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ORGANIZATION, LIQUIDITY AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES | 12 Months Ended
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Mar. 31, 2024
Accounting Policies [Abstract] |
ORGANIZATION, LIQUIDITY AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES | 1. ORGANIZATION, LIQUIDITY AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES ORGANIZATION Aethlon Medical, Inc., or Aethlon, the Company, we or us, is a medical therapeutic company focused on developing the Hemopurifier, a clinical-stage immunotherapeutic device designed to combat cancer and life-threatening viral infections and for use in organ transplantation. In human studies, 164 sessions with 38 patients, the Hemopurifier was safely utilized and demonstrated the potential to remove life-threatening viruses. In pre-clinical studies, the Hemopurifier has demonstrated the potential to remove harmful exosomes and exosomal particles from biological fluids, utilizing its proprietary lectin-based technology. This action has potential applications in cancer, where exosomes and exosomal particles may promote immune suppression and metastasis, and in life-threatening infectious diseases. The U.S. Food and Drug Administration, or FDA, has designated the Hemopurifier as a “Breakthrough Device” for two independent indications:
| · | the treatment of individuals with advanced or metastatic cancer who are either unresponsive to or intolerant of standard of care therapy, and with cancer types in which exosomes have been shown to participate in the development or severity of the disease; and
| · | the treatment of life-threatening viruses that are not addressed with approved therapies.
Oncology We believe the Hemopurifier may be a substantial advancement in the treatment of patients with advanced and metastatic cancer through its design to bind to and remove harmful exosomes and exosomal particles that promote the growth and spread of tumors. In October 2022, we formed a wholly-owned subsidiary in Australia to initially conduct oncology-related clinical research, then seek regulatory approval and commercialize our Hemopurifier in Australia. We are currently working with our contract research organization, or CRO, on preparations to conduct a clinical trial in Australia in patients with solid tumors, including head and neck cancer, and gastrointestinal cancers. In January 2023, we entered into an agreement with North American Science Associates, LLC, or NAMSA, a world leading medical technology CRO offering global end-to-end development services, to oversee our planned clinical trials investigating the Hemopurifier for oncology indications. Pursuant to the agreement, NAMSA agreed to manage our planned clinical trials of the Hemopurifier for patients in the United States and Australia with various types of cancer tumors. We recently completed an in vitro binding study of relevant oncology targets, to provide pre-clinical evidence to support our trial design and translational endpoints. Our study indicated positive results from this study, providing evidence that our Hemopurifier removes extracellular vesicles, or EVs, from plasma. This translational study provides pre-clinical evidence to support our planned phase 1 safety, feasibility and dose-finding clinical trials of our Hemopurifier in patients with solid tumors who have stable or progressive disease during anti-PD-1 monotherapy treatment, such as Keytruda® or Opdivo®. In addition to an interested initial trial site in India, we had three interested sites in Australia that were awaiting our completion of this in vitro binding study. We added the data from this study to our Clinical Investigator Brochure and submitted that brochure to the Ethics Committee of Royal Adelaide Hospital in Australia and in June 2024, we received approval for our proposed phase 1 oncology trial from the Ethics Committee from Royal Adelaide Hospital. We are currently in the process of applying to the Ethics Committees of the two additional interested clinical trial sites in Australia and the site in India. Life-Threatening Viral Infections We also believe that the Hemopurifier can be part of the broad-spectrum treatment of life-threatening highly glycosylated, or carbohydrate coated, viruses that are not addressed with an already approved treatment. In small-scale or early feasibility human studies, the Hemopurifier has been used in the past to treat individuals infected with human immunodeficiency virus, or HIV, hepatitis-C and Ebola. Additionally, in vitro, the Hemopurifier has been demonstrated to capture Zika virus, Lassa virus, MERS-CoV, cytomegalovirus, Epstein-Barr virus, Herpes simplex virus, Chikungunya virus, Dengue virus, West Nile virus, smallpox-related viruses, H1N1 swine flu virus, H5N1 bird flu virus, Monkeypox virus and the reconstructed Spanish flu virus of 1918. In several cases, these studies were conducted in collaboration with leading government or non-government research institutes. We believe the Hemopurifier can be part of the treatment of severe SARS-CoV-2 viremia/COVID-19, or COVID-19, cases. COVID viremia is detected in approximately 34% of patients and is associated with severity, requirement for intensive care unit, or ICU, stay, development of multi-organ failure and poor outcomes. EVs and exosomal miRNAs may play a role in the spread of infection as well as ongoing inflammation, development of coagulopathy and lung injury. Our proprietary Galanthus nivalis agglutinin, or GNA, affinity resin has been shown to bind multiple clinically relevant SARS-CoV-2 variants. Furthermore, studies have demonstrated in vitro removal of seven SARS-CoV2 variants (104 PFU/mL) in phosphate buffered saline passed over a column of GNA affinity resin (1g) three times, with capture efficiencies between 53% and 89%. On June 17, 2020, the FDA approved a supplement to our open Investigational Device Exemption, or IDE, for the Hemopurifier in viral disease to allow for the testing of the Hemopurifier in patients with SARS-CoV-2/COVID-19, or COVID-19, in a new feasibility study. That study was designed to enroll up to 40 subjects at up to 20 centers in the United States. Subjects were to have established laboratory diagnosis of COVID-19, be admitted to an intensive care unit, or ICU, and have acute lung injury and/or severe or life-threatening disease, among other criteria. Endpoints for this study, in addition to safety, included reduction in circulating virus as well as clinical outcomes (NCT # 04595903). In January 2021, the Hemopurifier was used to treat a viremic patient, under our emergency use approval, with a predicted risk of mortality of 80% and the Hemopurifier was able to reduce the patient’s SARS-CoV-2 plasma viral load by 58.4%. In June 2022, the first patient in this study was enrolled and completed the Hemopurifier treatment phase of the protocol. Due to the lack of COVID-19 patients in the ICUs of our trial sites, we terminated this study in 2022. However, our IDE for this indication remains open, as we have an active COVID-19 trial in India and wish to preserve the option of enrolling patients if the situation with COVID-19 changes. Under Single Patient Emergency Use regulations, Aethlon has treated two patients with COVID-19 with the Hemopurifier, in addition to the COVID-19 patient treated with our Hemopurifier in our COVID-19 clinical trial discussed above. We previously reported a disruption in our Hemopurifier supply, as our then existing supply of Hemopurifiers expired on September 30, 2022 and, also as previously disclosed, we are dependent on FDA approval of qualified suppliers to manufacture our Hemopurifier. We recently completed final testing in order to begin manufacturing Hemopurifiers at our new manufacturing facility in San Diego, California for use in planned U.S. clinical trials, using GNA from our current supplier. In April 2024, we received a notice of approval from the FDA for our IDE supplement to add our San Diego manufacturing facility and we now are able to manufacture Hemopurifiers at this site. We also have sufficient Hemopurifiers on hand for use in our planned Australia and India oncology trials. Our intended transition to a new supplier for GNA, a component of our Hemopurifier, continues to be delayed as we work with the FDA for approval of our supplement to our IDE, which is required to make this manufacturing supplier change. We are working with the FDA to qualify this second supplier of our GNA. We also obtained ethics review board, or ERB, approval from and entered into a clinical trial agreement with Medanta Medicity Hospital, a multi-specialty hospital in Delhi NCR, India, for a COVID-19 clinical trial at that location. In May 2023, we received ERB approval from the MAMC, for a second site for our clinical trial in India to treat severe COVID-19. MAMC was established in 1958 and is located in New Delhi, India. MAMC is affiliated with the University of Delhi and is operated by the Delhi government. We now have two sites in India for this trial with the Medanta Medicity Hospital and Maulana Azad Medical College, or MAMC. One patient has been treated to date; however, we have been informed by our CRO that a new COVID-19 subvariant was detected in India recently. Our COVID-19 trial in India remains open in the event that there are COVID-19 admissions to the ICUs at our sites in India. Organ Transplantation Additionally, based on preclinical data with acellular kidney perfusates, we believe that the Hemopurifier has potential applications in organ transplantation. We are investigating whether the Hemopurifier, when incorporated into a machine perfusion organ preservation circuit, can remove harmful viruses, exosomes, RNA molecules, cytokines, chemokines and other inflammatory molecules from recovered organs. We initially are focused on recovered kidneys from deceased donors. We have previously demonstrated the removal of multiple viruses and exosomes and exosomal particles from buffer solutions, in vitro, utilizing a scaled-down version of our Hemopurifier and believe this process could reduce transplantation complications by improving graft function, reducing graft rejection, maintaining or improving organ viability prior to transplantation, and potentially reducing the number of kidneys rejected for transplant. Successful outcomes of human trials will also be required by the regulatory agencies of certain foreign countries where we plan to market and sell the Hemopurifier. Some of our patents may expire before FDA approval or approval in a foreign country, if any, is obtained. However, we believe that certain patent applications and/or other patents issued to us more recently will help protect the proprietary nature of our Hemopurifier treatment technology. In addition to the foregoing, we are monitoring closely the impact of inflation, recent bank failures and the war between Russia and Ukraine and the military conflicts in Israel and the surrounding areas, as well as related political and economic responses and counter-responses by various global factors on our business. Given the level of uncertainty regarding the duration and impact of these events on capital markets and the U.S. economy, we are unable to assess the impact on our timelines and future access to capital. The full extent to which inflation, recent bank failures and the ongoing military conflicts will impact our business, results of operations, financial condition, clinical trials and preclinical research will depend on future developments, as well as the economic impact on national and international markets that are highly uncertain. Our executive offices are located at 11555 Sorrento Valley Road, Suite 203, San Diego, California 92121. Our telephone number is (619) 941-0360. Our website address is www.aethlonmedical.com. The information contained on, or that can be accessed through, our website is not part of, and is not incorporated into, this Annual Report on Form 10-K. . Our common stock is listed on the Nasdaq Capital Market under the symbol “AEMD.” LIQUIDITY AND GOING CONCERN The Company has incurred losses since inception in devoting substantially all of its efforts toward research and development and has an accumulated deficit of $154,566,728 as of March 31, 2024. During the year ended March 31, 2024, the Company generated a net loss of approximately $12,208,000 and the Company expects that it will continue to generate operating losses for the foreseeable future. While the Company currently has over $9.1 million in cash and cash equivalents and have been carrying out certain expense reductions since November 2023; our planned additional expense reductions may not materialize and/or our patient recruitment may occur more rapidly than expected along with the concomitant increases in expenses, therefore there is substantial doubt that our cash on hand will carry the company for 12 months beyond the filing date of the financial statements included in this Annual Report. The Company’s ability to execute its current operating plan depends on its ability to reduce expenses and obtain additional funding via the sale of equity, or other sources of capital. The Company plans to continue actively pursuing financing alternatives, however, there can be no assurance that it will obtain the necessary funding, raising substantial doubt about the Company’s ability to continue as a going concern within one year of the date these financial statements are issued. The accompanying financial statements do not include any adjustments that might result from the outcome of this uncertainty. PRINCIPLES OF CONSOLIDATION The accompanying consolidated financial statements include the accounts of Aethlon Medical, Inc. and its wholly owned subsidiary, Aethlon Medical Australia Pty Ltd, as well as its previously majority-owned subsidiary, ESI, which dissolved in September 2022. Operations in our Australian subsidiary is recorded in their functional currency. The results of operations for our Australian subsidiary are translated from functional currency into U.S. dollars using the current exchange rate on the date the expense was recognized. Assets and liabilities are translated using the period end exchange rates. The U.S dollar effects that arise from translating the net assets of are recorded in other comprehensive income (loss). All significant inter-company transactions and balances have been eliminated in consolidation. The consolidated financial statements contain all normal recurring accruals and adjustments that, in the opinion of management, are necessary to present fairly the consolidated financial statements as of and for the fiscal years ended March 31, 2024 and 2023, and the consolidated statement of cash flows for the fiscal years ended March 31, 2024 and 2023. RISKS AND UNCERTAINTIES We operate in an industry that is subject to intense competition, government regulation and rapid technological change. Our operations are subject to significant risk and uncertainties including financial, operational, technological, regulatory, and including the potential risk of business failure. USE OF ESTIMATES We prepare our consolidated financial statements in conformity with accounting principles generally accepted in the United States of America, or GAAP, which requires us to make a number of estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements. Such estimates and assumptions affect the reported amounts of expenses during the reporting period. On an ongoing basis, we evaluate estimates and assumptions based upon historical experience and various other factors and circumstances. We believe our estimates and assumptions are reasonable in the circumstances; however, actual results may differ from these estimates under different future conditions. We believe that the estimates and assumptions that are most important to the portrayal of our financial condition and results of operations, in that they require the most difficult, subjective or complex judgments, form the basis for the accounting policies deemed to be most critical to us. CASH AND CASH EQUIVALENTS Accounting standards define “cash and cash equivalents” as any short-term, highly liquid investment that is both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. For the purpose of financial statement presentation, we consider all highly liquid investment instruments with original maturities of three months or less when purchased, or any investment redeemable without penalty or loss of interest to be cash equivalents. Cash is carried at cost, which approximates fair value, and cash equivalents are carried at fair value. For the fiscal years ended March 31, 2024 and March 31, 2023 our cash and cash equivalents were comprised of the following instruments:
Schedule of cash and cash equivalents |  |  |  |  |  |  |  |
|  | For the year ended |
|  | March 31, 2024 |  |  | March 31, 2023 |
Cash in US bank checking account |  | $ | 697,908 |  |  | $ | 575,766 |
Cash equivalents held in US Treasury bills |  |  | 4,736,469 |  |  |  | 13,910,973 |
Cash in Australian bank checking account |  |  | 7,601 |  |  |  | 46,204 |
Total cash and cash equivalents |  | $ | 5,441,978 |  |  | $ | 14,532,943 |
CONCENTRATIONS OF CREDIT RISKS Cash is maintained at one US financial institution in a checking account. Accounts at this institution are secured by the Federal Deposit Insurance Corporation up to $250,000. Our March 31, 2024 cash balances were approximately $568,000 over such insured amount. We do not believe that the Company is exposed to any significant risk with respect to its cash in that checking account. At March 31, 2024, we maintained cash equivalents of approximately $4.7 million in US Treasury bills with maturities of less than three months. We do not believe that the Company is exposed to any significant risk with respect to its cash equivalents since they represent US government risk. Cash is maintained at one Australian financial institution in checking accounts. Accounts at this institution are secured by the Financial Claims Scheme for up to Australian $250,000. Our March 31, 2024 Australian cash balance was below that threshold. We did not have any revenue in fiscal year ended March 31, 2024. All of our revenue in the fiscal year ended March 31, 2023 related to our government contracts. We did not have any accounts receivable at March 31, 2024. RESTRICTED CASH To comply with the terms of our laboratory, office, and manufacturing space leases, we caused our bank to issue two standby letters of credit, or the L/Cs, in the amount of $87,506 in favor of the landlord. The L/Cs are in lieu of a security deposit. In order to support the L/Cs, we agreed to have our bank withdraw $87,506 from our operating accounts and to place that amount in restricted certificates of deposit. We have classified that amount as restricted cash, a long-term asset, on our balance sheet. PROPERTY AND EQUIPMENT Property and equipment are stated at cost. Depreciation is computed using the straight-line method over the estimated useful lives of the related assets, which range from two to five years. Repairs and maintenance are charged to expense as incurred while improvements are capitalized. Upon the sale or retirement of property and equipment, the accounts are relieved of the cost and the related accumulated depreciation with any gain or loss included in the consolidated statements of operations. INCOME TAXES Deferred tax assets and liabilities are recognized for the future tax consequences attributable to the difference between the consolidated financial statements and their respective tax basis. Deferred income taxes reflect the net tax effects of (a) temporary differences between the carrying amounts of assets and liabilities for financial reporting purposes and the amounts reported for income tax purposes, and (b) tax credit carryforwards. We record a valuation allowance for deferred tax assets when, based on our best estimate of taxable income (if any) in the foreseeable future, it is more likely than not that some portion of the deferred tax assets may not be realized. Management has provided a full valuation allowance against the Company’s net deferred tax asset. Tax positions taken or expected to be taken in the course of preparing tax returns are required to be evaluated to determine whether the tax positions are more-likely-than-not to be sustained by the applicable tax authority. Tax positions deemed to not meet a more-likely-than-not threshold would be recorded as tax expense in the current year. There were no uncertain tax positions that require accrual to or disclosure in the consolidated financial statements as of March 31, 2024 and 2023. LONG-LIVED ASSETS Long-lived assets are reviewed for impairment whenever events or changes in circumstances indicate that their carrying amounts may not be recoverable. If the cost basis of a long-lived asset is greater than the projected future undiscounted net cash flows from such asset, an impairment loss is recognized. We believe no impairment charges were necessary during the fiscal years ended March 31, 2024 and 2023. LOSS PER SHARE Basic loss per share is computed by dividing net loss available to common stockholders by the weighted average number of common shares outstanding during the period of computation. Diluted loss per share is computed similar to basic loss per share except that the denominator is increased to include the number of additional common shares that would have been outstanding if potential common shares had been issued, if such additional common shares were dilutive. Since we had net losses for all periods presented, basic and diluted loss per share are the same, and additional potential common shares have been excluded as their effect would be antidilutive. As of March 31, 2024 and 2023, a total of 124,028 and 204,501 potential common shares, consisting of shares underlying outstanding stock options, restricted stock units, or RSUs, and warrants were excluded as their inclusion would be antidilutive. DEFERRED OFFERING COSTS Specific incremental costs directly attributable to an actual offering of securities may be deferred and charged against the gross proceeds of the offering. As of March 31, 2024, approximately $278,000 of costs have been deferred. REVENUE RECOGNITION We did not recognize revenue in fiscal year ended March 31, 2024. Our revenues in the fiscal year ended March 31, 2023 consisted entirely of amounts earned under contracts and grants with the National Institutes of Health, or NIH. During the fiscal year ended March 31, 2023, we recognized revenues totaling $574,245 under such contracts. We have concluded that these agreements are not within the scope of ASC Topic, 606, Revenue from Contracts with Customers, or Topic 606, as the NIH grants and contracts do not meet the definition of a “customer” as defined by Topic 606. Prior to the effective date of ASC Topic 606, which for the Company was April 1, 2018, we accounted for our grant/contract revenues under the Milestone Method as prescribed by the legacy guidance of ASC 605-28, Revenue Recognition – Milestone Method, or Milestone Method. In the absence of other applicable guidance under US GAAP, effective April 1, 2018, we elected to continue to use the Milestone Method by analogy to recognize revenue under these grants/contracts. We identify the deliverables included within these agreements and evaluate which deliverables represent separate units of accounting based on if certain criteria are met, including whether the delivered element has standalone value to the collaborator. The consideration received is allocated among the separate units of accounting, and the applicable revenue recognition criteria are applied to each of the separate units. A milestone is an event having all of the following characteristics: (1) There is substantive uncertainty at the date the arrangement is entered into that the event will be achieved. A vendor’s assessment that it expects to achieve a milestone does not necessarily mean that there is not substantive uncertainty associated with achieving the milestone. (2) The event can only be achieved based in whole or in part on either: (a) the vendor’s performance; or (b) a specific outcome resulting from the vendor’s performance. (3) If achieved, the event would result in additional payments being due to the vendor. A milestone does not include events for which the occurrence is either: (a) contingent solely upon the passage of time; or (b) the result of a counterparty’s performance. The policy for recognizing deliverable consideration contingent upon achievement of a milestone must be applied consistently to similar deliverables. The assessment of whether a milestone is substantive is performed at the inception of the arrangement. The consideration earned from the achievement of a milestone must meet all of the following for the milestone to be considered substantive: (1) The consideration is commensurate with either: (a) the vendor’s performance to achieve the milestone; or (b) the enhancement of the value of the delivered item or items as a result of a specific outcome resulting from the vendor’s performance to achieve the milestone; (2) The consideration relates solely to past performance; and (3) The consideration is reasonable relative to all of the deliverables and payment terms (including other potential milestone consideration) within the arrangement. A milestone is not considered substantive if any portion of the associated milestone consideration relates to the remaining deliverables in the unit of accounting (i.e., it does not relate solely to past performance). To recognize the milestone consideration in its entirety as revenue in the period in which the milestone is achieved, the milestone must be substantive in its entirety. Milestone consideration cannot be bifurcated into substantive and nonsubstantive components. In addition, if a portion of the consideration earned from achieving a milestone may be refunded or adjusted based on future performance, the related milestone is not considered substantive. We have recognized revenue under the following contract/grant: Phase 2 Melanoma Cancer Contract On September 12, 2019, the National Cancer Institute, or NCI, part of the NIH, awarded to us a SBIR Phase II Award Contract, for NIH/NCI Topic 359, entitled “A Device Prototype for Isolation of Melanoma Exosomes for Diagnostics and Treatment Monitoring”, or the Award Contract. The Award Contract amount was $1,860,561 and, as amended, ran for the period from September 16, 2019 through September 15, 2022. The work performed pursuant to this Award Contract was focused on melanoma exosomes. This work followed from our completion of a Phase I contract for the Topic 359 solicitation that ran from September 2017 through June 2018, as described below. Following on the Phase I work, the deliverables in the Phase II program involved the design and testing of a pre-commercial prototype of a more advanced version of the exosome isolation platform. The Award Contract ended on September 15, 2022 and we presented the required final report to the NCI. As the NCI completed its close out review of the contract, we recognized as revenue $574,245 in fiscal year ended March 31, 2023. STOCK-BASED COMPENSATION Employee stock options and rights to purchase shares under stock participation plans are accounted for under the fair value method. Accordingly, share-based compensation is measured when all granting activities have been completed, generally the grant date, based on the fair value of the award. The exercise price of options is generally equal to the market price of the Company’s common stock (defined as the closing price as quoted on the Nasdaq Capital Market or OTCBB on the date of grant). Compensation cost recognized by the Company includes (a) compensation cost for all equity incentive awards granted prior to April 1, 2006, but not yet vested, based on the grant-date fair value estimated in accordance with the original provisions of the then current accounting standards, and (b) compensation cost for all equity incentive awards granted subsequent to March 31, 2006, based on the grant-date fair value estimated in accordance with the provisions of subsequent accounting standards. We use a Binomial Lattice option pricing model for estimating fair value of options granted (see Note 4). The following table summarizes share-based compensation expenses relating to shares and options granted and the effect on loss per common share during the years ended March 31, 2024 and 2023:
Schedule of share-based compensation expenses |  |  |  |  |  |
|  | Fiscal Years Ended |
|  | March 31, 2024 |  |  | March 31, 2023 |
Vesting of Stock Options and Restricted Stock Units |  | $ | 1,219,370 |  |  | $ | 1,051,898 |
Total Stock-Based Compensation Expense |  | $ | 1,219,370 |  |  | $ | 1,051,898 |
Weighted average number of common shares outstanding – basic and diluted |  |  | 2,512,774 |  |  |  | 2,053,744 |
Basic and diluted loss per common share |  | $ | (0.49 | ) |  | $ | (0.51 | )
We record share-based compensation expenses for awards of stock options and RSUs under ASC 718, Share-based compensation, or ASC 718. For awards to non-employees for periods prior to the adoption of ASU 2018-07, Compensation-Stock Compensation: Improvements to Non-employee Share-Based Payment Accounting, on April 1, 2019, the Company had applied ASC 505-50, Equity – Equity-based payments to non-employees, or ASC 505-50. ASC 718 establishes guidance for the recognition of expenses arising from the issuance of share-based compensation awards at their fair value at the grant date. We recognize share-based compensation expense related to stock options and stock appreciation rights granted to employees, directors and consultants based on the estimated fair value of the awards on the date of grant. We estimate the grant date fair value, and the resulting share-based compensation expense, for stock options that only have service vesting requirements or performance-based vesting requirements without market conditions using the binomial lattice option-pricing model. The grant date fair value of the share-based awards with service vesting requirements is generally recognized on a straight-line basis over the requisite service period, which is generally the vesting period of the respective awards. Determining the appropriate amount to expense for performance-based awards based on the achievement of stated goals requires judgment. The estimate of expense is revised periodically based on the probability of achieving the required performance targets and adjustments are made as appropriate. The cumulative impact of any revisions is reflected in the period of change. If any applicable financial performance goals are not met, no compensation cost is recognized and any previously recognized compensation cost is reversed. For performance-based awards with market conditions, we determine the fair value of awards as of the grant date using a Monte Carlo simulation model. We review share-based compensation on a quarterly basis for changes to the estimate of expected award forfeitures based on actual forfeiture experience. The effect of adjusting the forfeiture rate for all expense amortization after March 31, 2007 is recognized in the period the forfeiture estimate is changed. The effect of forfeiture adjustments for the fiscal year ended March 31, 2024 was insignificant. PATENTS Patents include both foreign and domestic patents. We capitalize the cost of patents, some of which were acquired, and amortize such costs over the shorter of the remaining legal life or their estimated economic life, upon issuance of the patent. The unamortized costs of patents are subject to our review for impairment under our long-lived asset policy above. STOCK PURCHASE WARRANTS In the past we issued warrants for the purchase of shares of our common stock in connection with the issuance of common stock for cash. Warrants issued in connection with common stock for cash, if classified as equity, are considered issued in connection with equity transactions and the warrant fair value is recorded to additional paid-in-capital. RESEARCH AND DEVELOPMENT EXPENSES Our research and development costs are expensed as incurred. We incurred approximately $2,520,000 and $2,745,000 of research and development expenses for the years ended March 31, 2024 and 2023, respectively, which are included in various operating expenses in the accompanying consolidated statements of operations. OFF-BALANCE SHEET ARRANGEMENTS We have not entered into any off-balance sheet arrangements that have or are reasonably likely to have a current or future material effect on our consolidated financial statements. SIGNIFICANT RECENT ACCOUNTING PRONOUNCEMENTS In December 2023, the FASB issued Accounting Standards Update 2023-09, Improvements to Income Tax Disclosures (“ASU 2023-09”), which requires enhanced annual disclosures for specific categories in the rate reconciliation and income taxes paid disaggregated by federal, state and foreign taxes. ASU 2023-09 is effective for public business entities for annual periods beginning after December 15, 2024. The Company is evaluating if the adoption of this new standard will have a material effect on our disclosures. In June 2016, the FASB issued ASU No. 2016-13, Financial Instruments-Credit Losses (Topic 326), Measurement of Credit Losses on Financial Instruments. The adoption of ASU No. 2016-13 for smaller reporting companies that did not previously early adopt was January 1, 2023. The Company maintained US Treasury bills with maturities of less than three months and expects zero credit losses from these securities. As a result, the Company did not record an allowance for expected credit losses.

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