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Summary of Significant Accounting Policies | 12 Months Ended
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Dec. 31, 2023
Summary of Significant Accounting Policies |
Summary of Significant Accounting Policies | 2. Summary of Significant Accounting Policies Basis of Presentation The accompanying financial statements include the accounts of the Company. The Company’s financial statements have been prepared in accordance with United States generally accepted accounting principles (‘‘GAAP’’). Any reference in these notes to applicable guidance is meant to refer to the authoritative GAAP as found in the Accounting Standards Codification (‘‘ASC’’) and Accounting Standards Update (‘‘ASU’’) of the Financial Accounting Standards Board (‘‘FASB’’). Use of Estimates The preparation of financial statements in accordance with GAAP requires management to make estimates and assumptions that affect the amounts reported in the financial statements and accompanying notes. These estimates and assumptions affect the reported amounts of assets and liabilities, the disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses for the period presented. Although actual results could differ from those estimates, management does not believe that such differences would be material. Cash and Cash Equivalents The Company considers all highly liquid investments with an original maturity of three months or less at the date of purchase to be cash equivalents. The Company deposits its cash primarily in checking, sweep account and money market accounts. Cash equivalents are stated at amortized cost, plus accrued interest, which approximates fair value. Marketable Securities Marketable securities primarily consist of government debt securities, corporate bonds and agency bonds. These marketable securities are classified as available-for-sale, and as such, are carried at fair value as determined by prices for identical or similar securities at the balance sheet date. Marketable securities consist of Level 2 financial instruments in the fair-value hierarchy. The Company’s policy is to classify all investments with contractual maturities within one year as current. At each reporting date, the Company evaluates the classification of its investments with maturities beyond one year based on the nature of the investment securities and whether the investments are considered available for use in current operations. Investment income is recognized when earned and reported net of investment expenses. Unrealized holding gains and losses are reported within accumulated other comprehensive income (loss) as a separate component of stockholders’ equity. The amortized cost of debt securities is adjusted for amortization of premiums and accretion of discounts to maturity. Such amortization and interest on securities are included in other income, net, on the Company’s statements of operations. At each balance sheet date, the Company assesses available-for-sale securities in an unrealized loss position to determine whether the unrealized loss is other-than-temporary. If a decline in the fair value of a marketable security below the Company’s cost basis is determined to be other-than-temporary, such marketable security is written down to its estimated fair value as a new cost basis and the amount of the write-down is included in earnings as an impairment charge. The Company considers factors including the significance of the decline in value compared to the cost basis, underlying factors contributing to a decline in the prices of securities in a single asset class, the length of time the market value of the security has been less than its cost basis, the security's relative performance versus its peers, sector or asset class, expected market volatility and the market and economy in general. The Company also evaluates whether it is more likely than not that it will be required to sell a security prior to recovery of its fair value. The cost of securities sold is based on the specific identification method. Concentration of Credit Risk Financial instruments that potentially expose the Company to concentrations of credit risk primarily consist of cash and cash equivalents. The Company maintains its cash and cash equivalents at two accredited financial institutions that are federally insured. While balances deposited often exceed federally insured limits, the Company does not believe that it is subject to unusual credit risk beyond the normal credit risk associated with commercial banking relationships. The Company's investment policy limits investments to certain types of debt securities issued by the U.S. government, its agencies and institutions and corporate bonds with investment-grade credit ratings and places restrictions on maturities and concentration by type and issuer. The counterparties are various corporations, financial institutions and government agencies of high credit standing. Fair Value of Financial Instruments ASC Topic 820, Fair Value Measurement (“ASC 820”), establishes a fair value hierarchy for instruments measured at fair value that distinguishes between assumptions based on market data (observable inputs) and the Company’s own assumptions (unobservable inputs). Observable inputs are inputs that market participants would use in pricing the asset or liability based on market data obtained from sources independent of the Company. Unobservable inputs are inputs that reflect the Company’s assumptions about the inputs that market participants would use in pricing the asset or liability and are developed based on the best information available in the circumstances. ASC 820 identifies fair value as the exchange price, or exit price, representing the amount that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants. As a basis for considering market participant assumptions in fair value measurements, ASC 820 establishes a three-tier value hierarchy that distinguishes between the following: Level 1—Quoted market prices in active markets for identical assets or liabilities. Level 2—Inputs other than Level 1 inputs that are either directly or indirectly observable, such as quoted market prices, interest rates and yield curves. Level 3—Unobservable inputs developed using estimates of assumptions developed by the Company, which reflect those that a market participant would use. Use of these inputs involves significant and subjective judgments to be made by a reporting entity – e.g., determining an appropriate adjustment to a discount factor for illiquidity associated with a given security. To the extent the valuation is based on models or inputs that are less observable or unobservable in the market, the determination of fair values requires more judgment. Accordingly, the degree of judgment exercised by the Company in determining fair value is greatest for instruments categorized as Level 3. A financial instrument’s level within the fair value hierarchy is based on the lowest level of any input that is significant to the fair value measurement. Property and Equipment, Net Property and equipment are valued at cost less accumulated depreciation. Depreciation is recognized on a straight-line basis over the estimated useful lives of the related assets. Leasehold improvements are amortized on a straight-line basis over the shorter of the useful life or term of the lease. Upon retirement or disposal, the cost and related accumulated depreciation are removed from the balance sheet and the resulting gain or loss is recorded to general and administrative expenses in the accompanying statement of operations and comprehensive loss. Routine expenditures for maintenance and repairs are expensed as incurred. Estimated useful lives for property and equipment are as follows: ​
​ | ​ | ​
​ |  | Estimated Useful Life
Computers and peripherals |  | 3 years
Equipment |  | 5 years
Furniture and fixtures |  | 7 years
Leasehold improvements |  | Lesser of estimated useful life or remaining lease term
​ The Company reviews long-lived assets, which primarily consist of property and equipment, for impairment whenever events or changes in circumstances indicate that the carrying amount of an asset or group of assets may not be fully recoverable based on the criteria for accounting for the impairment or disposal of long-lived assets under ASC Topic 360, Property, Plant and Equipment. These events or changes in circumstances may include a significant deterioration of operating results, changes in business plans, or changes in anticipated future cash flows. If an impairment indicator is present, the Company evaluates recoverability by comparing the carrying amount of the assets group to future undiscounted net cash flows expected to be generated by the assets group. Assets are grouped at the lowest level for which there is identifiable cash flows that are largely independent of the cash flows generated by other asset groups. If the total of the expected undiscounted future cash flows is less than the carrying amount of the asset, an impairment loss is recognized for the difference between the fair value and carrying value of assets within the group. Fair value is generally determined by estimates of discounted cash flows. The discount rate used in any estimate of discounted cash flows would be the rate required for a similar investment of like risk. No impairment losses were recognized during the years ended December 31, 2023 or 2022. Construction in progress (Note 5) is carried at cost and consists of specifically identifiable direct and indirect development and construction costs. While under construction, costs of the property are included in construction in progress until the property is placed in service, at which time costs are transferred to the appropriate property and equipment account including, but not limited to, leasehold improvements or other such accounts. Leases The Company determines if an arrangement is a lease or implicitly contains a lease at inception based on the lease definition and also determines if the lease is classified as an operating lease or finance lease, each in accordance with ASU No. 2016-02, Leases (Topic 842). Operating leases are included in operating lease right-of-use (ROU) assets and operating lease liabilities in its balance sheets. ROU assets represent the Company’s right to use an underlying asset for the lease term and lease liabilities represent the Company’s obligation to make lease payments arising from the lease. ROU assets and lease liabilities are recognized at the commencement date or the adoption date for existing leases based on the present value of lease payments over the lease term using an estimated discount rate. As the Company’s leases do not provide an implicit rate, the Company uses an incremental borrowing rate based on the information available at commencement date or the adoption date in determining the present value of lease payments over a similar term. In determining the estimated incremental borrowing rate, the Company considered a rate obtained from its primary banker for discussion purposes of a potential collateralized loan with a term similar to the lease term and the Company’s historical borrowing capability in the market. For operating leases, lease expense is recognized on a straight-line basis over the lease term. Lease and non-lease components within a contract are generally accounted for separately. ​ Preferred Stock The Company did not have any outstanding preferred stock as of December 31, 2023 and 2022. Collaboration Arrangements The Company assesses whether collaboration agreements are subject to Accounting Standards Codification (“ASC”) 808, Collaborative Arrangements ("ASC 808"), based on whether they involve joint operating activities involving two or more parties that are active participants in the activity and are exposed to significant risks and rewards dependent on the commercial success of the activities. A collaborative arrangement within the scope of ASC 808 may be partially (or entirely) within the scope of other guidance (including ASC 606). The Company evaluates the individual units of account (e.g., components) within a collaborative arrangement to assess the appropriate recognition and measurement. The Company accounts for components of a collaborative arrangement that are within the scope of other ASC guidance following the relevant provisions of that guidance rather than the guidance provided in ASC 808. ASC 808 states that a collaborative arrangement should be accounted for under ASC 606 when the counterparty is a customer for a distinct good or service (i.e., a unit of account). That is, the Company is required to apply the unit-of-account guidance in ASC 606 to determine the distinct components of a collaborative arrangement. If the counterparty is a customer for that distinct good or service (or bundle of goods and/or services), it is accounted for under ASC 606. For units of account that are in the scope of ASC 606, all of the guidance in ASC 606 applies, including the guidance on recognition, measurement, presentation and disclosure. The Company accounts for collaborative arrangements or components of collaborative arrangements that are outside the scope of other guidance by analogy to the authoritative accounting literature or, if there is no appropriate analogy, by using a reasonable, rational and consistently applied accounting policy election. When evaluating an appropriate analogy to other accounting guidance or an accounting policy for a collaborative arrangement, the Company assesses the nature of the arrangement, the nature of its business operations and the contractual terms of the arrangement. The Company recognizes the shared costs incurred that are not within the scope of other accounting literature as a component of the related expense in the period incurred by analogy to ASC 730, Research and Development, and records reimbursements from counterparties as an offset to the related research and development costs. Research and Development Costs, Including Clinical Trial Accruals Research costs consist of employee-related costs, contractor expenses, laboratory supplies and facility costs, for research and development of product candidates are expensed as incurred. Development costs, including clinical trial-related expenses, incurred by third parties, such as clinical research organizations (“CROs”), are expensed as the contracted work is performed. Where contingent milestone payments are due to third parties under research and development arrangements, the milestone payment obligations are expensed when the milestone results are probable of being achieved. When evaluating the adequacy of the accrued liabilities, the Company analyzes progress of the studies, including the phase or completion of events, invoices received and contracted costs. Clinical trial expenses are a significant component of research and development expenses, and the Company outsources a significant portion of these costs to third parties. Third-party clinical trial expenses include investigator fees, site and patient costs, CRO costs, and costs for central laboratory testing and data management. The accrual for site and patient costs includes inputs such as estimates of patient enrollment, patient cycles incurred, clinical site activations, and other pass-through costs. These inputs are required to be estimated due to a lag in receiving the actual clinical information from third parties. Payments for these activities are based on the terms of the individual arrangements, which may differ from the pattern of costs incurred, and are reflected on the balance sheets as a prepaid asset or accrued expenses. These third-party agreements are generally cancelable, and related costs are recorded as research and development expenses as incurred. Non-refundable advance clinical payments for goods or services that will be used or rendered for future research and development activities are recorded as a prepaid asset and recognized as expense as the related goods are delivered or the related services are performed. When evaluating the adequacy of the accrued expenses, the Company analyzes progress of the studies, including the phase or completion of events, invoices received and contracted costs. Significant judgments and estimates may be made in determining the accrued balances at the end of any reporting period. Actual results could differ from the estimates made. The historical clinical accrual estimates have not been materially different from the actual costs. Patent Costs All patent-related costs incurred in connection with filing and prosecuting patent applications are expensed as incurred due to the uncertainty about the recovery of the expenditure. Amounts incurred are classified as general and administrative expenses in the accompanying statement of operations and comprehensive loss. Stock-Based Compensation The Company accounts for its stock-based compensation in accordance with ASC Topic 718, Compensation-Stock Compensation (“ASC 718”). ASC 718 requires all share-based payments to employees, consultants and directors, including grants of incentive stock options, nonqualified stock options, restricted stock awards, unrestricted stock awards or restricted stock units to employees, consultants and directors of the Company, to be recognized as expense in the statement of operations and comprehensive loss based on their grant date fair values. The Company estimates the fair value of options granted using the Black-Scholes option pricing model (“Black-Scholes”) for stock option grants to both employees and non-employees and the fair value of common stock to determine the fair value of restricted stock. The Black-Scholes option pricing model requires inputs based on certain subjective assumptions, including (i) the expected stock price volatility, (ii) the expected term of the award, (iii) the risk-free interest rate and (iv) expected dividends. Due to the lack of a public market for the Company’s common stock and lack of company-specific historical and implied volatility data, the Company has based its computation of expected volatility on the historical volatility of a representative group of public companies with similar characteristics to the Company, including stage of product development and life science industry focus. The historical volatility is calculated based on a period of time commensurate with expected term assumption. The Company uses the simplified method as prescribed by the SEC Staff Accounting Bulletin No. 107, Share-Based Payment, to calculate the expected term for options granted to employees as it does not have sufficient historical exercise data to provide a reasonable basis upon which to estimate the expected term. The expected term is applied to the stock option grant group as a whole, as the Company does not expect substantially different exercise or post-vesting termination behavior among its employee population. For options granted to non-employees, the Company utilizes the simplified method also as the basis for the expected term assumption. The risk-free interest rate is based on a treasury instrument whose term is consistent with the expected term of the stock options. The expected dividend yield is assumed to be zero because the Company has never paid dividends and has no current plans to pay any dividends on its common stock. The Company recognizes forfeitures as they occur as allowed by ASU No. 2016-09, Improvements to Employee Share-Based Payment Accounting (“ASU 2016-09”). There are significant judgments and estimates inherent in the determination of the fair value of the Company’s common stock. These estimates and assumptions include a number of objective and subjective factors, including external market conditions, the prices at which the Company sold shares of preferred stock, the superior rights and preferences of securities senior to its common stock at the time of a liquidity event, such as the IPO or a sale, and the likelihood of such an event. The Company expenses the fair value of its share-based compensation awards on a straight-line basis over the requisite service period, which is generally the vesting period. Income Taxes The Company uses the asset and liability method of accounting for income taxes. Deferred tax assets and liabilities are recognized for the estimated future tax consequences attributable to temporary differences between the financial statement carrying amounts of existing assets and liabilities and their respective tax base. Deferred tax assets and liabilities, which relate primarily to the carrying amount of the Company’s its net operating loss carryforwards, are measured using enacted tax rates expected to apply to taxable income in the years in which those temporary differences are expected to be recovered or settled. Deferred tax expense or benefit is the result of changes in the deferred tax assets and liabilities. Valuation allowances are established when necessary to reduce deferred tax assets where, based upon the available evidence, the Company concludes that it is more-likely-than-not that the deferred tax assets will not be realized. In evaluating its ability to recover deferred tax assets, the Company considers all available positive and negative evidence, including its operating results, ongoing tax planning and forecasts of future taxable income on a jurisdiction-by-jurisdiction basis. Because of the uncertainty of the realization of deferred tax assets, the Company has recorded a full valuation allowance against its deferred tax assets as of December 31, 2023 and 2022. Reserves are provided for tax benefits for which realization is uncertain. Such benefits are only recognized when the underlying tax position is considered more-likely-than-not to be sustained on examination by a taxing authority, assuming they possess full knowledge of the position and facts. Interest and penalties related to uncertain tax positions are recognized in the provision of income taxes; however, the Company currently has no interest or penalties related to uncertain income tax benefits. Comprehensive Income (Loss) Comprehensive income (loss) is the change in equity of a business enterprise during a period from transactions and other events and circumstances from non-owner sources. Comprehensive income (loss) includes net income (loss) and the change in accumulated other comprehensive income (loss) for the period. Accumulated other comprehensive income (loss) consisted entirely of unrealized gains and losses on available-for-sale marketable securities at December 31, 2023 and 2022. Net Loss per Share Basic loss per common share is determined by dividing loss attributable to common stockholders by the weighted-average number of common shares outstanding during the period, without consideration of common stock equivalents. Diluted loss per share is computed by dividing the loss attributable to common stockholders by the weighted-average number of common share equivalents outstanding for the period. The treasury stock method is used to determine the dilutive effect of the Company's stock option grants. Recently Issued Accounting Pronouncements The Company qualifies as an emerging growth company (“EGC”) as defined under the Jumpstart Our Business Startups Act (the “JOBS Act”). Using exemptions provided under the JOBS Act provided to EGCs, the Company has elected to defer compliance with new or revised financial accounting standards until it is required to comply with such standards, which is generally consistent with required adoption dates of private companies. In December 2023, the FASB issued ASU No. 2023-09, Income Taxes (Topic 740): Improvements to Income Tax Disclosures, to improve the transparency of income tax disclosures by requiring consistent categories and greater disaggregation of information in the rate reconciliation and income taxes paid disaggregated by jurisdiction. The ASU also includes certain other amendments to improve the effectiveness of income tax disclosures. The amendments in ASU 2023-09 are effective for fiscal years beginning after December 15, 2024, with early adoption permitted for annual financial statements that have not yet been issued or made available for issuance. The Company is currently evaluating the impact ASU No. 2023-09 will have on its financial statements. The Company considers the applicability and impact of all ASUs issued by the FASB. All other ASUs issued subsequent to the filing of the Company’s Annual Report were assessed and determined to be either inapplicable or not expected to have a material impact on the Company’s financial position or results of operations. ​ ​

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