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Common Stock Warrants | 12 Months Ended
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Dec. 31, 2022
Common Stock Options and Restricted Stock Units (RSUs) |
Common Stock Warrants | Note 9 - Common Stock Warrants The following table summarizes all stock warrant activity of the Company for the year ended December 31, 2022:
|  | Number of Warrants |  |  | Weighted Average Exercise Price |  |  | Weighted Average Contractual Term (Years) |
Balance outstanding at December 31, 2021 |  |  | 121,818 |  |  | $ | 110.80 |  |  |  | 0.58 |
Granted |  |  | - |  |  |  | - |  |  |  | - |
Exercised |  |  | - |  |  |  | - |  |  |  | - |
Forfeited |  |  | - |  |  |  | - |  |  |  | - |
Expired |  |  | (111,488 | ) |  |  | 118.86 |  |  |  | - |
Balance outstanding at December 31, 2022 |  |  | 10,330 |  |  | $ | 25.01 |  |  |  | 1.78 |
Exercisable at December 31, 2022 |  |  | 10,330 |  |  | $ | 25.01 |  |  |  | 1.78 |

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