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Stock-Based Compensation (Tables) | 6 Months Ended
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Jun. 30, 2025
Stock-Based Compensation [Abstract] |
Schedulel of Fair Value of the Company’s Share-Based Payment Awards | The fair value of the Company’s share-based payment awards for the six months ended June 30, 2025 was estimated on the grant dates using the Black-Scholes model with the following assumptions:
|  | Six Months Ended June 30, 2025 |
Interest rate (risk-free rate) |  |  | 4.34 | %
Expected volatility |  |  | 119 | %
Expected term |  |  | 4.38 years |
Expected dividend |  |  | 0 | %
Fair value of option grants (in thousands) |  | $ | 832 |
Schedule of Shares Available for Grant Under the Plans and Options Outstanding | The following table summarizes the activity in the shares available for grant under the Plans during the three and six months ended June 30, 2025 and options outstanding as of June 30, 2025 (in thousands, except exercise price):
|  |  |  |  | Options Outstanding |
|  |  |  |  |  |  |  | Weighted |
|  | Shares |  |  |  |  |  | Average |
|  | Available |  |  | Number of |  |  | Exercise |
|  | for Grant |  |  | Shares |  |  | Prices |
Balance as of December 31, 2024 |  |  | 1,544 |  |  |  | 30 |  |  | $ | 130.14 |
Options granted |  |  | (1,325 | ) |  |  | 1,325 |  |  | $ | 0.78 |
RSUs granted |  |  | (2 | ) |  |  | — |  |  |  | — |
Balance as of March 31, 2025 |  |  | 217 |  |  |  | 1,355 |  |  | $ | 130.14 |
RSUs cancelled and returned to the 2019 Plan |  |  | 1 |  |  |  | — |  |  |  | — |
Options exercised |  |  | — |  |  |  | (5 | ) |  | $ | 0.78 |
Options cancelled and returned to the 2019 Plan |  |  | 95 |  |  |  | (95 | ) |  | $ | 0.78 |
Balance as of June 30, 2025 |  |  | 313 |  |  |  | 1,255 |  |  | $ | 3.54 |
Schedule of Significant Ranges of Outstanding and Exercisable Options | The following table summarizes significant ranges of outstanding and exercisable options as of June 30, 2025 (in thousands, except contractual life and exercise price):
|  | Options Outstanding |  |  | Options Exercisable |
|  |  |  |  | Weighted |  |  |  |  |  |  |  |  |  |  |  |  |
|  |  |  |  | Average |  |  |  |  |  |  |  |  |  |  |  |  |
|  |  |  |  | Remaining |  |  | Weighted |  |  |  |  |  | Weighted |  |  |  |
|  |  |  |  | Contractual |  |  | Average |  |  |  |  |  | Average |  |  | Aggregate |
|  | Number |  |  | Life |  |  | Exercise |  |  | Number |  |  | Exercise |  |  | Intrinsic |
Range of Exercise Price |  | Outstanding |  |  | (in Years) |  |  | Price |  |  | Exercisable |  |  | Price |  |  | value |
$0.00 - $1.00 |  |  | 1,225 |  |  |  | 9.53 |  |  | $ | 0.78 |  |  |  | 142 |  |  | $ | 0.78 |  |  | $ | 44 |
$1.01 - $62.80 |  |  | 2 |  |  |  | 4.39 |  |  | $ | 62.80 |  |  |  | 2 |  |  | $ | 62.80 |  |  |  | — |
$62.81 - $599.60 |  |  | 28 |  |  |  | 5.53 |  |  | $ | 110.13 |  |  |  | 27 |  |  | $ | 110.32 |  |  |  | — |
$0.00 - $599.60 |  |  | 1,255 |  |  |  | 9.43 |  |  | $ | 3.54 |  |  |  | 171 |  |  | $ | 53.22 |  |  | $ | 44 |
Schedule of RSU Activity Under Plans | A summary of RSU activity under the Plans is presented below (in thousands, except for fair value):
|  |  |  |  | Weighted |
|  |  |  |  | Average |
|  | Number of |  |  | Grant-Date |
|  | Shares |  |  | Fair Value |
Non-vested shares as of December 31, 2024 |  |  | 2 |  |  | $ | 37.69 |
Granted |  |  | 2 |  |  | $ | 1.00 |
Non-vested shares as of March 31, 2025 |  |  | 4 |  |  | $ | 18.88 |
Vested |  |  | (1 | ) |  | $ | 42.65 |
Non-vested shares as of June 30, 2025 |  |  | 3 |  |  | $ | 4.88 |

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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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