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(Loss) Income Per Share | 3 Months Ended
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Mar. 31, 2019
Earnings Per Share [Abstract] |
(Loss) Income Per Share | 7. (Loss) Income Per Share Basic (loss) income per share is calculated based on the weighted-average number of outstanding common shares during the applicable period. Diluted (loss) income 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 per shares. The following table reconciles the (loss) income and average share amounts used to compute both basic and diluted (loss) income per share:
|  | Three Months Ended |
|  | (Unaudited) |
|  | March 31, |
(Amounts in Thousands, Except for Per Share Amounts) |  | 2019 |  |  | 2018 |
Net (loss) income attributable to Perma-Fix Environmental Services, Inc., common stockholders: |  |  |  |  |  |  |  |
(Loss) income from continuing operations, net of taxes |  | $ | (550 | ) |  | $ | 253 |
Net loss attributable to non-controlling interest |  |  | (30 | ) |  |  | (40 | )
(Loss) income from continuing operations attributable to Perma-Fix Environmental Services, Inc. common stockholders |  |  | (520 | ) |  |  | 293 |
Loss from discontinuing operations attributable to Perma-Fix Environmental Services, Inc. common stockholders |  |  | (152 | ) |  |  | (157 | )
Net (loss) income attributable to Perma-Fix Environmental Services, Inc. common stockholders |  | $ | (672 | ) |  | $ | 136 |
Basic (loss) income per share attributable to Perma-Fix Environmental Services, Inc. common stockholders |  | $ | (.06 | ) |  | $ | .01 |
Diluted (loss) income per share attributable to Perma-Fix Environmental Services, Inc. common stockholders |  | $ | (.06 | ) |  | $ | .01 |
Weighted average shares outstanding: |  |  |  |  |  |  |  |
Basic weighted average shares outstanding |  |  | 11,961 |  |  |  | 11,747 |
Add: dilutive effect of stock options |  |  | — |  |  |  | 26 |
Diluted weighted average shares outstanding |  |  | 11,961 |  |  |  | 11,773 |
Potential shares excluded from above weighted average share calcualtions due to their anti-dilutive effect include: |  |  |  |  |  |  |  |
Stock options |  |  | 598 |  |  |  | 168 |

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- Definition The entire disclosure for earnings per share. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -URI http://asc.fasb.org/topic&trid=2144383 + Details
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