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(Loss) Income Per Share (Tables) | 3 Months Ended
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Mar. 31, 2021
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) |  | 2021 |  |  | 2020 |
Net (loss) income attributable to Perma-Fix Environmental Services, Inc., common stockholders: |  |  |  |  |  |  |  |
(Loss) income from continuing operations, net of taxes |  | $ | (1,038 | ) |  | $ | 1,308 |
Net loss attributable to non-controlling interest |  |  | (30 | ) |  |  | (26 | )
(Loss) income from continuing operations attributable to Perma-Fix Environmental Services, Inc. common stockholders |  |  | (1,008 | ) |  |  | 1,334 |
Loss from discontinuing operations attributable to Perma-Fix Environmental Services, Inc. common stockholders |  |  | (115 | ) |  |  | (114 | )
Net (loss) income attributable to Perma-Fix Environmental Services, Inc. common stockholders |  | $ | (1,123 | ) |  | $ | 1,220 |
Basic (loss) income per share attributable to Perma-Fix Environmental Services, Inc. common stockholders |  | $ | (.09 | ) |  | $ | .10 |
Diluted (loss) income per share attributable to Perma-Fix Environmental Services, Inc. common stockholders |  | $ | (.09 | ) |  | $ | .10 |
Weighted average shares outstanding: |  |  |  |  |  |  |  |
Basic weighted average shares outstanding |  |  | 12,165 |  |  |  | 12,122 |
Add: dilutive effect of stock options |  |  | — |  |  |  | 201 |
Add: dilutive effect of warrants |  |  | — |  |  |  | 23 |
Diluted weighted average shares outstanding |  |  | 12,165 |  |  |  | 12,346 |
Potential shares excluded from above weighted average share |  |  |  |  |  |  |  |
calculations due to their anti-dilutive effect include: |  |  |  |  |  |  |  |
Stock options |  |  | 30 |  |  |  | 14 |
Warrant |  |  | — |  |  |  | — |

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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://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=124432515&loc=d3e3550-109257 + Details
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