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Income (Loss) Per Share - Schedule of Earnings Per Share, Basic and Diluted (Details) - USD ($) $ / shares in Units, $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2019 | Sep. 30, 2018 | Sep. 30, 2019 | Sep. 30, 2018
Earnings Per Share [Abstract] |  |  |  |
Income from continuing operations, net of taxes | $ 1,895 | $ 317 | $ 1,719 | $ 1,358
Net loss attributable to non-controlling interest | (29) | (35) | (90) | (102)
Income from continuing operations attributable to Perma-Fix Environmental Services, Inc. common stockholders | 1,924 | 352 | 1,809 | 1,460
Loss from discontinuing operations attributable to Perma-Fix Environmental Services, Inc. common stockholders | (156) | (131) | (424) | (495)
Net income attributable to Perma-Fix Environmental Services, Inc. common stockholders | $ 1,768 | $ 221 | $ 1,385 | $ 965
Basic income per share attributable to Perma-Fix Environmental Services, Inc. common stockholders | $ 0.15 | $ 0.02 | $ 0.12 | $ 0.08
Diluted income per share attributable to Perma-Fix Environmental Services, Inc. common stockholders | $ 0.15 | $ 0.02 | $ .11 | $ 0.08
Basic weighted average shares outstanding | 12,070,000 | 11,922,000 | 12,029,000 | 11,828,000
Add: dilutive effect of stock options | 47,000 | 105,000 | 29,000 | 81,000
Add: dilutive effect of stock warrant | 6,000 |  | 3,000 |
Diluted weighted average shares outstanding | 12,123,000 | 12,027,000 | 12,061,000 | 11,909,000
Potential shares excluded from above weighted average share calculations due to their anti-dilutive effect include: Stock options | 159,000 | 83,000 | 165,000 | 83,000

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