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Fair Value Measurements | 12 Months Ended
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Dec. 31, 2024
Fair Value Disclosures [Abstract] |
Fair Value Measurements | 3. Fair Value Measurements Fair value measurements are market-based measurements, not entity-specific measurements. Therefore, fair value measurements are determined based on the assumptions that market participants would use in pricing the asset or liability. The Company follows a three-level hierarchy to prioritize the inputs used in the valuation techniques to derive fair values. The basis for fair value measurements for each level within the hierarchy is described below: • Level 1: Quoted prices in active markets for identical assets or liabilities. • Level 2: Quoted prices for similar assets or liabilities in active markets; quoted prices for identical or similar instruments in markets that are not active; and model-derived valuations in which all significant inputs are observable in active markets. • Level 3: Valuations derived from valuation techniques in which one or more significant inputs are unobservable in active markets. The Company has investments in money market accounts, which are included in cash and cash equivalents on the balance sheets. Fair value inputs for these investments are considered Level 1 measurements within the fair value hierarchy since money market account fair values are known and observable through daily published floating net asset values. The following table summarizes the Company’s fair value hierarchy for its financial assets measured at fair value on a recurring basis as of December 31, 2024 and December 31, 2023, respectively (in thousands).
| Fair Value Measurements Using |
December 31, 2024 | Fair Value |  | Level 1 |  | Level 2 |  | Level 3 |
Cash equivalents |  |  |  |  |  |  |  |
Money market | $ | 74 |  | $ | 74 |  | $ | — |  | $ | — |
Total cash equivalents | $ | 74 |  | $ | 74 |  | $ | — |  | $ | — |
Investments |  |  |  |  |  |  |  |
Treasury bills |  | 2,062 |  |  | — |  |  | 2,062 |  |  | — |
Government agency bonds |  | 772 |  |  | 772 |  |  | — |  |  | — |
Money market |  | 696 |  |  | 696 |  |  | — |  |  | — |
Total investments | $ | 3,530 |  | $ | 1,468 |  | $ | 2,062 |  | $ | — |
| Fair Value Measurements Using |
December 31, 2023 | Fair Value |  | Level 1 |  | Level 2 |  | Level 3 |
Money market | $ | 5,449 |  | $ | 5,449 |  | $ | — |  | $ | — |
During the year ended December 31, 2024, the Company issued common stock warrants which were initially classified as liabilities under authoritative accounting standards, and reclassified in the equity section of the balance sheet upon modification in August 2024 (See Note 15, Stockholders’ Deficit - May 2024 Private Placement, for further details). These common stock warrants were valued using the Black Scholes model, with level 3 inputs such as expected volatility, risk-free interest rate, and expected term that are not observable in active markets. The table below summarizes key inputs used in the valuation of the liability classified warrants as of the issuance date and as of the date of amendment:
| As of issuance date | As of date of amendment |
Expected term | 1.1 - 5.0 years | 0.9 - 4.7 years |
Common stock market price | $2.01 - $2.27 |  | $1.45 |
Risk-free interest rate | 4.5% - 5.1% | 3.81% - 4.63% |
Expected volatility | 117.0% - 127.2% | 92.2% - 99.79% |
The table below provides a summary of the fair value of the Company’s warrant liability during year ended December 31, 2024 (in thousands). As of December 31, 2023, the fair value of liability classified warrants was immaterial, and the change in the fair value of liability classified warrants during the year ended December 31, 2023 was immaterial.
|  | Twelve Months Ended December 31, 2024 |
Warrant liability |  |  |
Beginning balance |  | $ | — |
Issuance of warrants |  |  | 10,854 |
Change in fair value of warrants |  |  | (5,654 | )
Reclassification to equity |  |  | (5,200 | )
Ending balance |  | $ | — |
Nonfinancial Assets and Liabilities The Company applies fair value techniques on a non-recurring basis, if and when necessary, associated with: (1) valuing potential impairment losses related to goodwill and intangible assets which are accounted for pursuant to the authoritative guidance for intangibles—goodwill and other; and (2) valuing potential impairment losses related to long-lived assets which are accounted for pursuant to the authoritative guidance for property, plant and equipment. There was no impairment related to long lived assets, intangible assets, or goodwill during the years ended December 31, 2024 or 2023.

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- Definition The entire disclosure of the fair value measurement of assets and liabilities, which includes financial instruments measured at fair value that are classified in shareholders' equity, which may be measured on a recurring or nonrecurring basis. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 820 -Name Accounting Standards Codification -Publisher FASB -URI https://asc.fasb.org/820/tableOfContent + Details
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