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Fair Value Measurements | 12 Months Ended
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Dec. 31, 2023
Fair Value Disclosures [Abstract] |
Fair Value Measurements | Fair Value Measurements The Company’s only financial instrument measured at fair value on a recurring basis is its interest make-whole payment derivative liability on its 2025 Notes (see Note 5 – Debt). The fair value of that liability was zero as of both December 31, 2023 and 2022. The fair value of the interest make-whole payment derivative liability was determined using a Monte Carlo model with the following key assumptions:
| December 31, 2023 |  | December 31, 2022
Volatility | 77 | % |  | 50 | %
Stock price | $2.20 per share |  | $8.40 per share
Credit spread | 92.20 | % |  | 56.52 | %
Term | 1.34 years |  | 2.34 years
Dividend yield | — | % |  | — | %
Risk-free rate | 4.60 | % |  | 4.35 | %
The estimated fair value of the interest make-whole derivative liability at December 31, 2023 and December 31, 2022 was determined using assumptions which include an implied credit spread rate for notes with a similar term, the expected volatility and dividend yield of the Company’s common stock and the risk-free interest rate. During the years ended December 31, 2023 and 2022, there were no conversions of the 3.25% convertible senior notes due 2025 (the “2025 Notes”) into shares of the Company’s common stock. During the year ended December 31, 2023, there was no change in the fair value of the interest make-whole liability. For the year ended December 31, 2022, the Company recorded a $0.9 million gain as a result of the changes in fair value of the interest make-whole liability within other income (expense), net on the consolidated statement of operations. Other Financial Instruments The carrying values of the Company’s other financial assets and liabilities approximate their fair values because of their short-term nature, with the exception of the 2025 Notes. The 2025 Notes are carried at amortized cost, adjusted for changes in fair value of the embedded derivative.

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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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