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Summary of Significant Accounting Policies | 9 Months Ended
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Sep. 30, 2024
Summary of Significant Accounting Policies |
Summary of Significant Accounting Policies | 2. Summary of Significant Accounting Policies Principles of Consolidation The accompanying condensed consolidated financial statements include the accounts of the Company and its wholly owned subsidiaries. All intercompany accounts and transactions are eliminated upon consolidation. Use of Estimates The presentation of condensed consolidated financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the condensed consolidated financial statements and the reported amounts of revenues and expenses during the reporting period. Actual results could differ from those estimates. Research and development incentive income and receivable The Company recognizes other income from Australian research and development incentives when there is reasonable assurance that the income will be received, the relevant expenditure has been incurred, and the consideration can be reliably measured. The research and development incentive is one of the key elements of the Australian government’s support for Australia’s innovation system and is supported by legislative law primarily in the form of the Australian Income Tax Assessment Act 1997, as long as eligibility criteria are met. Management has assessed the Company’s research and development activities and expenditures to determine which activities and expenditures are likely to be eligible under the research and development incentive regime described above. At each period end, management estimates the refundable tax offset available to the Company based on available information at the time. Under the program, a percentage of eligible research and development expenses incurred by the Company through its subsidiary in Australia are reimbursed. The percentage was 43.5% for the year ended December 31, 2023 and for the nine months ended September 30, 2024. The research and development incentive receivable represents an amount due in connection with the above program. The Company recorded a research and development incentive receivable of $780 and $771 as of September 30, 2024 and December 31, 2023, respectively, in the condensed consolidated balance sheets and other income (expense) from Australian research and development incentives of ($499) and $554, respectively, for the three months ended September 30, 2024 and 2023 and $1,124 for the nine months ended September 30, 2023, in the condensed consolidated statements of operations related to refundable research and development incentive program payments in Australia. The Company did not record Australian research and development income during the nine months ended September 30, 2024. The following table shows the change in the research and development incentive receivable from January 1, 2023 to September 30, 2024 (in thousands):
​ | ​ | ​ | ​
Balance at January 1, 2023 |  | $ | 2,099
Cash received for 2022 eligible expenses | ​ |  | (2,333)
Australian research and development incentive income | ​ |  | 1,101
Foreign currency translation | ​ |  | (96)
Balance at December 31, 2023 | ​ | $ | 771
Australian research and development incentive income | ​ | ​ | —
Foreign currency translation | ​ | ​ | 9
Balance at September 30, 2024 | ​ | $ | 780
​ Foreign Currency Translation The financial statements of the Company’s Australian subsidiary are measured using the local currency as the functional currency. The assets and liabilities of this subsidiary are translated into U.S. dollars at an exchange rate as of the consolidated balance sheet date. Equity is translated at historical exchange rates. Revenues and expenses are translated into U.S. dollars at average rates of exchange in effect during the period. The resulting cumulative translation adjustments have been recorded as a separate component of stockholders’ equity. Realized and unrealized foreign currency transaction gains and losses are included in the results of operations. Concentration of Credit Risk Financial instruments that potentially subject the Company to credit risk consist principally of cash and cash equivalents. All cash and cash equivalents are held in United States or Australian financial institutions and money market funds. At times, the Company may maintain cash balances in excess of the federally insured amount of $250 per depositor, per insured bank, for each account ownership category. Although the Company currently believes that the financial institutions with whom it does business will be able to fulfill their commitments to the Company, there is no assurance that those institutions will be able to continue to do so. The Company has not experienced any credit losses associated with its balances in such accounts for the year ended December 31, 2023 or for the nine months ended September 30, 2024. Deposits As of September 30, 2024 and December 31, 2023, there were $865 and $966, respectively, of deposits made by the Company with certain service providers that are to be applied to future payments due under the service agreements or returned to the Company if not utilized, which were recorded in the condensed consolidated balance sheets. Warrants The Company will recognize on a prospective basis the value of the effect of the down round feature in the warrants to purchase shares of common stock that were issued in a private placement in November 2017 (the “2017 Warrants”) and in the warrants that were issued in a private placement in March 2020 (the “March 2020 Coverage Warrants”) when it is triggered (i.e., when the exercise price is adjusted downward). This value is measured as the difference between (1) the financial instrument’s fair value (without the down round feature) using the pre-trigger exercise price and (2) the financial instrument’s fair value (with the down round feature) using the reduced exercise price. The value of the effect of the down round feature will be treated as a dividend and a reduction to income available to common stockholders in the basic earnings per share (“EPS”) calculation. In connection with the private placement of common stock and prefunded warrants completed in April 2024 (the “April 2024 Private Placement”), when the 2017 Warrants were repriced from $10.55 to $2.82 as a result of a down round, the Company recorded a dividend of $234 during the nine months ended September 30, 2024. The Company initially classified the warrants that were exercisable for shares for Series X Non-Voting Convertible Preferred Stock (the “January 2023 Series X Preferred Stock Warrants”) as a liability on its condensed consolidated balance sheet on January 17, 2023 and subsequently remeasured the warrant liability to fair value at each reporting date until the conversion of Series X Non-Voting Convertible Preferred Stock (the “Series X Preferred Stock”) into common stock, which occurred on June 21, 2023. Changes in the fair value of the warrant liability were recognized as gains (losses) in the Company’s condensed consolidated statement of operations. In June 2023, in connection with obtaining Stockholder Approval to convert shares of Series X Preferred Stock into shares of common stock (“Stockholder Approval”), the January 2023 Series X Preferred Stock Warrants were reclassified from liability to equity. Fair Value of Financial Instruments Certain assets and liabilities are carried at fair value under GAAP. Fair value is defined as the exchange price that would be received for an asset or paid to transfer a liability (an exit price) in the principal or most advantageous market for the asset or liability in an orderly transaction between market participants on the measurement date. Valuation techniques used to measure fair value must maximize the use of observable inputs and minimize the use of unobservable inputs. Financial assets and liabilities carried at fair value are to be classified and disclosed in one of the following three levels of the fair value hierarchy, of which the first two are considered observable and the last is considered unobservable:
| ● | Level 1—Quoted prices in active markets for identical assets or liabilities.
| ● | Level 2—Observable inputs (other than Level 1 quoted prices), such as quoted prices in active markets for similar assets or liabilities, quoted prices in markets that are not active for identical or similar assets or liabilities, or other inputs that are observable or can be corroborated by observable market data.
| ● | Level 3—Unobservable inputs that are supported by little or no market activity and that are significant to determining the fair value of the assets or liabilities, including pricing models, discounted cash flow methodologies and similar techniques.
A summary of the assets carried at fair value in accordance with the hierarchy defined above is as follows (in thousands): ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | Total |  | Level 1 |  | Level 2 |  | Level 3
September 30, 2024 | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Assets: | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Cash equivalents | ​ | $ | 25,018 | ​ | $ | 25,018 | ​ | $ | — | ​ | $ | —
Total assets | ​ | $ | 25,018 | ​ | $ | 25,018 | ​ | $ | — | ​ | $ | —
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
December 31, 2023 | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Assets: | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Cash equivalents | ​ | $ | 39,065 | ​ | $ | 39,065 | ​ | $ | — | ​ | $ | —
Total assets | ​ | $ | 39,065 | ​ | $ | 39,065 | ​ | $ | — | ​ | $ | —
​ Cash equivalents of $25,018 and $39,065 as of September 30, 2024 and December 31, 2023, respectively, consisted of overnight investments and money market funds which are classified within Level 1 of the fair value hierarchy because they are valued using quoted market prices in active markets. The carrying values of the research and development incentive receivable, accounts payable and accrued liabilities approximate their fair value due to the short-term nature of these assets and liabilities. Leases The Company accounts for leases in accordance with Accounting Standards Codification, or ASC, Topic 842, Leases. At the inception of an arrangement, the Company determines whether the arrangement is or contains a lease based on the unique facts and circumstances present. Most leases with a term greater than one year are recognized on the balance sheet as right-of-use assets, lease liabilities and, if applicable, long-term lease liabilities. The Company has elected not to recognize on the balance sheet leases with terms of one year or less. Operating lease liabilities and their corresponding right-of-use assets are recorded based on the present value of lease payments over the expected remaining lease term. The Company has determined that the rate implicit in the lease is not determinable and the Company does not have borrowings with similar terms and collateral. Therefore, the Company considered a variety of factors, including observable debt yields from comparable companies and the volatility in the debt market for securities with similar terms, in determining that 8% was reasonable to use as the incremental borrowing rate for purposes of the calculation of lease liabilities. In accordance with the guidance in Topic 842, components of a lease should be split into three categories: lease components (e.g., land, building, etc.), non-lease components (e.g., common area maintenance, maintenance, consumables, etc.), and non-components (e.g., property taxes, insurance, etc.). Then the fixed and in-substance fixed contract consideration (including any related to non-components) must be allocated based on fair values to the lease components and non-lease components. Although separation of lease and non-lease components is required, certain practical expedients are available. Entities may elect the practical expedient to not separate lease and non-lease components. Rather, they would account for each lease component and the related non-lease component together as a single component. The Company has elected to account for the lease and non-lease components of each of its operating leases as a single lease component and allocate all of the contract consideration to the lease component only. The lease component results in an operating right-of-use asset being recorded on the consolidated balance sheets and amortized such that lease expense is recorded on a straight line basis over the term of the lease. Net Loss per Share Basic net loss per share is computed using the weighted average number of common shares outstanding during the period. Diluted net loss per share is computed using the weighted average number of common shares outstanding during the period and, if dilutive, the weighted average number of potential shares of common stock, including the assumed exercise of stock options and warrants. Subsequent Events The Company considers events or transactions that occur after the balance sheet date but prior to the issuance of the financial statements to provide additional evidence for certain estimates or to identify matters that require additional disclosure. Subsequent events have been evaluated as required. Recently issued accounting pronouncements From time to time, new accounting pronouncements are issued by the Financial Accounting Standards Board (“FASB”) or other standard setting bodies that the Company adopts as of the specified effective date. In November 2023, the FASB issued ASU 2023-07, Segment Reporting (Topic 280): Improvements to Reportable Segment Disclosures. ASU 2023-07 will improve reportable segment disclosure requirements, primarily through enhanced disclosures about significant segment expenses on an interim and annual basis. The ASU is effective for fiscal years beginning after December 15, 2023, and interim periods after December 15, 2024, with early adoption permitted. The adoption of this standard is not expected to have a material impact on the Company’s financial statements at adoption date.

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