
U.S. treasury securities	—		13,351		—		13,351
Total	$	67,131	$	13,351	$	—	$	80,482

Schedule of Marketable Securities

The following table summarizes our marketable securities as of March 31, 2026 and 2025 (in thousands):


		March 31, 2026
	Maturity (in years)	Amortized Cost		Unrealized Gains		Unrealized Losses		Fair Value
U.S. treasury notes	Less than 1	$	14,616	$	2	$	(4)	$	14,614
Total		$	14,616	$	2	$	(4)	$	14,614


		March 31, 2025
	Maturity (in years)	Amortized Cost		Unrealized Gains		Unrealized Losses		Fair Value
U.S. treasury notes	Less than 1	$	13,346	$	5	$	—	$	13,351
Total		$	13,346	$	5	$	—	$	13,351

- Definition

Tabular disclosure of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 320
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 3
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481800/320-10-50-3

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 320
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 9
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481800/320-10-50-9

Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 320
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481800/320-10-50-2

Reference 4: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 320
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (c)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481800/320-10-50-2

Reference 5: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 320
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481800/320-10-50-2

Reference 6: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 320
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (aa)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481800/320-10-50-2

Reference 7: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 320
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (aaa)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481800/320-10-50-2

Reference 8: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 320
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (d)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481800/320-10-50-2

Reference 9: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 320
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 3
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481800/320-10-50-3

Reference 10: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 320
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 3
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481800/320-10-50-3

Reference 11: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 320
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 3
-Subparagraph (c)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481800/320-10-50-3

Reference 12: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 320
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 3
-Subparagraph (d)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481800/320-10-50-3

+ Details

Basis of Presentation, Principles of Consolidation and Summary of Significant Accounting Policies (Policies)	12 Months Ended
	Mar. 31, 2026
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Use of Estimates	Use of Estimates The preparation of financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities, the 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. Estimates reflected in the accompanying consolidated financial statements include, but are not limited to, those relating to stock-based compensation, revenue recognition, research and development expenses, determination of right-of-use assets under lease transactions and related lease obligations, useful lives of property and equipment, deferred tax assets and liabilities and the related valuation allowance, and the assumptions used to value warrants. We base our estimates on historical experience, known trends and other market-specific or other relevant factors that we believe to be reasonable under the circumstances. Actual results could differ from those estimates.
Concentration of Credit Risk	Concentration of Credit Risk Financial instruments which potentially subject us to significant concentration of credit risk consist of cash and cash equivalents. We maintain deposits in federally insured financial institutions in excess of federally insured limits. We have not experienced any losses in such accounts, and management believes that we are not exposed to significant credit risk due to the nature of the instruments held in the depository institutions.
Cash and Cash Equivalents	Cash and Cash Equivalents Cash and cash equivalents are considered to be highly liquid investments with maturities of three months or less at the date of purchase. Cash equivalents primarily represent funds invested in readily available money market accounts and short-term treasury notes. As of March 31, 2026, we had cash and cash equivalents balances deposited at multiple major financial institutions.
Property and Equipment	Property and Equipment Property and equipment is stated at cost and depreciated using the straight-line method over the estimated useful lives of the assets (generally three to ten years, or the remaining term of the lease). Repairs and maintenance costs are expensed as incurred, while expenditures that extend the useful life of an asset or add new functionality are capitalized and depreciated over the remaining useful life of the related asset.
Impairment of Long-Lived Assets	Impairment of Long-Lived Assets We evaluate our long-lived assets, which consist of property and equipment and right-of-use assets, whenever events or changes in circumstances indicate that the carrying amount of such assets may not be recoverable. Recoverability of assets to be held and used is measured by a comparison of the carrying amount of an asset to the future undiscounted net cash flows expected to be generated by the asset. If such assets are considered to be impaired, the impairment to be recognized is measured by the amount by which the carrying amount of the asset exceeds the fair value of the asset. To date, we have not recorded any impairment losses on long-lived assets.
Deferred Offering Costs	Deferred Offering Costs Deferred offering costs include registration expenses related to our current registration statement on SEC Form S-3, which became effective on February 29, 2024, and expenses related to the Sales Agreement (as described in Note 8, Capital Stock). These expenses consist primarily of legal, accounting, SEC filing fees, and, as appropriate, Nasdaq filing fees. Upon the completion or partial completion of an applicable equity offering, the deferred expenses are charged to additional paid-in capital. If there are any deferred offering costs remaining at the expiration of our current registration statement on SEC Form S-3 or the equity financing agreement, or if the financing is abandoned, terminated or significantly delayed, such costs are charged to expense.
Revenue Recognition	Revenue Recognition Under ASC Topic 606, we recognize revenue when our customer obtains control of promised goods or services, in an amount that reflects the consideration that we expect to be entitled to in exchange for those goods or services. To determine revenue recognition for arrangements that we determine are within the scope of Topic 606, we perform the following five steps: (i) identify the contract with a customer; (ii) identify the performance obligations in the contract; (iii) determine the transaction price, including variable consideration, if any; (iv) allocate the transaction price to the performance obligations in the contract; and (v) recognize revenue when (or as) we satisfy a performance obligation. We only apply the five-step model to contracts when it is probable that we will collect the consideration to which we are entitled in exchange for the goods or services we transfer to a customer. At contract inception, once the contract is determined to be within the scope of ASC 606, we assess whether the goods or services promised within each contract are distinct and, therefore, represent a separate performance obligation. Goods and services that are determined not to be distinct are combined with other promised goods and services until a distinct combined performance obligation is identified. We then allocate the transaction price (that is, the amount of consideration we expect to be entitled to from a customer in exchange for the promised goods or services) to each performance obligation and recognize the associated revenue when (or as) each performance obligation is satisfied. Our estimate of the transaction price for each contract includes all variable consideration to which we expect to be entitled, subject to the constraint on variable consideration. Variable consideration is not constrained if the potential reversal of cumulative revenue recognized at the contract level is not significant. License Rights — If the license to our intellectual property (IP) is determined to be distinct from the other promises or performance obligations identified in the arrangement, which generally include research and development services, we recognize revenue from non-refundable, upfront fees allocated to the license when the license is transferred to the customer and the customer is able to use and benefit from the license. In assessing whether a license is distinct from the other promises, we consider relevant facts and circumstances of each arrangement, including the research and development capabilities of the collaboration partner and the availability of the associated expertise in the general marketplace. In addition, we consider whether the collaboration partner can benefit from the license for its intended purpose without the receipt of the remaining promises, whether the value of the license is dependent on the unsatisfied promises, whether there are other vendors that could provide the remaining promises and whether it is separately identifiable from the remaining promises. For licenses that are combined with other promises, we utilize judgment to assess the nature of the combined performance obligation and whether the license is the predominant promise within the combined performance obligation to determine whether the combined performance obligation is satisfied over time or at a point in time and, if over time, the appropriate method of measuring progress for purposes of recognizing revenue. If the license is the predominant promise, and it is determined that the license represents functional IP, revenue is recognized at the point in time when control of the license is transferred. If it is determined that the license does not represent functional IP, revenue is recognized over time using an appropriate method of measuring progress. Customer Options — Our arrangements may provide a collaborator with the right to acquire additional goods or services in the future. If an arrangement is determined to contain customer options that allow the customer to acquire additional goods or services, the additional goods and services underlying the customer options are evaluated in order to determine if these additional goods or services are distinct from those included as a performance obligation at the outset of the arrangement. If the additional services are not determined to be distinct, the variable consideration pertaining to the customer option is added to the initial transaction price at the time in which the option exercise becomes probable. Any such adjustments to the transaction price are recorded on a cumulative catch-up basis, which would affect revenues and earnings in the period of adjustment. If the additional services are distinct, we evaluate the customer options for material rights, or options to acquire additional goods or services for free or at a discount. Material rights are recognized as a separate performance obligation at the inception of the arrangement. We allocate the transaction price to material rights based on the relative stand-alone selling price, which is determined based on the identified discount and the probability that the customer will exercise the option. Amounts allocated to a material right are not recognized as revenue until, at the earliest, the option is exercised or expires. Milestone Payments — At the inception of an arrangement that includes development milestone payments, we evaluate whether the milestones are considered likely to be achieved and estimate the amount to be included in the transaction price using the most likely amount method. If it is probable that a significant reversal of cumulative revenue recognized would not occur, the associated milestone value is included in the transaction price. Milestone payments that are not within our control, such as regulatory approvals, are not considered probable to be achieved until those approvals are received. We evaluate factors such as the scientific, clinical, regulatory, commercial and other risks that must be overcome to achieve the particular milestone in making this assessment. There is considerable judgment involved in determining whether it is probable that a significant revenue reversal would not occur. At the end of each subsequent reporting period, we reevaluate the probability of achievement of all milestones subject to constraint and, if necessary, adjusts its estimate of the overall transaction price. Any such adjustments are recorded on a cumulative catch-up basis, which would affect revenues and earnings in the period of adjustment. Royalties — For arrangements that include sales-based royalties, including milestone payments based on a level of sales, where the license is deemed to be the predominant item to which the royalties relate, we recognize revenue at the later of (i) when the related sales occur or (ii) when the performance obligation to which some or all of the royalty has been allocated has been satisfied (or partially satisfied). To date, we have not recognized any royalty revenue resulting from licensing agreements. Amounts due to us for satisfying the revenue recognition criteria or that are contractually due based upon the terms of the collaboration agreements are recorded as accounts receivable on the consolidated balance sheets. Amounts received prior to satisfying the revenue recognition criteria are recorded as deferred revenue. Amounts expected to be recognized as revenue within the one year following the balance sheet date are classified as current deferred revenue. Amounts not expected to be recognized as revenue within the one year following the balance sheet date are classified as deferred revenue, net of current portion.
Research and Development Expenses and Accruals	Research and Development Expenses and Accruals Research and development expenses are composed of both internal and external costs. Internal costs include salaries and employment-related expenses, including stock-based compensation expense, of scientific personnel and direct project costs. External research and development expenses consist primarily of costs associated with clinical and nonclinical development programs and are charged to expense as incurred. We have entered into various research and development contracts with clinical research organizations, clinical development and manufacturing organizations, clinical sites and other vendors and consultants. Payments for these activities are based on the terms of the individual agreements, which may differ from the pattern of costs incurred, and payments made in advance of or after the performance are reflected in the accompanying balance sheets as prepaid expenses or accrued liabilities, respectively. When evaluating the adequacy of the accrued liabilities, we analyze progress of the services, including the phase or completion of events, invoices received and contracted costs. We hold discussions with relevant employees and outside service providers as to assess the progress of clinical trials and services performed. Significant judgments and estimates may be made in determining the prepaid or accrued balances at the end of any reporting period. Actual results could differ from our estimates. Nonrefundable advance payments for goods and services, including fees for process development, are deferred and recognized as expenses in the period that the related goods are consumed or services are performed.
Income Taxes	Income Taxes We account for income taxes using the asset and liability approach promulgated by ASC 740, Income Taxes, for financial reporting purposes. Deferred tax assets and liabilities are recognized for the future tax consequences attributable to differences between the financial statement carrying amounts of existing assets and liabilities and their respective tax bases and operating loss and tax credit carryforwards. Deferred tax assets and liabilities are measured using enacted tax rates expected to apply to taxable income in the years in which those temporary differences are expected to be recovered or settled. The effect on deferred tax assets and liabilities of a change in tax rates is recognized in income in the period that includes the enactment date. Valuation allowances are established, when necessary, to reduce the deferred tax assets to an amount expected to be realized. Uncertain tax positions, for which our assessment is that there is a more than 50% probability of sustaining the position upon challenge by a taxing authority based on its technical merits, are subject to certain recognition and measurement criteria. The nature of the uncertain tax positions is often very complex and subject to change, and the amounts at issue can be substantial. We develop our cumulative probability assessment of the measurement of uncertain tax positions using internal experience, judgment and assistance from our professional advisors. We re-evaluate these uncertain tax positions on a quarterly basis based on a number of factors including, but not limited to, changes in facts or circumstances, changes in tax law, and effectively settled issues under audit and new audit activity. Any change in these factors could result in the recognition of a tax benefit or an additional charge to the tax provision. Effective April 1, 2025, we adopted ASU 2023-09, Income Taxes (Topic 740): Improvements to Income Tax Disclosures, on a prospective basis. ASU 2023-09 requires enhanced disclosures related to the effective tax rate reconciliation and income taxes paid. The adoption resulted in expanded disclosures in Note 10, Income Taxes, and did not affect our consolidated financial position, results of operations, or cash flows.
Leases	Leases At the inception of a contractual agreement, we determine whether the contract is or contains a lease, by assessing whether there is an identified asset and whether the contract conveys the right to control the use of the identified asset in exchange for consideration over a period of time. If both criteria are met, we record the associated lease liability and corresponding right-of-use asset upon commencement of the lease using the implicit rate or a discount rate based on a credit-adjusted secured borrowing rate commensurate with the term of the lease. When determining the lease term, we include options to extend or terminate the lease when it is reasonably certain, at inception, that we will exercise that option. Additionally, we evaluate leases at their inception to determine if they are to be accounted for as an operating lease or a finance lease. Operating lease assets represent our right to use an underlying asset for the lease term (Right-of-use assets) and operating lease liabilities represent our obligation to make lease payments arising from the lease. The lease payments used to determine our operating lease assets may include lease incentives, stated rent increases and escalation clauses linked to rates of inflation, when determinable, and are recognized in determining our Right-of-use assets. Operating lease liabilities with a term greater than one year and their corresponding right-of-use assets are recognized on the balance sheets at the commencement date of the lease based on the present value of lease payments over the expected lease term. We exclude short-term leases, if any, having initial terms of 12 months or less at lease commencement as an accounting policy election. Variable lease payments are amounts owed by us to a lessor that are not fixed, such as reimbursement for common area maintenance costs for our facility lease; and are expensed when incurred. Operating right-of-use assets are reflected in right-of-use assets in the accompanying balance sheets. Operating lease liabilities are reflected in operating lease obligations, current and non-current in the accompanying balance sheets. Financing leases, formerly referred to as capitalized leases, are treated similarly to operating leases except that the asset subject to the lease is included in the appropriate fixed asset category, rather than recorded as a Right-of-use asset, and depreciated over its estimated useful life, or lease term, if shorter. We have not entered into any financing leases as of the balance sheet dates presented.
Internal-Use Software Development Costs	Internal-Use Software Development Costs We capitalize qualifying costs incurred during the application development stage related to software developed for internal-use and amortize them over the estimated useful life of three years. Amortization of such costs begins when the project is substantially complete and ready for its intended use. Capitalized software development costs are classified as property and equipment, net on the consolidated balance sheet. We expense costs incurred related to the planning and post-implementation phases of development as incurred.
Stock-Based Compensation	Stock-Based Compensation Stock-based compensation is accounted for in accordance with ASC 718, Compensation - Stock Compensation (ASC 718) and is measured at the grant date fair value for employee, officer, director and non-employee equity awards and is recognized over the requisite service period, which is generally the vesting period. We recognize forfeitures as they occur. Stock-based compensation is classified in the Consolidated Statements of Operations and Comprehensive Loss in the same manner in which the recipient's payroll or fees are classified. The fair value of stock options is estimated using a Black-Scholes valuation model on the date of grant. This method requires that certain assumptions be used as inputs, such as the fair value of the underlying common stock, expected term of the option before exercise, expected volatility of our common stock, risk-free interest rate and expected dividend. Options granted have a maximum contractual term of ten years. We have limited historical stock option activity and therefore estimate the expected term of stock options granted using the simplified method, which represents the arithmetic average of the original contractual term of the stock option and its weighted-average vesting term. The expected volatility of stock options is estimated based on the average historical volatility of our own common stock. The risk-free interest rates used are based on the U.S. Treasury yield in effect at the time of grant for zero-coupon U.S. treasury notes with maturities approximately equal to the expected term of the stock options. We have historically not declared or paid any dividends and we do not currently expect to do so in the foreseeable future, and therefore have estimated the dividend yield to be zero.
Fair Value Measurements	Fair Value Measurements We measure certain assets and liabilities at fair value on a recurring basis. Fair value is defined as the exchange price that would be received for an asset or paid to transfer a liability (an exit price) in the principal or most advantageous market for the asset or liability in an orderly transaction between market participants at the measurement date. We use a three-tier fair value hierarchy to prioritize the inputs used in measuring fair value, which are as follows: •Level 1 — Unadjusted quoted prices in active markets that are accessible at the measurement date for identical assets or liabilities. •Level 2 — Quoted prices for similar assets and liabilities in active markets, quoted prices in markets that are not active, or inputs which are observable, either directly or indirectly, for substantially the full term of the asset or liability. •Level 3 — Prices or valuation techniques that require inputs that are both significant to the fair value measurement and unobservable (i.e. supported by little or no market activity). Money market funds are highly liquid investments and are classified as Level 1. The pricing information for these assets is readily available and can be independently validated as of the measurement date. Available-for sale debt securities are valued using observable inputs from similar assets, or from observable data in markets that are not active. These assets are classified as Level 2.
Warrants Issued In Connection with Equity Financing	Warrants Issued in Connection with Equity Financing We evaluate the appropriate balance sheet classification of warrants we issue as either equity or as a derivative liability. In accordance with ASC 815-40, Derivatives and Hedging-Contracts in the Entity’s Own Equity (ASC 815-40), we classify a warrant as equity if it is “indexed to the Company’s equity” and meets several specific conditions for equity classification. A warrant is not considered “indexed to the Company’s equity,” in general, when it contains certain types of exercise contingencies or potential adjustments to its exercise price. If a warrant is not indexed to the Company’s equity or it has net cash settlement provisions that result in the warrants being accounted for under ASC 480, Distinguishing Liabilities from Equity or ASC 815-40, it is classified as a derivative liability which is carried on the consolidated balance sheets at fair value with any changes in its fair value recognized immediately in the Statements of Operations and Comprehensive Loss. At March 31, 2026 and 2025 all of our outstanding warrants were classified as equity.
Comprehensive Loss	Comprehensive Loss Comprehensive loss includes net loss as well as other changes in shareholders’ equity that result from transactions and economic events other than those with shareholders. For the year ended March 31, 2026, these changes related to unrealized gains and losses on our available-for-sale short-term investments. There were no reclassifications out of comprehensive loss for the years ended March 31, 2026 and 2025, respectively.
Net Loss Per Share	Net Loss Per Share We calculate basic and diluted net loss per share attributable to common stockholders in conformity with the two-class method required for participating securities. Certain warrants participate in distributions of the Company. The Pre-Funded Warrants associated with the October 2023 Public Offering (see Note 8 below) are considered outstanding shares in the basic earnings per share calculation given their nominal exercise price. The net loss attributable to common stockholders is not allocated to the warrant holders as the holders of warrants do not have a contractual obligation to share in losses. Basic net loss per share is calculated by dividing the net loss by the weighted-average number of common shares outstanding for the period. Diluted net loss per share is computed by dividing the net loss by the weighted-average number of shares of common stock and common stock equivalents outstanding for the period. Common stock equivalents are only included when their effect is dilutive. Our potentially dilutive securities, including outstanding warrants to purchase common stock and outstanding stock options under our equity incentive plan, have been excluded from the computation of diluted net loss per share as their inclusion would be anti-dilutive. For all periods presented, there is no difference in the number of shares used to calculate basic and diluted shares outstanding due to our net loss position.
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 in making decisions regarding resource allocation and assessing performance. We manage our operations as a single reportable segment for the purposes of assessing performance and making operating decisions.
Related Parties	Related Parties Transactions between related parties are considered to be related party transactions even though they may not be given accounting recognition. ASC 850, Related Party Disclosures (ASC 850) requires that transactions with related parties that would make a difference in decision-making shall be disclosed so that users of the financial statements can evaluate their significance.
Recently Adopted Accounting Principles and Issued Accounting Pronouncements Not Yet Adopted	Recently Adopted Accounting Principles In December 2023, the FASB issued ASU No. 2023-09, Income Taxes (Topic 740): Improvements to Income Tax Disclosures. ASU 2023-09 requires disaggregated information about a reporting entity’s effective tax rate reconciliation as well as information on income taxes paid. ASU 2023-09 is effective for public entities with annual periods beginning after December 15, 2024, with early adoption permitted. The Company adopted ASU 2023-09 on a prospective basis effective April 1, 2025, resulting in enhanced income tax disclosures. See Note 10, Income Taxes, for the enhanced disclosures required under ASU 2023-09. 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), which requires disaggregated disclosure of certain expense categories on the face of the income statement or in the notes. ASU 2024-03 is effective for annual reporting periods beginning after December 15, 2026, and for interim reporting periods within annual reporting periods beginning after December 15, 2027. For us, this means the standard will first apply to our annual financial statements for the year ending March 31, 2028, and to our interim financial statements beginning with the quarter ending June 30, 2028. Early adoption is permitted. We are currently evaluating the impact of adoption. In September 2025, the FASB issued ASU 2025-06, Intangibles — Goodwill and Other Internal-Use Software (Subtopic 350-40): Targeted Improvements to the Accounting for Internal-Use Software. This guidance modernizes the accounting framework for internal-use software by providing clearer criteria for capitalization, including the requirement to assess whether significant development uncertainty exists. ASU 2025-06 is effective for annual reporting periods beginning after December 15, 2027, and interim reporting periods within those annual reporting periods. For us, this means the standard will first apply to our annual and interim financial statements beginning with the fiscal year ending March 31, 2029. Early adoption is permitted. We are currently evaluating the impact of this guidance on our consolidated financial statements. In December 2025, the FASB issued ASU 2025-11, Interim Reporting (Topic 270): Narrow-Scope Improvements, which provides clarity on the required interim disclosures under Topic 270 by providing a comprehensive list of required interim disclosures, and clarifies the applicability of Topic 270. ASU 2025-11 is effective for interim reporting periods within fiscal years beginning after December 15, 2027. For us, this means the standard will first apply to our interim financial statements beginning with the quarter ending June 30, 2028. ASU 2025-11 may be adopted on a prospective or retrospective basis, and early adoption is permitted. We are currently evaluating the impact of this guidance on our consolidated financial statements. In December 2025, the FASB issued ASU 2025-12, Codification Improvements, which includes 33 amendments to the Accounting Standards Codification intended to clarify existing guidance, correct technical errors, and address minor inconsistencies across a broad range of topics. ASU 2025-12 is effective for the Company for annual reporting periods beginning after December 15, 2026. For us, this means the standard will first apply to our annual financial statements for the year ending March 31, 2028. Early adoption is permitted. We have evaluated the amendments in ASU 2025-12 and do not expect adoption to have a material impact on our consolidated financial statements or disclosures. We have considered all other recently issued accounting pronouncements and do not believe any are relevant to, or will have a material impact on, our consolidated financial position, results of operations, or cash flows other than those discussed above.

Sublicense and Collaborative Agreements

12 Months Ended

Mar. 31, 2026

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Sublicense and Collaborative Agreements


	Balance at March 31, 2025		Additions		Deductions		Balance at March 31, 2026
Contract assets:
Deferred contract acquisition costs	$	130	$	—	$	(74)	$	56
Contract liabilities:
Deferred revenue	$	2,979	$	—	$	(1,269)	$	1,710

AffaMed Agreement

In June 2020, we entered into a license and collaboration agreement (the AffaMed Agreement) with EverInsight Therapeutics Inc., a company incorporated under the laws of the British Virgin Islands, now AffaMed Therapeutics, Inc. (AffaMed), pursuant to which we granted AffaMed an exclusive license to develop and commercialize fasedienol for social anxiety disorder (SAD) and potentially other anxiety-related disorders in Greater China, South Korea and Southeast Asia (which includes Indonesia, Malaysia, Philippines, Thailand and Vietnam) (collectively, the Territory). AffaMed is responsible for all costs related to developing, obtaining regulatory approval of, and commercializing fasedienol for treatment of SAD, and potentially other anxiety-related indications, in the Territory. A joint development committee has been established between AffaMed and us to coordinate and review the development and commercialization plans with respect to fasedienol in the Territory.

We are responsible for pursuing clinical development and regulatory submissions of fasedienol for acute treatment of anxiety in adults with SAD, and potentially other anxiety-related indications, in the United States on a "best efforts" basis, with no guarantee of success. AffaMed may participate in the Phase 3 global clinical trial of fasedienol and will assume all direct costs and expenses of conducting such clinical trial in the Territory and a portion of the indirect costs of a global trial in which they participate. We will transfer all development data (nonclinical and clinical data) and our regulatory documentation related to fasedienol throughout the term as it is developed or generated or otherwise comes into our control. We will grant to AffaMed a Right of Reference to our regulatory documentation and our development data, but retain exclusive development and commercialization rights for fasedienol in the U.S. and throughout the rest of the world outside the Territory.

Under the terms of the AffaMed Agreement, AffaMed paid us a non-refundable upfront license payment of $5.0 million in August 2020. Additionally, upon successful development and commercialization of fasedienol in the Territory, we are eligible to receive milestone payments of up to $172.0 million. Further, we are eligible to receive royalty payments on a country-by-country basis on net sales for the later of ten years or the expiration of market or regulatory exclusivity in the jurisdiction. Royalty payments will be reduced in jurisdictions where there is no market exclusivity during the royalty period, and may be further reduced if there is generic competitive product present.

We have determined that we have one combined performance obligation for the license to develop and commercialize fasedienol in the Territory and related development and regulatory services. In addition, AffaMed has an option that, if exercised by AffaMed, could create manufacturing obligations for us during development upon exercise. This option for manufacturing services was evaluated and determined not to include a material right.

Development and commercialization milestones were not considered probable at inception and therefore were excluded from the initial transaction price. The royalties were excluded from the initial transaction price because they relate to a license of intellectual property and are subject to the royalty constraint.

We recognize revenue as the combined performance obligation is satisfied over time using an input method. Judgment is required to determine the level of effort attributable to the performance obligation included in the AffaMed Agreement and the period over which we expect to complete our performance obligation. The performance period or measure of progress was estimated at the inception of the AffaMed Agreement and is re-evaluated in subsequent reporting periods. This re-evaluation may shorten or lengthen the period over which we recognize revenue.

As of March 31, 2026 and 2025, we had short-term deferred revenue of $0.4 million and $1.3 million, respectively, related to the AffaMed Agreement. We had no long-term deferred revenue related to the AffaMed Agreement as of March 31, 2026 as compared to $0.4 million as of March 31, 2025. During the years ended March 31, 2026 and 2025, we recognized revenue of $1.3 million and $0.5 million, respectively, related to the performance obligation under the AffaMed Agreement, all of which was included in the deferred revenue balance at the beginning of each respective period. The remaining deferred revenue under the AffaMed Agreement will be recognized over the expected performance period.

Contract Acquisition Costs Related to the Affamed Agreement

In 2020, we made cash payments to Pherin aggregating $0.4 million for sublicense fees and consulting services exclusively related to the AffaMed Agreement. Additionally, in 2020 we issued 7,788 unregistered shares of our common stock, valued at $0.1 million, as partial compensation for consulting services exclusively related to the AffaMed Agreement. These sublicense fees and consulting payments and the fair value of the common stock issued, aggregating $0.5 million, were capitalized as other assets in our Consolidated Balance Sheets. Amortization expense related to the contract acquisition costs was immaterial for the years ended March 31, 2026 and 2025.

The AffaMed Agreement will expire on a jurisdiction-by-jurisdiction basis upon the latest to occur of expiration of the last valid claim under a licensed patent of fasedienol in such jurisdiction, the expiration of regulatory exclusivity in such jurisdiction or ten years after the first commercial sale of fasedienol in such jurisdiction.

Fuji Pharma Agreement

On September 1, 2023, we entered into an Exclusive Negotiation Agreement (the Negotiation Agreement) with Fuji Pharma Co., Ltd. (Fuji Pharma), a Tokyo Stock Exchange-listed, Japan-based pharmaceutical company with a significant research, development, and commercial focus on pharmacological therapies for women’s health conditions. Pursuant to the terms and conditions of the Negotiation Agreement, we agreed, for a limited period of time, to negotiate exclusively with Fuji Pharma for a potential exclusive license agreement to develop and commercialize PH80 (now known as refisolone) in Japan. PH80, our clinical-stage pherine product candidate focused primarily on the treatment of vasomotor symptoms (hot flashes) associated with menopause (the Potential Definitive Agreement). The Negotiation Agreement provides for an exclusive negotiation period beginning on the date of formal written notice being received by Fuji Pharma that we have selected a contract development and manufacturing organization to conduct preclinical toxicology studies for PH80 (the Payment Event), and terminating on the later to occur of (i) fourteen (14) months from the date of the Payment Event or (ii) ninety (90) days from the date that the U.S. Food and Drug Administration accepts our PH80 U.S. Investigational New

Drug (IND) application for clinical development of PH80 in the U.S. for the treatment of vasomotor symptoms (hot flashes) due to menopause (the Exclusive Negotiation Period).

As consideration for the Exclusive Negotiation Period, Fuji Pharma agreed to make a payment to us of $1.5 million (the Purchase Price), payable upon occurrence of the Payment Event. The Payment Event occurred in October 2023, and we received payment of the Purchase Price in full in November 2023. The Purchase Price is non-refundable, except upon a material breach of the Negotiation Agreement by the Company; however, should the Company and Fuji Pharma enter into the Potential Definitive Agreement, the Purchase Price will be creditable against any upfront fee due in connection with the execution of such Potential Definitive Agreement. Neither the Company nor Fuji Pharma is obligated to enter into the Potential Definitive Agreement, and if the Company and Fuji Pharma have not entered into the Potential Definitive Agreement on or before the end of the Exclusive Negotiation Period, either the Company or Fuji Pharma may terminate any further negotiations.

As of March 31, 2026, the entire amount remaining unrecognized under the Negotiation Agreement of $1.3 million was classified as deferred revenue, current portion, on the consolidated balance sheets. During the years ended March 31, 2026 and 2025, we recognized no revenue under the Negotiation Agreement. The remaining deferred revenue under the Negotiation Agreement will be recognized upon expiration of the Exclusive Negotiation Period, which is currently expected in June 2026, or accounted for as a creditable prepayment under ASC 606, should an exclusive license agreement be reached with Fuji Pharma prior to the date of expiration.

Basis of Presentation, Principles of Consolidation and Summary of Significant Accounting Policies (Tables)

12 Months Ended

Mar. 31, 2026

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share


	As of March 31,
	2026	2025
Outstanding options under the Company's Amended and Restated 2016 (formerly 2008) Stock Incentive Plan and 2019 Omnibus Equity Incentive Plan	4,457,368	3,239,642
Outstanding warrants to purchase common stock	20,559,108	20,571,460
Total	25,016,476	23,811,102

Consolidated Statements of Operations and Comprehensive Loss - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2026	Mar. 31, 2025
Revenues:
Total revenues	$ 1,269	$ 486
Revenue from Contract with Customer, Product and Service [Extensible Enumeration]	Sublicense and Other Revenue [Member]	Sublicense and Other Revenue [Member]
Operating expenses:
Research and development	$ 54,974	$ 39,375
General and administrative	18,421	17,084
Total operating expenses	73,395	56,459
Loss from operations	(72,126)	(55,973)
Other income, net:
Interest income, net	2,441	4,557
Other income, net	7	5
Loss before income taxes	(69,678)	(51,411)
Income taxes	(7)	(7)
Net loss	(69,685)	(51,418)
Unrealized gain (loss) on marketable securities	(7)	5
Comprehensive loss	$ (69,692)	$ (51,413)
Loss per share, basic (in dollars per share)	$ (1.83)	$ (1.67)
Loss per share, diluted (in dollars per share)	$ (1.83)	$ (1.67)
Weighted average common shares outstanding, basic (in shares)	38,073,926	30,877,029
Weighted average common shares outstanding, diluted (in shares)	38,073,926	30,877,029

Stock-Based Compensation (Tables)

12 Months Ended

Mar. 31, 2026

Share-Based Payment Arrangement [Abstract]

Schedule of Stock Option Activity

A summary of our stock option activity for the year ended March 31, 2026 is as follows (in thousands, except share and per share data and years):


	Options	Weighted-Average Exercise Price		Weighted-Average Remaining Contractual Term (Years)	Aggregate Intrinsic Value
Outstanding at March 31, 2025	3,239,642	$	10.32	8.4	$	—
Granted	1,831,827	$	2.31
Exercised	(2,330)	$	3.32
Forfeited	(482,103)	$	2.81
Expired	(129,668)	$	12.26
Outstanding at March 31, 2026	4,457,368	$	7.78	7.8	$	—
Exercisable at March 31, 2026	2,419,193	$	12.96	6.8	$	—
Vested and expected to vest as of March 31, 2026	4,457,368	$	7.78	7.8	$	—

Schedule of Fair Value of Stock Options Assumptions

The fair value of stock options granted was estimated using the following assumptions:


	Year Ended March 31,
	2026	2025
Risk-free interest rate	3.6 % - 4.2 %	3.5 % - 4.5 %
Expected term (years)	5.27 - 6.08	5.07 - 6.14
Expected stock price volatility	155.1% - 164.3%	163.4% - 176.2%
Dividend yield	—	—

Schedule of Stock-Based Compensation Expense Recognized

Stock-based compensation expense recognized for all equity awards has been included in the consolidated statements of operations and comprehensive loss as follows (in thousands):


	Year Ended March 31,
	2026		2025

Research and development expense	$	1,732	$	1,938
General and administrative expense	2,265		2,377
Total stock-based compensation expense	$	3,997	$	4,315

Income Taxes - Narrative (Details) - USD ($) $ in Thousands	12 Months Ended
Income Taxes - Narrative (Details) - USD ($) $ in Thousands	Mar. 31, 2026	Mar. 31, 2025	Mar. 31, 2024
Tax Credit Carryforward [Line Items]
Loss before income taxes	$ (69,678)	$ (51,411)
Current state income tax expense	7	7
Increase in valuation allowance	$ 15,700	17,200
Deferred tax assets, taxable income limitation	80.00%
Unrecognized tax benefits	$ 2,577	2,399	$ 4,931
Unrecognized tax benefits that would impact effective tax rate	0	0
Interest or penalties related to unrecognized tax benefits	0	0
Research and development
Tax Credit Carryforward [Line Items]
Unrecognized tax benefits	2,600	$ 2,400
U.S. federal
Tax Credit Carryforward [Line Items]
Operating loss carryforwards	314,300
Operating loss carryforwards, subject to expiration	80,600
Operating loss carryforwards, not subject to expiration	233,700
U.S. federal \| Research and development
Tax Credit Carryforward [Line Items]
Tax credit carryforward	8,600
State
Tax Credit Carryforward [Line Items]
Operating loss carryforwards, subject to expiration	63,700
Operating loss carryforwards, not subject to expiration	10,800
State \| Research and development
Tax Credit Carryforward [Line Items]
Tax credit carryforward	$ 2,200

Segment Information	12 Months Ended
Segment Information	Mar. 31, 2026
Segment Reporting [Abstract]
Segment Information	Segment Information We operate as one operating segment, which includes all activities related to the discovery and development of our clinical and preclinical product candidates, for the purposes of assessing performance, making operating decisions, and allocating our resources. Our chief operating decision maker (CODM) is our President and Chief Executive Officer. The CODM regularly reviews total operating expenses, disaggregated into research and development expense and general and administrative expense, against budget and prior periods. The CODM also monitors cash, cash equivalents, and marketable securities and internal cash forecasts to assess the sufficiency of cash resources to support our research and development activities. The categories of significant expenses regularly provided to the CODM are reflected in our consolidated statements of operations and comprehensive loss. The measure of segment assets is reported on our consolidated balance sheets as total consolidated assets, and segment loss is reflected as net loss in our consolidated statements of operations and comprehensive loss.

- Definition

The entire disclosure for segment reporting.

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+ Details