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Convertible Redeemable Preferred Stock and Stockholders' Equity (Deficit) (Tables) | 12 Months Ended
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Dec. 31, 2024
Stockholders' Equity Note [Abstract] |
Schedule of Valuation Assumptions for Stock Options | The fair values of options at the date of grant, or when assumed by the Company, were estimated using the Black-Scholes option pricing model utilizing the following assumptions:
|  | Year Ended December 31,
|  |  | 2022
Dividend yield (1) |  |  | 0.0%
Expected volatility (2) |  |  | 68.2% - 69.2%
Risk-free interest rate (3) |  |  | 3.2% - 4.2%
Expected life of options (in years) (4) |  |  | 6.18 - 6.25
(1) The Company has never declared or paid a cash dividend on its Common Stock and has no plans to pay cash dividends on Common Stock in the foreseeable future. (2) Volatility is a measure of the amount by which a financial variable such as a share price has fluctuated (historical volatility) or is expected to fluctuate (expected volatility) during a period. The Company considered the historical volatility of its stock price over a term similar to the expected life of the options in determining expected volatility. (3) The Company used rates on the grant date of zero-coupon government bonds with maturities over periods covering the term of the awards. (4) This is the period of time that the options granted are expected to remain outstanding. Options under the Company's plans generally have a contractual term of 10 years and generally must be exercised within 30 to 90 days following termination of service.
Schedule of Stock Options Activity | A summary of options granted, exercised, forfeited and expired during the years ended December 31, 2024, 2023 and 2022 is included below:
| Number of Shares |  | Weighted-Average Exercise Price
Options outstanding as of December 31, 2021 | 89,152 |  |  | $ | 89.00 |
Options granted | 47,400 |  |  | 50.00 |
Options exercised | (4,848) |  |  | 27.00 |
Options forfeited | (3,114) |  |  | 146.60 |
Options expired | (14,391) |  |  | 291.40 |
Options outstanding as of December 31, 2022 | 114,199 |  |  | $ | 48.40 |
Options exercised | (150) |  |  | 18.20 |
Options forfeited | (760) |  |  | 26.64 |
Options expired | (4,626) |  |  | 96.42 |
Options outstanding as of December 31, 2023 | 108,663 |  |  | $ | 46.56 |
Options exercised | (33) |  |  | 18.20 |
Options forfeited | (887) |  |  | 22.53 |
Options expired | (8,274) |  |  | 102.19 |
Options outstanding as of December 31, 2024 | 99,469 |  |  | $ | 42.15 |
Options exercisable as of December 31, 2024 | 75,269 |  |  | $ | 39.83 |
Schedule of Options Outstanding Range of Exercise Prices | The following table summarizes information about options outstanding, and exercisable, as of December 31, 2024:
|  | Options Outstanding |  | Options Exercisable
Range of Exercise Prices |  | Options Outstanding |  | Weighted Average Exercise Price |  | Weighted Average Remaining Contractual Life (Years) |  | Options Exercisable |  | Weighted Average Exercise Price |  | Weighted Average Remaining Contractual Life (Years)
$11.40 - $50.00 |  | 84,304 |  |  | $ | 38.14 |  |  | 6.04 |  | 60,104 |  |  | $ | 33.62 |  |  | 5.39
$64.20 - $87.20 |  | 15,165 |  |  | 64.45 |  |  | 4.87 |  | 15,165 |  |  | 64.45 |  |  | 4.87
|  | 99,469 |  |  | $ | 42.15 |  |  | 5.86 |  | 75,269 |  |  | $ | 39.83 |  |  | 5.28
Schedule of Unvested Stock Awards | A summary of the stock awards granted, vested and forfeited during the years ended December 31, 2024, 2023 and 2022 is presented as follows. RSU awards with undelivered shares are classified as unvested until the date of delivery of the shares.
|  | Restricted Stock Units |  | Weighted Average Grant-Date Fair Value
Unvested as of December 31, 2021 |  | 201,511 |  |  | $ | 75.20 |
Granted |  | 117,929 |  |  | 40.80 |
Vested |  | (74,656) |  |  | 80.20 |
Forfeited |  | (12,554) |  |  | 120.80 |
Unvested as of December 31, 2022 |  | 232,230 |  |  | $ | 53.80 |
Granted |  | 234,171 |  |  | 19.08 |
Vested |  | (152,422) |  |  | 23.11 |
Forfeited |  | (255) |  |  | 47.60 |
Unvested as of December 31, 2023 |  | 313,724 |  |  | $ | 42.38 |
Granted |  | 229,795 |  |  | 15.19 |
Vested |  | (140,901) |  |  | 20.68 |
Forfeited |  | (20,987) |  |  | 49.68 |
Unvested as of December 31, 2024 |  | 381,631 |  |  | $ | 33.62 |

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- Definition Tabular disclosure of the significant assumptions used during the year to estimate the fair value of stock options, including, but not limited to: (a) expected term of share options and similar instruments, (b) expected volatility of the entity's shares, (c) expected dividends, (d) risk-free rate(s), and (e) discount for post-vesting restrictions. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 718 -SubTopic 10 -Subparagraph (f)(2) -Name Accounting Standards Codification -Paragraph 2 -Section 50 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 + Details
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