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Income (Loss) Per Share | 3 Months Ended
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Mar. 31, 2020
Earnings Per Share [Abstract] |
Income (Loss) Per Share | 8. Income (Loss) Per Share Basic income (loss) income per share is calculated based on the weighted-average number of outstanding common shares during the applicable period. Diluted income (loss) per share is based on the weighted-average number of outstanding common shares plus the weighted-average number of potential outstanding common shares. In periods where they are anti-dilutive, such amounts are excluded from the calculations of dilutive earnings (loss) per shares. The following table reconciles the income (loss) and average share amounts used to compute both basic and diluted income (loss) per share:
|  | Three Months Ended |
|  | (Unaudited) |
|  | March 31, |
(Amounts in Thousands, Except for Per Share Amounts) |  | 2020 |  |  | 2019 |
Net income (loss) attributable to Perma-Fix Environmental Services, Inc., common stockholders: |  |  |  |  |  |  |  |
Income (loss) income from continuing operations, net of taxes |  | $ | 1,308 |  |  | $ | (550 | )
Net loss attributable to non-controlling interest |  |  | (26 | ) |  |  | (30 | )
Income (loss) from continuing operations attributable to Perma-Fix Environmental Services, Inc. common stockholders |  |  | 1,334 |  |  |  | (520 | )
Loss from discontinuing operations attributable to Perma-Fix Environmental Services, Inc. common stockholders |  |  | (114 | ) |  |  | (152 | )
Net income (loss) attributable to Perma-Fix Environmental Services, Inc. common stockholders |  | $ | 1,220 |  |  | $ | (672 | )
Basic income (loss) per share attributable to Perma-Fix Environmental Services, Inc. common stockholders |  | $ | .10 |  |  | $ | (.06 | )
Diluted income (loss) per share attributable to Perma-Fix Environmental Services, Inc. common stockholders |  | $ | .10 |  |  | $ | (.06 | )
Weighted average shares outstanding: |  |  |  |  |  |  |  |
Basic weighted average shares outstanding |  |  | 12,122 |  |  |  | 11,961 |
Add: dilutive effect of stock options |  |  | 201 |  |  |  | — |
Add: dilutive effect of warrants |  |  | 23 |  |  |  | — |
Diluted weighted average shares outstanding |  |  | 12,346 |  |  |  | 11,961 |
Potential shares excluded from above weighted average share calcualtions due to their anti-dilutive effect include: |  |  |  |  |  |  |  |
Stock options |  |  | 14 |  |  |  | 598 |
Warrant |  |  | — |  |  |  | — |

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