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Loss per Share | 3 Months Ended
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Mar. 31, 2023
Earnings Per Share [Abstract] |
Loss per Share | 6. Loss per Share Basic per share data is computed by dividing net income or loss applicable to common stockholders by the weighted average number of common shares outstanding during the period. Diluted per share data is computed by dividing net income or loss applicable to common stockholders by the weighted average number of common shares outstanding during the period increased to include, if dilutive, the number of additional common shares that would have been outstanding as calculated using the treasury stock method. Potential common shares were related to outstanding but unexercised options, multiple series of convertible preferred stock, and warrants for all periods presented. The following were excluded from the diluted loss per share calculation for the periods presented because their effect would be anti-dilutive:
| As of March 31, |
| 2023 |  |  | 2022 |
Outstanding stock options |  |  | 2,014,245 |  |  |  | 1,170,873 |
Preferred stock |  |  | 422,867 |  |  |  | 422,867 |
Outstanding warrants |  |  | 2,141,189 |  |  |  | 2,141,378 |
Total |  |  | 4,578,301 |  |  |  | 3,735,118 |

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