Note 1 — Company Overview

Eton is an innovative pharmaceutical company focused on developing and commercializing treatments for rare diseases. The Company currently has five commercial rare disease products: ALKINDI SPRINKLE® for the treatment of pediatric adrenocortical insufficiency; Carglumic Acid for the treatment of hyperammonemia due to N-acetylglutamate synthase (NAGS) deficiency; Betaine Anhydrous for the treatment of homocystinuria; Nitisinone for the treatment of hereditary tyrosinemia type 1 (HT-1); and PKU GOLIKE® medical formula for patients with phenylketonuria (“PKU”). The Company has three additional product candidates in late-stage development: ET-400, ET-600, and ZENEO® hydrocortisone autoinjector.

Note 2 — Liquidity Considerations

The Company believes its existing cash and cash equivalents of $20,261 as of September 30, 2024 in addition to revenues from products will be sufficient to fund its operating expenses and capital expenditure requirements for at least the next twelve months from the date of filing of this quarterly report. This estimate is based on the Company’s current assumptions, including assumptions relating to estimated sales and its ability to manage spending. The Company could use its available capital resources sooner than currently expected. Accordingly, the Company could seek to obtain additional capital through equity financings, the issuance of debt or other arrangements. However, the Company cannot make assurances that it will be able to raise additional capital if needed or under acceptable terms. The sale of additional equity may dilute existing stockholders, and newly issued stock could contain senior rights and preferences compared to currently outstanding common shares. The Company’s existing debt obligation contains covenants and limits the Company’s ability to pay dividends or make other distributions to stockholders. If the Company experiences delays in product development or sales growth, obtaining regulatory approval for its other product candidates, or is unable to secure such additional financing, it might need to scale back operations.

Note 3 — Summary of Significant Accounting Policies

Basis of Presentation

The Company has prepared the accompanying condensed financial statements in accordance with accounting principles generally accepted in the United States (“GAAP”).

Unaudited Interim Financial Information

The accompanying interim condensed financial statements are unaudited and have been prepared on the same basis as the audited financial statements and, in the opinion of management, reflect all adjustments necessary for the fair presentation of the Company’s financial position as of September 30, 2024, and the results of its operations and its cash flows for the periods ended September 30, 2024 and 2023. The financial data and other information disclosed in these notes related to the three-month and nine-month periods ended September 30, 2024 and 2023 are also unaudited. The results for the three-month and nine-month periods ended September 30, 2024 are not necessarily indicative of results to be expected for the year ending December 31, 2024, any other interim periods, or any future year or period.

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 revenue and expenses during the reporting periods. Significant estimates and assumptions reflected in these financial statements include, but are not limited to, provisions for uncollectible receivables, chargebacks and sales returns, Medicaid program rebates, valuation of inventories, useful lives of assets and the recoverability of long-lived assets, valuation of deferred tax assets, the accrual of research and development expenses and milestones, and the valuation of stock options, warrants, and restricted stock units (“RSUs”). Estimates are periodically reviewed in light of changes in circumstances, facts, and experience. Changes in estimates are recorded in the period in which they become known. Actual results could differ from those estimates or assumptions.

Segment Information

The Company operates the business on the basis of a single reportable segment, which is the business of developing and commercializing prescription drug products. The Company’s chief operating decision-maker is the Chief Executive Officer (“CEO”), who evaluates the Company as a single operating segment.

Cash and Cash Equivalents

The Company considers all highly liquid investments with an original maturity of three months or less to be cash equivalents. All cash and cash equivalents are held in U.S. financial institutions or invested in short-term U.S. treasury bills or high-grade money market funds. As of September 30, 2024, the Company’s cash is in a non-interest-bearing account and a government money market fund. From time to time, amounts deposited with its bank exceed federally insured limits. The Company believes the associated credit risk to be minimal.

Accounts Receivable

Accounts receivable are recorded at the invoiced amount and are non-interest bearing. Accounts receivable are recorded net of allowances for credit losses, cash discounts for prompt payment, distribution fees, chargebacks, rebates, and returns. The total for these reserves amounted to $229 and $129 as of September 30, 2024 and December 31, 2023, respectively. The Company considers historical collection rates and the current financial status of its customers, as well as information from internal and external sources, macroeconomic and industry-specific factors, current conditions, and reasonable and supportable forecasts when evaluating potential credit losses. Historically, the Company's accounts receivable balances have been highly concentrated with a select number of customers, consisting primarily of specialty pharmacies and large wholesale pharmaceutical distributors. Given the size and creditworthiness of these customers, we have not experienced and do not expect to experience material credit losses.

Inventories

The Company values its inventories at the lower of cost or net realizable value using the first-in, first-out method of valuation. The Company reviews its inventories for potential excess or obsolete issues on an ongoing basis and will record a write-down if an impairment is identified. Inventories at September 30, 2024 and December 31, 2023, consist solely of purchased finished goods. At September 30, 2024 and December 31, 2023, inventories are shown net of reserves for ALKINDI SPRINKLE® of $72 and $76, respectively, due to the risk of expiry before this entire stock of inventories is sold.

Property and Equipment

Property and equipment are stated at cost less accumulated depreciation. Depreciation of property and equipment is computed utilizing the straight-line method based on the following estimated useful lives: computer hardware and software is depreciated over three years; equipment, furniture and fixtures is depreciated over five years; and leasehold improvements are amortized over their estimated useful lives or the remaining lease term, whichever is shorter.

Maintenance and repairs are charged to expense as incurred, while renewals and improvements are capitalized.

Intangible Assets

The Company capitalizes payments it makes for licensed products when the payment relates to a U.S. Food and Drug Administration (“FDA”)-approved product, and the cost is recoverable based on expected future cash flows from the product. The cost is amortized on a straight-line basis over the estimated useful life of the product commencing on the approval date in accordance with Accounting Standards Codification (“ASC”) 350, Intangibles — Goodwill and Other. In November 2021, the Company purchased the rights for its Carglumic Acid product for $3,250, and that cost is being amortized over ten years. In September 2022, the Company purchased the rights for its Betaine Anhydrous product for $2,125, and that cost is being amortized over five years. In October 2023, the Company purchased the rights for its Nitisinone product for $650, and that cost is being amortized over five years. In March 2024, the Company purchased the rights for its PKU GOLIKE® product which resulted in a $1,868 intangible asset that is being amortized over ten years. The intangible assets, net on the Company’s balance sheet, reflected $2,039 of accumulated amortization as of September 30, 2024. The Company recorded $267 and $753, respectively, of amortization expense for the three and nine-month periods ended September 30, 2024. The table below shows the estimated remaining amortization for these products for each of the five years from 2024 to 2028 and thereafter.

Impairment of Long-Lived Assets

Long-lived assets are reviewed for impairment whenever events or changes in circumstances indicate that the carrying amount of an asset 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 estimated undiscounted future cash flows expected to be generated by the asset. If the carrying amount of an asset exceeds its estimated future cash flows, an impairment charge is recognized in the Company’s statements of operations for the amount by which the carrying amount of the asset exceeds the fair value of the asset. No impairment was recognized during the nine-month periods ended September 30, 2024 or 2023.

Deferred Financing Costs, Debt Discount and Detachable Debt-Related Warrants

Costs incurred to issue debt are deferred and recorded as a reduction to the debt balance in the accompanying balance sheets. The Company amortizes these costs over the expected term of the related debt under the effective interest method. Debt discounts related to the relative fair value of warrants issued in conjunction with debt are also recorded as a reduction to the debt balance and accreted over the expected term into interest expense using the effective interested method. The fair value of warrants related to the issuance of a delayed draw term loan commitment is capitalized as short-term assets. Once a draw is made, the unamortized asset is reclassified as a reduction to the related debt balance and amortized into interest expense under the effective interest method.

Leases

The Company accounts for leases in accordance with ASC Topic 842 – Leases. The Company reviews all relevant facts and circumstances of a contract to determine if it is a lease whereby the terms of the agreement convey the right to control the direct use and receive substantially all the economic benefits of an identified asset for a period of time in exchange for consideration. The associated right-of-use assets and lease liabilities are recognized at lease commencement. The Company measures lease liabilities based on the present value of the lease payments over the lease term discounted using the rate it would pay on a loan with the equivalent payments and term for the lease. The Company does not include the impact for lease term options that would extend or terminate the lease unless it is reasonably certain that it will exercise any such options. The Company accounts for the lease components separately from non-lease components for its operating leases.

The Company measures right-of-use assets based on the corresponding lease liabilities adjusted for (i) any prepayments made to the lessor at or before the commencement date, (ii) initial direct costs it incurs, and (iii) any incentives under the lease. In addition, the Company evaluates the recoverability of its right-of-use assets for possible impairment in accordance with its long-lived assets policy.

Operating leases are reflected on the balance sheets as operating lease right-of-use assets, current accrued liabilities, and long-term operating lease liabilities. The Company did not have any finance leases as of  September 30, 2024 or  December 31, 2023.

The Company commences recognizing operating lease expense when the lessor makes the underlying asset available for use by the Company and the operating lease expense is recognized on a straight-line basis over the term of the lease. Variable lease payments are expensed as incurred.

The Company does not recognize right-of-use assets or lease liabilities for leases with a term of twelve months or less; such lease costs are recorded in the statements of operations on a straight-line basis over the lease term.

Concentrations of Credit Risk, Sources of Supply and Significant Customers

The Company is subject to credit risk for its cash and cash equivalents which are invested in high-grade money market funds and short-term U.S. treasury bills from time to time. The Company maintains its cash and cash equivalent balances with one major commercial bank, and the deposits held with the financial institution exceed the amount of insurance provided on such deposits and is exposed to credit risk in the event of a default by the financial institutions holding its cash and cash equivalents to the extent recorded on the balance sheets. The Company believes the associated credit risk to be minimal.

The Company is dependent on third-party suppliers for its products and product candidates. In particular, the Company relies, and expects to continue to rely, on a small number of suppliers to manufacture key chemicals, approved products and process its product candidates as part of its development programs. These programs could be adversely affected by a significant interruption in the manufacturing process.

The Company is also subject to credit risk from its accounts receivable related to product sales as it extends credit based on an evaluation of the customer’s financial condition, and collateral is not required. The Company considers historical collection rates and the current financial status of its customers, as well as information from internal and external sources, macroeconomic and industry-specific factors, current conditions, and reasonable and supportable forecasts when evaluating potential credit losses. Historically, the Company's accounts receivable balances have been highly concentrated with a select number of customers, consisting primarily of specialty pharmacies and large wholesale pharmaceutical distributors. Given the size and creditworthiness of these customers, we have not experienced and do not expect to experience material credit losses. Based upon the review of these factors, the Company did not record an allowance for credit losses at  September 30, 2024 or 2023. The accounts receivable balance at  September 30, 2024 and  December 31, 2023, and product sales revenue recognized during the nine-month periods ended September 30, 2024 and 2023, primarily consist of sales to and amounts due from AnovoRx for sales of the Company’s ALKINDI SPRINKLE® and Carglumic Acid products. AnovoRx sales made up 93.6% of total net revenues recognized in the nine-month period ended September 30, 2024 and 98.5% of net accounts receivable as of September 30, 2024, and 72.9% of total net revenues recognized in the nine-month period ended September 30, 2023, and 97.4% of net accounts receivable as of  December 31, 2023. Given the size and creditworthiness of these customers, we have not experienced and do not expect to experience material credit losses.

Revenue Recognition for Contracts with Customers

The Company accounts for contracts with its customers in accordance with ASC 606 – Revenue from Contracts with Customers. ASC 606 applies to all contracts with customers, except for contracts that are within the scope of other standards. Under ASC 606, an entity recognizes revenue when its customer obtains control of promised goods or services in an amount that reflects the consideration the entity expects to receive in exchange for those goods or services. To determine revenue recognition for arrangements that an entity determines are within the scope of ASC 606, the entity performs the following five steps: (i) identify the contract(s) with a customer; (ii) identify the performance obligations in the contract; (iii) determine the transaction price; (iv) allocate the transaction price to the performance obligations in the contract; and (v) recognize revenue when (or as) the entity satisfies a performance obligation.

At contract inception, once the contract is determined to be within the scope of ASC 606, the Company assesses the goods or services promised within each contract and determines those that are performance obligations to assess whether each promised good or service is distinct. The Company then recognizes as revenue the amount of the transaction price that is allocated to the respective performance obligation when (or as) the performance obligation is satisfied. Arrangements that include rights to additional goods or services that are exercisable at a customer’s discretion are generally considered options. The Company assesses whether these options provide a material right to the customer and, if so, they are considered performance obligations. The exercise of a material right is accounted for as a contract modification for accounting purposes.

The Company recognizes as revenue the amount of the transaction price allocated to the respective performance obligation when (or as) each performance obligation is satisfied at a point in time or over time, and if over time this is based on the use of an output or input method. Any amounts received prior to revenue recognition will be recorded as deferred revenue. Amounts expected to be recognized as revenue within the twelve months following the balance sheet date will be classified as current portion of deferred revenue in the Company’s balance sheets. Amounts not expected to be recognized as revenue within the twelve months following the balance sheet date are classified as long-term deferred revenue, net of current portion.

Milestone Payments – If a commercial contract arrangement includes development and regulatory milestone payments, the Company will evaluate whether the milestone conditions have been achieved and if it is probable that a significant revenue reversal would not occur before recognizing the associated revenue. Milestone payments that are not within the Company’s control or the licensee’s control, such as regulatory approvals, are generally not considered probable of being achieved until those approvals are received.

Royalties – For arrangements that include sales-based royalties, including milestone payments based on a level of sales, which are the result of a customer-vendor relationship and for which the license is deemed to be the predominant item to which the royalties relate, the Company will 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.

Significant Financing Component – In determining the transaction price, the Company will adjust consideration for the effects of the time value of money if the expected period between payment by the licensees and the transfer of the promised goods or services to the licensees will be more than one year.

The Company sells its ALKINDI SPRINKLE®, Carglumic Acid, Betaine Anhydrous, Nisitinone, and PKU GOLIKE® products to pharmacy distributor customers which provide order fulfilment and inventory storage/distribution services. The Company may sell products in the U.S. to wholesale pharmaceutical distributors, who then sell the product to hospitals and other end-user customers. Sales to wholesalers are made pursuant to purchase orders subject to the terms of a master agreement, and delivery of individual shipments represent performance obligations under each purchase order. The Company uses a third-party logistics (“3PL”) vendor to process and fulfill orders and has concluded it is the principal in the sales to wholesalers because it controls access to the 3PL vendor services rendered and directs the 3PL vendor activities. The Company has no significant obligations to wholesalers to generate pull-through sales.

For its ALKINDI SPRINKLE®, Carglumic Acid, Betaine Anhydrous, Nisitinone, and PKU GOLIKE® products, the Company bills at the initial product list price which are subject to offsets for patient co-pay assistance and potential state Medicaid reimbursements which are estimated and recorded as a reduction of net revenues at the date of sale/shipment. Selling prices initially billed to wholesalers are subject to discounts for prompt payment and subsequent chargebacks when the wholesalers sell products at negotiated discounted prices to members of certain group purchasing organizations (“GPOs”) and government programs. Because of the shelf life of the product and the Company’s lengthy return period, there may be a significant period of time between when the product is shipped and when it issues credits on returned product.

The Company estimates the transaction price when it receives each purchase order taking into account the expected reductions of the selling price initially billed to the wholesaler/distributor arising from all of the above factors. The Company has developed estimates for future returns and chargebacks and the impact of other discounts and fees it pays. When estimating these adjustments to the transaction price, the Company reduces it sufficiently to be able to assert that it is probable that there will be no significant reversal of revenue when the ultimate adjustment amounts are known.

The Company stores its ALKINDI SPRINKLE®, Carglumic Acid, Betaine Anhydrous, Nisitinone, and PKU GOLIKE® inventory at its pharmacy distributor customer locations, and revenue is recorded when stock is pulled and shipped to fulfill specific orders. The Company may recognize revenue and cost of sales from products sold to wholesalers upon delivery to the wholesaler location. At that time, the wholesalers take control of the product as they take title, bear the risk of loss of ownership and have an enforceable obligation to pay the Company. They also have the ability to direct sales of product to their customers on terms and at prices they negotiate. Although wholesalers have product return rights, the Company does not believe they have a significant incentive to return the product.

Upon recognition of revenue from product sales, the estimated amounts of credit for product returns, chargebacks, distribution fees, prompt payment discounts, state Medicaid and GPO fees are included in sales reserves, accrued liabilities and net accounts receivable. As of September 30, 2024 and December 31, 2023, estimated state Medicaid liability was $8,047 and $3,627, respectively. The Company monitors actual product returns, chargebacks, discounts and fees subsequent to the sale. If these amounts end up differing from its estimates, it will make adjustments to these allowances, which are applied to increase or reduce product sales revenue and earnings in the period of adjustment.

Cost of Sales

Cost of product sales consists of the profit-sharing and royalty fees with the Company’s product licensing and development partners, the purchase costs for finished products from third-party manufacturers, freight and handling/storage from the Company’s 3PL logistics service providers, and amortization expense of certain intangible assets. The costs of sales for profit-sharing, royalty fees, purchased finished products, and the associated inbound freight expense are recorded when the associated product sale revenue is recognized in accordance with the terms of shipment to customers while outbound freight and handling/storage fees charged by the 3PL service provider are expensed as they are incurred. Intangible assets are amortized on a straight-line basis over the estimated useful life of the product. Cost of product sales also reflects any write-downs or reserve adjustments for the Company’s inventories.

Cost of licensing revenue consists of the profit-sharing fees related to the Company’s product licensing and development partners.

Research and Development Expenses

Research and development (“R&D”) expenses include both internal R&D activities and external contracted services. Internal R&D activity expenses include salaries, benefits, stock-based compensation, and other costs to support the Company’s R&D operations. External contracted services include product development efforts such as certain product licensor milestone payments, clinical trial activities, manufacturing and control-related activities, and regulatory costs. R&D expenses are charged to operations as incurred. The Company reviews and accrues R&D expenses based on services performed and relies upon estimates of those costs applicable to the stage of completion of each project. Significant judgments and estimates are made in determining the accrued balances at the end of any reporting period. Actual results could differ from the Company’s estimates.

Upfront payments and milestone payments made for the licensing of products that are not yet approved by the FDA are expensed as R&D in the period in which they are incurred. Nonrefundable advance payments for goods or services to be received in the future for use in R&D activities are recorded as prepaid expenses and are expensed as the related goods are delivered or the services are performed.

Income Taxes

As part of the process of preparing the Company’s financial statements, the Company must estimate the actual current tax liabilities and assess temporary differences resulting from differing treatment of items for tax and accounting purposes. These differences result in deferred tax assets and liabilities, which are included within the balance sheets. The Company must assess the likelihood that the deferred tax assets will be recovered from future taxable income and, to the extent the Company believes that recovery is not likely, a valuation allowance must be established. To the extent the Company establishes a valuation allowance or increase or decrease to this allowance in a period, the impact will be included in income tax expense in the statements of operations. As of September 30, 2024 and December 31, 2023, the Company has established a 100% valuation reserve against its deferred tax assets.

The Company recorded income tax benefit of ($126) and zero for the three-month periods ended September 30, 2024 and 2023, respectively. The Company recorded income tax benefit of ($72) and zero for the nine-month periods ended September 30, 2024 and 2023, respectively. Our effective tax rate was (25.1%) for the three-month period ended September 30, 2024 and zero for the three month period ended September 30, 2023. Our effective tax rate was 2.4% for the nine-month period ended September 30, 2024 and zero for the nine-month period ended September 30, 2023. The Company accounts for income taxes under the provisions of ASC 740 - Income Taxes. As of  September 30, 2024 and  December 31, 2023, there were no unrecognized tax benefits included in the balance sheets that would, if recognized, affect the effective tax rate. The Company’s practice is to recognize interest and penalties related to income tax matters in income tax expense. The Company had no accrual for interest or penalties in its balance sheets at  September 30, 2024 and  December 31, 2023, and has not recognized interest and penalties in the statement of operations for the nine-month periods ended September 30, 2024 and 2023.

In addition, under Sections 382 and 383 of the Internal Revenue Code of 1986, as amended, and corresponding provisions of state law, if a corporation undergoes an “ownership change,” which is generally defined as a greater than 50% change (by value) in its equity ownership over a three-year period, the corporation’s ability to use its pre-change NOL carryforwards and other pre-change tax attributes (such as research tax credits) to offset its post-change income may be limited.

Income (Loss) Per Share

Basic net income (loss) per share of common stock is computed by dividing net income (loss) attributable to common stockholders for the period by the weighted average number of shares of common stock outstanding during the period. Diluted net income (loss) per share is computed by dividing the net income (loss) attributable to common stockholders for the period by the weighted average number of common and common equivalent shares, such as unvested restricted stock, stock options, RSUs and warrants that are outstanding during the period. Common stock equivalents are excluded from the computation when their inclusion would be anti-dilutive. For the three-month periods ended September 30, 2024 and 2023, common stock equivalents excluded 4,896,038 and 5,618,663, respectively, that were anti-dilutive. For the nine-month periods ended September 30, 2024 and 2023, common stock equivalents excluded 6,319,907 and 4,821,906, respectively, that were anti-dilutive. Included in the basic and diluted net income (loss) per share calculation are RSUs awarded to directors that have vested, but the issuance and delivery of the shares of common stock are deferred until the director retires from service as a director.

Stock-Based Compensation

The Company accounts for stock-based compensation under the provisions of ASC 718 Compensation – Stock Compensation. The guidance under ASC 718 requires companies to estimate the fair value of the stock-based compensation awards on the date of grant and record expense over the related service periods, which are generally the vesting period of the equity awards.

The Company estimates the fair value of stock-based option awards using the Black-Scholes option-pricing model (“BSM”). The BSM requires the input of subjective assumptions, including the expected stock price volatility, the calculation of expected term, forfeitures and the fair value of the underlying common stock on the date of grant, among other inputs. The risk-free interest rate was determined from the implied yields for zero-coupon U.S. government issues with a remaining term approximating the expected life of the options or warrants. Dividends on common stock are assumed to be zero for the BSM valuation of the stock options. The expected term of stock options granted is based on vesting periods and the contractual life of the options. Expected volatilities are based on the Company's historical volatility subsequent to our IPO, which we believe represents the most accurate basis for estimating expected future volatility under the current conditions. We account for forfeitures as they occur.

Fair Value Measurements

We measure certain of our assets and liabilities at fair value. Fair value represents the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date. Fair value accounting requires characterization of the inputs used to measure fair value into a three-level fair value hierarchy as follows:

Level 1 — Inputs based on quoted prices in active markets for identical assets or liabilities. An active market is a market in which transactions occur with sufficient frequency and volume to provide pricing information on an ongoing basis.

Level 2 — Observable inputs that reflect the assumptions market participants would use in pricing the asset or liability developed based on market data obtained from sources independent from the entity.

Level 3 — Unobservable inputs that reflect the entity’s own assumptions about the assumptions market participants would use in pricing the asset or liability developed based on the best information available.

Fair value measurements are classified based on the lowest level of input that is significant to the measurement. The Company’s assessment of the significance of a particular input to the fair value measurement requires judgment, which may affect the valuation of the assets and liabilities and their placement within the fair value hierarchy levels. The determination of the fair values stated below take into account the market for the Company’s financials, assets and liabilities, the associated credit risk and other factors as required. The Company considers active markets as those in which transactions for the assets or liabilities occur in sufficient frequency and volume to provide pricing information on an ongoing basis.

The Company’s financial instruments include cash and cash equivalents, accounts receivable, accounts payable, accrued liabilities, and debt obligation. The carrying amounts of these financial instruments approximate their fair values due to the short-term maturities of these instruments. Based on borrowing rates currently available to the Company, the carrying value of the debt obligation approximates its fair value.

Impact of Recent Accounting Pronouncements

In November 2023, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) No. 2023-07 Segment Reporting - Improving Reportable Segment Disclosures. The standard requires enhanced disclosures of a public company's significant segment expenses that are regularly provided to the chief operating decision maker (“CODM”), and any additional measures of a segment's profit or loss used by the CODM when making resource allocation decisions, including for companies with a single reportable segment. The standard is effective for public companies for annual periods after December 15, 2023 and in interim periods in 2025, with early adoption permitted. The Company is continuing to assess the potential impacts of the amendments, and it does not expect this pronouncement to have a material effect on its financial statements as the Company only has one reportable segment.

In December 2023, the FASB issued ASU No. 2023-09, Income Taxes - Improvements to Income Tax Disclosures. The standard requires enhanced income tax disclosures, including the effective tax rate reconciliation and income taxes paid, amongst others. The standard will be effective for public companies for annual periods beginning in 2025, with early adoption permitted. The Company is currently assessing the impact of adopting this guidance on its financial statements.

Note 4 – Property and Equipment

Property and equipment consist of the following:

Depreciation expense for the three-month periods ended September 30, 2024 and 2023 was $12 and $9, respectively. Depreciation expense for the nine-month periods ended September 30, 2024 and 2023 was $38 and $32, respectively.

Note 5 — Long-Term Debt

SWK Loan

In November 2019, the Company entered into a credit agreement (the “SWK Credit Agreement”) with SWK Holdings Corporation (“SWK”) which provided for up to $10,000 in financing. The Company received proceeds of $5,000 at closing and borrowed an additional $5,000 upon the FDA approval of a second product developed by the Company. In March 2020, the Company and SWK amended the SWK Credit Agreement, and the Company borrowed an additional $2,000 in August 2020. The term of the SWK Credit Agreement is for five years, and borrowings bear interest at a rate of LIBOR 3-month plus 10.0%, subject to a stated LIBOR floor rate of 2.0%. A 2.0% unused credit limit fee was assessed during the first twelve months after the date of the SWK Credit Agreement and loan fees include a 5.0% exit fee based on the principal amounts drawn which is payable at the end of the term of the SWK Credit Agreement. The Company was required to maintain a minimum cash balance of $3,000, only pay interest on the debt until February 2022 and then pay 5.5% of the loan principal balance commencing on February 15, 2022 and then every three months thereafter until November 13, 2024 at which time the remaining principal balance is due. Borrowings under the SWK Credit Agreement are secured by the Company’s assets. The SWK Credit Agreement contains customary default provisions and covenants which limit additional indebtedness.

In connection with the initial $5,000 borrowed under the SWK Credit Agreement, the Company issued warrants to SWK to purchase 51,239 shares of the Company’s common stock with an exercise price of $5.86 per share. The relative fair value of these warrants was $226 and was estimated using BSM with the following assumptions: fair value of the Company’s common stock at issuance of $5.75 per share; seven-year contractual term; 95% volatility; 0% dividend rate; and a risk-free interest rate of 1.8%.

In connection with the additional $2,000 borrowed in August 2020, the Company issued warrants for 18,141 shares of its common stock at an exercise price of $6.62 per share. The relative fair value of the 18,141 warrants was $94 and was estimated using BSM with the following assumptions: fair value of the Company’s common stock at issuance of $6.85 per share; seven-year contractual term; 95% volatility; 0% dividend rate; and a risk-free interest rate of 0.4%.

In April 2022, the Company and SWK further amended the SWK Credit Agreement to allow for a deferral of loan principal payments until May 2023 and reduce the interest rate to LIBOR 3-month plus 8.0%, subject to a stated LIBOR floor rate of 2.0%. Because LIBOR was phased out as of June 30, 2023, the Company amended the Credit Agreement in August 2023 to refer to the secured overnight financing rate ("Term SOFR"), with an interest rate of Term SOFR plus 8.26%, subject to a stated Term SOFR floor rate of 5.0%.

In September 2024, the Company and SWK further amended the SWK Credit Agreement to extend the maturity date of the existing loan to December 31, 2024 and expand the credit facility by $25,695 to $30,000, contingent upon closing of the October 2024 purchase agreement for Increlex® (see Note 12). Under the terms of the amendment, the facility’s maturity will be extended to 3 years from closing of the October 2024 purchase agreement and reduce the annual interest rate to Term SOFR plus 6.75% with no change to the Term SOFR floor rate of 5.0%. In accordance with the change, the Company has classified $4,125 as principal due in the next 12 months in its balance sheet at September 30, 2024.

In connection with the additional $25,695 to be borrowed at closing of the October 2024 purchase agreement, the Company has agreed to issue warrants for 289,736 shares of its common stock at an exercise price of $5.32 per share. The pro rata fair value of the warrants related to the extension of the debt is deferred and recorded as a reduction to the debt balance in the accompanying balance sheets, and the Company amortizes these costs over the expected term of the related debt under the effective interest method. The pro rata fair value of the warrants related to the issuance of a delayed draw term loan commitment is capitalized as short-term assets. Once a draw is made, the unamortized asset is reclassified as a reduction to the related debt balance and amortized into interest expense under the effective interest method. All warrants (the “SWK Warrants”) are exercisable upon issuance and have a term of seven years from the date of issuance. The SWK Warrants are subject to a cashless exercise feature, with the exercise price and number of shares issuable upon exercise subject to change in connection with stock splits, dividends, reclassifications and other conditions.

Interest expense of $211 was recorded during the three months ended September 30, 2024, which included $22 of debt discount amortization. Interest expense of $267 was recorded during the three months ended September 30, 2023, which included $29 of debt discount amortization. Interest expense of $672 was recorded during the nine months ended September 30, 2024, which included $70 of debt discount amortization. Interest expense of $805 was recorded during the nine months ended September 30, 2023, which included $90 of debt discount amortization. As of September 30, 2024, $408 of accrued interest is included in accrued liabilities. As of December 31, 2023, $332 of accrued interest is included in accrued liabilities.

The table below reflects the future payments for the SWK loan principal and interest as of September 30, 2024.

Note 6 — Common Stock

The Company has 50,000,000 authorized shares of $0.001 par value common stock under its Amended and Restated Certificate of Incorporation.

During the nine months ended September 30, 2024, the Company issued 2,500 shares of its common stock resulting from stock option exercises under its 2018 Equity Incentive Plan as amended in December 2020. In June 2024 the Company issued 55,240 shares of its common stock to employees in accordance with its 2018 Employee Stock Purchase Plan (“ESPP”) (see Note 8), and in July 2024 the Company issued 90,402 shares of its common stock resulting from the vesting of restricted stock units. During the nine months ended September 30, 2023, the Company issued 298,528 shares of its common stock resulting from cash and non-cash stock option exercises under its 2018 Equity Incentive Plan (see Note 8) and from the vesting of restricted stock units. The Company withheld 50,867 shares for payroll tax obligations totaling $181 for the nine months ended September 30, 2023. In June 2023 the Company issued 57,616 shares of its common stock to employees in accordance with its ESPP (see Note 8).

Note 7 — Common Stock Warrants

The Company’s outstanding warrants to purchase shares of its common stock at September 30, 2024 are summarized in the table below.

The holders of these warrants or their permitted transferees, are entitled to rights with respect to the registration under the Securities Act of 1933, as amended (the “Securities Act”) for their shares that are converted to common stock, including demand registration rights and piggyback registration rights. These rights are provided under the terms of a registration rights agreement between the Company and the investors. The third tranche of warrants is not yet exercisable at  September 30, 2024 and would become exercisable when the term loan is drawn upon closing of the October 2024 purchase agreement for Increlex® (see Note 5).

Note 8 — Share-Based Payment Awards

The Company adopted the Eton Pharmaceuticals, Inc. 2017 Equity Incentive Plan (the “2017 Plan”), which authorized the issuance of up to 5,000,000 shares of the Company’s common stock, and in 2018 it adopted the 2018 Equity Incentive Plan as amended December 2020 (the “2018 Plan”) which replaced the 2017 Plan. The Company has granted restricted stock awards (“RSAs”), stock options and RSUs for its common stock under both plans as detailed in the tables below. There were 470,511 shares available for future issuance under the 2018 Plan as of September 30, 2024.

Share awards that expire, terminate, are surrendered, or canceled without having been fully exercised will be available for future awards under the 2018 Plan. In addition, the 2018 Plan provides that commencing January 1, 2019 and through January 1, 2028, the share reserve will be increased annually by 4% of the total number of shares of common stock outstanding as of the preceding December 31, subject to a reduction at the discretion of the Company’s board of directors. The exercise price for stock options granted is not less than the fair value of common stock as determined by the board of directors as of the date of grant. The Company uses the closing stock price on the date of grant as the exercise price.

To date, all stock options issued have been non-qualified stock options, and the exercise prices were set at the fair value for the shares at the dates of grant. Options typically have a ten-year life.

The Company’s previous Chief Financial Officer had 474,295 employee stock options with an exercise price range of $1.37 to $8.61 which were set to expire three months after his retirement date of May 31, 2022; however, the Company extended the expiration date to April 10, 2023. Of these options, 365,858 options were exercised on a cashless basis in January and March 2023, and the remainder expired in April 2023. No other terms were modified.

In August 2024, the Company’s board of directors approved a modification of certain outstanding awards of a senior executive who retired in August 2024. The combined awards had an exercise price range of $3.47 to $8.61 which were set to expire 90 days after retirement or termination as the case may be, and the Company extended the expiration dates to November 2025 in conjunction with ongoing consulting services. No other terms were modified. Due to these modifications, the Company incurred a modification expense of $75 that is included in general and administration expense on the Consolidated Statements of Operations for the three and nine-month periods ended September 30, 2024, respectively.

For the three and nine months ended September 30, 2024 and 2023, the Company’s total stock-based compensation expense was $2,383 and $2,387, respectively. Of these amounts, $2,138 and $2,191 were recorded in general and administrative (“G&A”) expenses, respectively, and $245 and $196 were recorded in research and development expenses, respectively.

Stock Options

The following table summarizes stock option activity during the nine months ended September 30, 2024:

Note 8 — Share-Based Payment Awards (continued)

The aggregate intrinsic value of stock options is calculated as the difference between the exercise price of the stock options and the fair value of the Company’s common stock at September 30, 2024 for those stock options that had strike prices lower than the fair value of the Company’s common stock.

Stock-based compensation related to stock options was $559 and $639 for the three-month periods ended September 30, 2024 and 2023, respectively. Stock based compensation related to stock options was $1,991 and $2,115 for the nine-month periods ended September 30, 2024 and 2023, respectively. As of September 30, 2024, there was a total of $5,266 of unrecognized compensation costs related to non-vested stock option awards. The weighted average grant date fair value of stock option awards for the nine months ended September 30, 2024 was $2.94 per share. In the nine months ended September 30, 2024, the Company issued 2,500 shares of its stock resulting from stock option exercises at a weighted average exercise price of $2.97 per share with an intrinsic value of $2.

Restricted Stock Units (RSUs)

The following table summarizes restricted stock unit activity during the nine months ended September 30, 2024:

Stock-based compensation related to RSUs was $171 and $179 for the nine-month periods ended September 30, 2024 and 2023, respectively. As of September 30, 2024, there was $376 of unrecognized stock-based compensation expense related to unvested RSUs, which will be recognized over a weighted average period of approximately 1.8 years.

Employee Stock Purchase Plan

The Company’s 2018 Employee Stock Purchase Plan (“ESPP”) provides for an initial reserve of 150,000 shares, and this reserve is automatically increased on January 1 of each year by the lesser of 1% of the outstanding common shares at December 31 of the preceding year or 150,000 shares, subject to reduction at the discretion of the Company’s board of directors. As of September 30, 2024, there were 718,274 shares available for issuance under the ESPP.

The annual offerings consist of two stock purchase periods, with the first purchase period ending in June and the second ending in December. The terms of the ESPP permit employees of the Company to use payroll deductions to purchase stock at a price per share that is at least the lesser of (1) 85% of the fair market value of a share of common stock on the first date of an offering or (2) 85% of the fair market value of a share of common stock on the date of purchase. After the offering period ends, subsequent twelve-month offering periods automatically commence over the term of the ESPP on the day that immediately follows the conclusion of the preceding offering, each consisting of two purchase periods approximately six months in duration. The terms of the ESPP provide a restart feature if the Company's stock price is lower at the end of a six-month period within the twelve-month offering period than it was at the beginning of the twelve-month offering period.

For the nine-month periods ended September 30, 2024 and 2023, there were 55,240 and 57,616 share issuances, respectively, under the ESPP. The weighted average fair value of share awards in the first nine months of 2024 and 2023 was $1.34 and $1.22, respectively. Employees contributed $209 and $181 via payroll deductions during the three and nine months ended September 30, 2024 and 2023, respectively. The Company recorded an expense of $145 and $93 related to the ESPP in the nine-month periods ended September 30, 2024 and 2023, respectively. As of September 30, 2024 and December 31, 2023, the accompanying condensed balance sheets include $48 and $24, respectively, in accrued liabilities for employee ESPP contributions.

Note 9 — Related-Party Transactions

Chief Executive Officer

The CEO has a partial interest in a company that the Company had partnered with for its EM-100/Alaway® Preservative Free eye allergy product as described below.

The Company acquired the exclusive rights to sell the EM-100 product in the United States pursuant to a Sales and Marketing Agreement (the “Eyemax Agreement”) dated August 11, 2017, between the Company and Eyemax LLC (“Eyemax”), an entity affiliated with the Company’s CEO. Under the terms of the Eyemax Agreement, the Company would pay Eyemax $250 upon FDA approval, $500 upon the first commercial sale of the product, and a royalty of 10% on the net sales of all products. The Eyemax Agreement was for an initial term of ten years from the date of the Eyemax Agreement, subject to successive two-year renewals unless the Company elected to terminate the Eyemax Agreement. 

On February 18, 2019, the Company entered into an Amended and Restated Agreement with Eyemax amending the Sales Agreement (the “Amended Agreement”). Pursuant to the Amended Agreement, Eyemax sold the Company all of its right, title and interest in EM-100, including any such product that incorporates or utilizes Eyemax’s intellectual property rights. Pursuant to the Amended Agreement, the Company paid Eyemax two milestone payments: (i) one milestone payment for $250 upon regulatory approval in the territory by the FDA of the first single agent product and (ii) one milestone payment for $500 following the first commercial sale of the first single agent product in the territory. From the effective date of the Amended Agreement, the Company has realized a total of $1,840 of the non-royalty and royalty revenue through  September 30, 2024. The EM-100 asset and its associated product rights were sold to Bausch Health on February 18, 2019, and future potential royalties of twelve percent on Bausch Health sales of the product, named Alaway® Preservative Free by Bausch, which was approved by the FDA in September 2020, would be split between Eyemax and the Company. There were no amounts due to Eyemax under the terms of the Amended Agreement as of September 30, 2024, and Bausch Health discontinued sales of Alaway® Preservative Free effective March 24, 2023.

The CEO has a partial interest in a company that the Company has entered into an agreement with as described below.

Previously, the Company acquired DS-200 and all related intellectual property pursuant to an asset purchase agreement (the “Selenix Agreement”) dated June 23, 2017 between the Company and Selenix LLC (“Selenix”), an entity affiliated with the CEO. On August 30, 2024, the Company amended the Selenix Agreement in tandem with an agreement to sell DS-200 in August 2024 (see Note 11). Pursuant to the terms of the amended Selenix Agreement, Selenix waived its rights to future milestone payments and 50% of DS-200 profit in exchange for 45% of proceeds received by Eton from the DS-200 sale agreement. Selenix is 50% owned by Messa Holdings LLC (“Messa”), which is 100% owned by the CEO. As of September 30, 2024, the Company’s balance sheet reflected a $220 payment due to Selenix in accrued liabilities.

Note 10 — Leases

The Company recognizes a right-of-use (“ROU”) asset and a lease liability on the balance sheet for substantially all leases, including operating leases, and separates lease components from non-lease components related to its office space lease.

In June 2024, the Company renewed its office lease for a two-year period through March 2027 and recorded $219 in ROU assets and $219 in operating lease liabilities in association with the lease extension.

The Company’s operating lease cost as presented as G&A in the condensed statements of operations was $61 for the nine months ended September 30, 2024, and $57 for the nine months ended September 30, 2023. Cash paid for amounts included in the measurement of operating lease liabilities was $35 for the nine months ended September 30, 2024, and $66 for the nine months ended September 30, 2023. The ROU asset non-cash lease expense was $53 and $50 for the nine-month periods ended September 30, 2024 and 2023, respectively, and is reflected within non-cash lease expense on the Company’s condensed statements of cash flows. As of September 30, 2024, the weighted-average remaining lease term was 2.50 years, and the weighted-average incremental borrowing rate was 8.6%.

The table below presents the lease-related assets and liabilities recorded on the balance sheet as of September 30, 2024 (in thousands).

The Company’s future lease commitments as of September 30, 2024, are as indicated below:

Note 11 — Commitments and Contingencies

Legal

The Company is subject to legal proceedings and claims that may arise in the ordinary course of business. The Company is not aware of any pending or threatened litigation matters at this time that would have a material impact on the operations of the Company.

License and product development agreements

The Company has entered into various agreements in addition to those discussed above which are described below.

The three oral solution pediatric neurology product candidates discussed below, Topiramate, Zonisamide, and Lamotrigine were developed by the Company and its various product candidate development partners, and the Company subsequently sold certain rights and interests in these three products to Azurity in 2021, but retained rights to certain royalties. The Company has recognized $27,500 in milestone revenues to date from these three products, and in June 2023 the Company amended its asset purchase agreement with Azurity and sold the remaining royalty interests it received back to Azurity for $5,500. Azurity will assume royalty or profit share obligations owed to development partners as well as additional milestone payments based on sales volume targets.

In March 2020, the Company entered into an Exclusive Licensing and Supply Agreement (the “Alkindi License Agreement”) with Diurnal for marketing ALKINDI SPRINKLE® in the United States. In September 2020, ALKINDI SPRINKLE®’s New Drug Application (NDA) was approved by the FDA as a replacement therapy for pediatric patients with adrenocortical insufficiency.

For the initial licensing milestone fee, the Company paid Diurnal $3,500 in cash and issued 379,474 shares of its common stock to Diurnal which were valued at $1,264 based on the Company’s closing stock price of $3.33 on March 26, 2020. The Company paid Diurnal $1,000 for a 2023 sales milestone in January 2024 that was recorded as licensing cost of sales in December 2023, and will also pay Diurnal $2,500 if the product obtains orphan drug exclusivity status from the FDA.

In June 2021, the Company acquired U.S. and Canadian rights to Crossject’s ZENEO® hydrocortisone needleless autoinjector, which is under development as a rescue treatment for adrenal crisis. The Company paid Crossject $500 upon signing, $500 in March 2022 upon a completion of a successful technical batch and could pay up to $3,500 in additional development milestones and up to $6,000 in commercial milestones, as well as a 10% royalty on net sales.

In October 2021, the Company acquired the U.S. marketing rights to Carglumic Acid Tablets. The product’s Abbreviated New Drug Application (“ANDA”), which is owned by Novitium Pharma, was approved by the FDA on October 12, 2021. The product is an AB-rated, substitutable generic version of Carbaglu®. The Company paid $3,250 upon signing and retains 50% of the product profits with the balance being distributed to the licensor and manufacturer. The Company launched this product in December 2021.

Note 11 — Commitments and Contingencies (continued)

In September 2022, the Company acquired an FDA-approved ANDA for Betaine Anhydrous for oral solution. The ANDA was approved by the FDA in January 2022. The Company paid $2,000 to the seller upon signing and an additional $125 in November 2023, and could pay up to $1,000 in commercial milestones based on future product sales. The Company will retain 65% of the product profits with the balance being distributed to the licensor.

In March 2023, the Company acquired rare disease endocrinology product candidate ET-600 from Tulex Pharmaceuticals. The Company paid $450 to Tulex in July 2023 as a result of successful manufacturing of registration batches. The Company will pay Tulex $200 upon acceptance by the FDA of the NDA for the product, $250 upon first commercial sale of the product, and tiered royalties of 12.5% to 17.0% on net sales.

In October 2023, the Company acquired an FDA-approved ANDA for Nitisinone. The ANDA was approved by the FDA in May 2023. The Company paid $150 to the seller and an additional $500 of cure amounts owed to the manufacturer upon signing. The Company will retain 80% of the product profits with the balance being distributed to the manufacturer.

In March 2024, the Company acquired the rights to PKU GOLIKE® medical formula. The Company paid $2,350 to the seller upon signing, which was allocated as $482 of inventory and $1,868 of an intangible asset (product licensing rights) based on the relative fair value of the purchased assets. The Company could pay up to $2,000 in commercial milestones based on future product sales and will pay the seller a royalty of 30% of net sales, which will include the cost of the product.

In August 2024, the Company entered into an agreement to sell its DS-200 product candidate. The Company received $500 upfront and could receive additional payments of up to $6,500 based on the achievement of certain future regulatory and commercial milestones related to DS-200. The Company will retain 45% of the proceeds from the transaction with the balance being distributed to other partners.

Indemnification