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(Loss) Income Per Share (Tables) | 3 Months Ended
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Mar. 31, 2019
Earnings Per Share [Abstract] |
Schedule of Earnings Per Share, Basic and Diluted | 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 Tabular disclosure of an entity's basic and diluted earnings per share calculations, including a reconciliation of numerators and denominators of the basic and diluted per-share computations for income from continuing operations. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 + Details
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