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Stock Option Plans (Tables) | 12 Months Ended
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Dec. 31, 2024
Share-Based Payment Arrangement [Abstract] |
Stock Option Activity Under Stock Option Plan | Stock option activity under the Company's stock options plans for the years ending December 31, 2024 and 2023 were as follows:
(in thousands, except share and per share data) |  | Number of Shares |  |  | Weighted- Average Exercise Price |  |  | Weighted- Average Contractual Term (Years) |  |  | Aggregate Intrinsic Value |
Outstanding, December 31, 2022 |  |  | 69,391 |  |  | $ | 276.00 |  |  | 8.69 |  |  | $ | 3 |
Granted |  |  | 25,912 |  |  |  | 73.50 |  |  |  |  |  |  |
Exercised |  |  | - |  |  |  | - |  |  |  |  |  |  |
Cancelled |  |  | (48,714 | ) |  |  | 177.00 |  |  |  |  |  |  |
Outstanding, December 31, 2023 |  |  | 46,589 |  |  | $ | 268.50 |  |  | 7.64 |  |  | $ | — |
Granted |  |  | 13,289 |  |  |  | 10.84 |  |  |  |  |  |  |
Exercised |  |  | - |  |  |  | - |  |  |  |  |  |  |
Cancelled |  |  | (26,641 | ) |  |  | 283.09 |  |  |  |  |  |  |
Outstanding, December 31, 2024 |  |  | 33,237 |  |  | $ | 153.79 |  |  |  | 7.15 |  |  | $ | — |
Options exercisable, December 31, 2024 |  |  | 23,903 |  |  | $ | 224.53 |  |  |  | 7.41 |  |  | $ | — |
Options available for future grant, December 31, 2024 |  |  | 142,745 |  |  |  |  |  |  |  |  |  |
Assumptions for Volatility, Expected Life, Dividend Yield and Risk-Free Interest Rate | The assumptions for volatility, expected life, dividend yield and risk-free interest rate are presented in the table below:
|  | For the Year Ended December 31,
|  | 2024 |  | 2023
Risk-free interest rate |  | 3.70 – 4.09% |  | 3.51 – 4.01%
Expected life in years |  | 5.04-6.06 |  | 5.06 – 6.25
Expected volatility |  | 112.17 -170.50% |  | 89.69 – 112.12%
Expected dividend yield |  | —% |  | —%

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- Definition Tabular disclosure for stock option plans. Includes, but is not limited to, outstanding awards at beginning and end of year, grants, exercises, forfeitures, and weighted-average grant date fair value. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c)(1) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (d) -SubTopic 10 -Topic 718 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (e) -SubTopic 10 -Topic 718 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 + Details
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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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