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Income (Loss) Per Share (Tables) | 6 Months Ended
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Jun. 30, 2018
Earnings Per Share [Abstract] |
Schedule of Earnings Per Share, Basic and Diluted | 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 |  |  | Six Months Ended |
|  | June 30, |  |  | June 30, |
|  | (Unaudited) |  |  | (Unaudited) |
(Amounts in Thousands, Except for Per Share Amounts) |  | 2018 |  |  | 2017 |  |  | 2018 |  |  | 2017 |
Net income (loss) attributable to Perma-Fix Environmental Services, Inc., common stockholders: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Income (loss) from continuing operations, net of taxes |  | $ | 788 |  |  | $ | (1,226 | ) |  | $ | 1,040 |  |  | $ | (1,901 | )
Net loss attributable to non-controlling interest |  |  | (28 | ) |  |  | (217 | ) |  |  | (68 | ) |  |  | (296 | )
Income (loss) from continuing operations attributable to Perma-Fix Environmental Services, Inc. common stockholders |  |  | 816 |  |  |  | (1,009 | ) |  |  | 1,108 |  |  |  | (1,605 | )
Loss from discontinuing operations attributable to Perma-Fix Environmental Services, Inc. common stockholders |  |  | (206 | ) |  |  | (160 | ) |  |  | (363 | ) |  |  | (291 | )
Net income (loss) attributable to Perma-Fix Environmental Services, Inc. common stockholders |  | $ | 610 |  |  | $ | (1,169 | ) |  | $ | 745 |  |  | $ | (1,896 | )
Basic income (loss) per share attributable to Perma-Fix Environmental Services, Inc. common stockholders |  | $ | .05 |  |  | $ | (.10 | ) |  | $ | .06 |  |  | $ | (.16 | )
Diluted income (loss) per share attributable to Perma-Fix Environmental Services, Inc. common stockholders |  | $ | .05 |  |  | $ | (.10 | ) |  | $ | .06 |  |  | $ | (.16 | )
Weighted average shares outstanding: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Basic weighted average shares outstanding |  |  | 11,813 |  |  |  | 11,698 |  |  |  | 11,780 |  |  |  | 11,690 |
Add: dilutive effect of stock options |  |  | 100 |  |  |  | — |  |  |  | 69 |  |  |  | — |
Diluted weighted average shares outstanding |  |  | 11,913 |  |  |  | 11,698 |  |  |  | 11,849 |  |  |  | 11,690 |
Potential shares excluded from above weighted average share calculations due to their anti-dilutive effect include: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Upon exercise of options |  |  | 100 |  |  |  | 205 |  |  |  | 100 |  |  |  | 205 |

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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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