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Net Income (Loss) Per Share | 3 Months Ended
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Mar. 31, 2021
Earnings Per Share [Abstract] |
Net Income (Loss) Per Share | Note 3. Net Income (Loss) Per Share Basic net income (loss) per share is calculated by dividing net income (loss) by the weighted average shares of common stock outstanding for the period. Diluted net income (loss) per share is calculated by dividing net income (loss) by the weighted average shares of common stock outstanding for the period plus amounts representing the dilutive effect of securities that are convertible into common stock. The Company calculates diluted income (loss) per common share using the treasury stock method. The following table presents the computation of net income (loss) per share (in thousands except per share data):
|  | Three months ended March 31, |
|  | 2021 |  |  | 2020 |
Numerator: |  |  |  |  |  |
Net income (loss) |  | $ | 237 |  |  | $ | (1,202 | )
Denominator: |  |  |  |  |  |
Weighted average common shares outstanding - basic |  |  | 9,869 |  |  |  | 9,690 |
Plus dilutive effect of potential common shares |  |  | 970 |  |  |  | — |
Weighted average common shares outstanding - diluted |  |  | 10,839 |  |  |  | 9,690 |
Net income (loss) per share: |  |  |  |  |  |
Basic |  | $ | 0.02 |  |  | $ | (0.12 | )
Diluted |  | $ | 0.02 |  |  | $ | (0.12 | )
Diluted weighted average common shares outstanding for the three months ended March 31, 2021 includes 25,201 warrants and 945,032 options. Potentially dilutive securities (in common stock equivalent shares) not included in the calculation of diluted net income (loss) per share because to do so would be anti-dilutive are as follows (in thousands):
|  | Three months ended March 31, |
|  | 2021 |  |  | 2020 |
Stock options and restricted stock |  |  | 371 |  |  |  | 1,211 |
Warrants outstanding |  |  | — |  |  |  | 51 |
Total |  |  | 371 |  |  |  | 1,262 |

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