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Standby Equity Purchase Agreement | 3 Months Ended
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Mar. 31, 2025
Derivative Instruments and Hedging Activities Disclosure [Abstract] |
Standby Equity Purchase Agreement | Contingent Earnout Liability In connection with the execution of the Merger Agreement (see Note (3) Business Combination), MTAC entered into the Sponsor Support Agreement. Pursuant to the Sponsor Support Agreement, the 3,125,000 Sponsor Earnout Shares became unvested and subject to potential forfeiture if certain triggering events are not achieved prior to the 5 th anniversary of the Closing Date. Pursuant to the Sponsor Support Agreement, (i) 25% of the shares of the unvested Common Stock held by the Sponsor Holders will only vest if, during the five year period following the Closing, the volume weighted average price of our Common Stock equals or exceeds $15.00 for any 20 trading days within a period of 30 consecutive trading days, (ii) 25% of the shares of the unvested Common Stock held by the Sponsor Holders will only vest if, during the five year period following the Closing, the volume weighted average price of our Common Stock equals or exceeds $20.00 for any 20 trading days within a period of 30 consecutive trading days, (iii) 25% of the shares of the unvested Common Stock held by the Sponsor Holders will only vest if, during the five year period following the Closing, the volume weighted average price of our Common Stock equals or exceeds $25.00 for any 20 trading days within a period of 30 consecutive trading days; and (iv) 25% of the shares of the unvested Common Stock held by the Sponsor Holders will only vest if, during the five year period following the Closing, the volume weighted average price of our Common Stock equals or exceeds $30.00 for any 20 trading days within a period of 30 consecutive trading days. Additionally, the Sponsor Earnout Shares will vest if there is a change in control of our company on or before the 5 th anniversary of the Closing Date that results in the holders of our Common Stock receiving a price per share equal to or in excess of the applicable earnout targets. Any such shares held by the Sponsor Holders that remain unvested after the 5 th anniversary of the Closing will be forfeited. The estimated fair value of the contingent earnout liability on the Closing Date, August 10, 2023, was $28.9 million, based on a Monte Carlo simulation valuation model. The liability was remeasured to its fair value of $8.2 million and $7.4 million, respectively, as of March 31, 2025 and December 31, 2024, respectively. This remeasurement resulted in the recording of a loss of $0.8 million and $4.0 million, respectively, for the three ended March 31, 2025 and 2024, respectively, classified as change in fair value of contingent earnout liability in the Condensed Consolidated Statements of Operations. Assumptions used in the valuation are described below:
| March 31, 2025 |  | December 31, 2024
Current stock price | $ | 5.52 |  |  | $ | 5.01 |
Expected share price volatility | 70.0 | % |  | 70.0 | %
Risk-free interest rate | 3.9 | % |  | 4.3 | %
Expected term (years) | 3.36 |  | 3.61
Estimated dividend yield | — | % |  | — | %
The estimated fair value of the liability was determined using a Monte Carlo simulation valuation model using a distribution of potential outcomes. The inputs and assumptions utilized in the calculation require management to apply judgment and make estimates including: (a)expected volatility, which is based on the historical equity volatility of publicly traded peer companies for a term equal to the expected term of the earnout period; (b)expected term, which we based on the earnout period per the agreement; (c)risk-free interest rate, which was determined by reference to the U.S. Treasury yield curve for time periods commensurate with the expected term of the earnout period; and (d)expected dividend yield, which we estimate to be 0% based on the fact that we have never paid or declared dividends. These estimates may be subjective in nature and involve uncertainties and matters of judgment and therefore cannot be determined with exact precision. Standby Equity Purchase Agreement In October 2023, we entered into the SEPA with Yorkville. Yorkville is a fund managed by Yorkville Advisors Global, LP. Pursuant to the SEPA, we have the right, but not the obligation, to sell to Yorkville up to $30.0 million of Common Stock, par value $0.0001 per share, at our request any time during the commitment period commencing on October 2, 2023 (the “Effective Date”), and terminating on the first day of the month following the 24-month anniversary of the Effective Date. Each issuance and sale to Yorkville under the SEPA (an “Advance”) is subject to a maximum limit equal to the greater of: (i) an amount equal to 100% of the average of the daily volume of the Common Stock on the Nasdaq Stock Market (“Nasdaq”) for the 10 trading days immediately preceding an Advance notice, or (ii) 1,000,000 shares of Common Stock. At our election, the shares will be issued and sold to Yorkville at a per-share price equal to: (i) 96.0% of the Market Price (as defined below) for any period commencing on the receipt of the Advance notice by Yorkville and ending on 4:00 p.m. New York City time on the applicable Advance notice date (the “Option 1 Pricing Period”), or (ii) 97.0% of the Market Price for any three consecutive trading days commencing on the Advance notice date (the “Option 2 Pricing Period,” and each of the Option 1 Pricing Period and the Option 2 Pricing Period, a “Pricing Period”). “Market Price” is defined as, for any Option 1 Pricing Period, the daily volume-weighted average price (“VWAP”) of the Common Stock on Nasdaq, and for any Option 2 Pricing Period, the lowest VWAP of the Common Stock on the Nasdaq during the Option 2 Pricing Period. The Advances are subject to certain limitations, including that Yorkville cannot purchase any shares that would result in it beneficially owning more than 4.99% of the outstanding voting power or Common Stock. Further, Yorkville cannot purchase shares that would result in it acquiring more than 5,260,704 shares of Common Stock, which represents 19.99% of the outstanding Common Stock, as of the Effective Date of SEPA. As described in Note (2) Summary of Significant Accounting Policies, the SEPA is accounted for as a derivative and is recognized as a liability measured at fair value in accordance with ASC 820. We intend to utilize the SEPA to access capital to fund our operations. We did not issue any Advances during three months ended March 31, 2025. The estimated fair value of the SEPA liability on December 31, 2024, was $0.1 million, which was determined using a scenario-based valuation model. The liability was remeasured to its fair value of $0.02 million as of March 31, 2025, and is classified within other long-term liabilities in the Condensed Consolidated Balance Sheets. This remeasurement resulted in the recognition of a gain of $0.03 million for three months ended March 31, 2025, classified as change in fair value of SEPA, tranche and warrant liabilities in the Condensed Consolidated Statement of Operations. Assumptions used in the valuation are described below:
Valuation assumptions: | March 31, 2025 |  | December 31, 2024
Expected draws | $ | 3,000 |  | $ | 2,000
Expected probability of draws | 25% |  | 90 | %
Risk-free interest rate | 4.3 | % |  | 4.4 | %
The estimated fair value of the liability was determined using a scenario-based valuation model which assigned a probability to a number of different outcomes. The inputs and assumptions utilized in the calculation require management to apply judgment and make estimates including: (a)total expected draws of $3.0 million and $2.0 million, at March 31, 2025, and December 31, 2024, respectively, through the issuance of multiple separate advances under the Option 2 Pricing Period at March 31, 2025, and Option 1 Pricing Period at December 31, 2024; (b)the expected probability of the draws on the SEPA, which we estimate based on our expectation of the draws being completed; and (c)risk-free interest rate, which was determined by reference to the U.S. Treasury yield curve for time periods commensurate with the expected term of the agreement in relation to the date of the expected draw. These estimates may be subjective in nature and involve uncertainties and matters of judgment and therefore cannot be determined with exact precision.

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