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Income (loss) per share | 6 Months Ended
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Jun. 30, 2019
Earnings Per Share [Abstract] |
Income (loss) per share | Income (loss) per share Basic income (loss) per share is computed by dividing net income (loss) by the weighted average number of common shares outstanding during the period, in addition to restricted stock units ("RSUs") and restricted common stock that are vested but not delivered. Diluted income (loss) per share reflects the potential dilution that could occur if securities or other contracts to issue common stock are exercised or converted into common stock, and is calculated using the treasury stock method for stock options, restricted stock units, restricted stock, warrants and deferred common stock. Common equivalent shares are excluded from the calculation in loss periods, as their effects would be anti-dilutive. For the three and six months ended June 30, 2019 and 2018, basic and diluted income (loss) per share was as follows:
|  | Three Months Ended June 30, |  | Six Months Ended June 30,
(In thousands, except share data) |  | 2019 |  | 2018 |  | 2019 |  | 2018
Numerator: |  |  |  |  |  |  |  |  |
Net income (loss) from continuing operations |  | $ | 715 |  |  | $ | 2,645 |  |  | $ | 1,760 |  |  | $ | (2,913 | )
Net loss from discontinued operations |  | — |  |  | — |  |  | — |  |  | (21,124 | )
Net income (loss) |  | $ | 715 |  |  | $ | 2,645 |  |  | $ | 1,760 |  |  | $ | (24,037 | )
Denominator: |  |  |  |  |  |  |  |  |  |
Weighted average shares outstanding |  | 76,487,160 |  |  | 75,282,042 |  |  | 76,056,652 |  |  | 71,318,930 |
Weighted average restricted shares vested not delivered |  | 2,901,223 |  |  | 2,914,917 |  |  | 3,240,947 |  |  | 3,566,816 |
Total basic weighted average shares outstanding |  | 79,388,383 |  |  | 78,196,959 |  |  | 79,297,599 |  |  | 74,885,746 |
Dilutive effect of assumed conversion of restricted stock units |  | 1,408,277 |  |  | — |  |  | 882,263 |  |  | — |
Dilutive effect of assumed conversion of warrants |  | 329,808 |  |  | — |  |  | 262,567 |  |  | — |
Dilutive effect of assumed conversion of stock options |  | 5,836 |  |  | — |  |  | 1,101 |  |  | — |
Total weighted average diluted shares outstanding |  | 81,132,304 |  |  | 78,196,959 |  |  | 80,443,530 |  |  | 74,885,746 |
Basic and diluted income (loss) per share: (1) |  |  |  |  |  |  |  |  |  |
Basic: |  |  |  |  |  |  |  |
Continuing operations |  | $ | 0.01 |  |  | $ | 0.03 |  |  | $ | 0.02 |  |  | $ | (0.04 | )
Discontinued operations |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | (0.28 | )
Net income (loss) |  | $ | 0.01 |  |  | $ | 0.03 |  |  | $ | 0.02 |  |  | $ | (0.32 | )
Diluted: |  |  |  |  |  |  |  |
Continuing operations |  | $ | 0.01 |  |  | $ | 0.03 |  |  | $ | 0.02 |  |  | $ | (0.04 | )
Discontinued operations |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | (0.28 | )
Net income (loss) |  | $ | 0.01 |  |  | $ | 0.03 |  |  | $ | 0.02 |  |  | $ | (0.32 | )
(1)Income (loss) per share tables may contain summation differences due to rounding. The following potentially dilutive securities were excluded from the calculation of diluted income (loss) per share, as their effects would have been anti-dilutive for the periods presented:
|  | Three Months Ended June 30, |  | Six Months Ended June 30,
|  | 2019 |  | 2018 |  | 2019 |  | 2018
Restricted stock units |  | 110,000 |  |  | 3,750,003 |  |  | 1,740,502 |  |  | 6,664,920 |
Stock options |  | 2,060,000 |  |  | 2,623,776 |  |  | 2,060,000 |  |  | 2,623,776 |
Warrants |  | 1,350,000 |  |  | 137,000 |  |  | 1,350,000 |  |  | 137,000 |
Total anti-dilutive securities |  | 3,520,000 |  |  | 6,510,779 |  |  | 5,150,502 |  |  | 9,425,696 |

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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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