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Note 2 - Income (Loss) Per Share | 9 Months Ended
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Sep. 30, 2020
Notes to Financial Statements |
Earnings Per Share [Text Block] | 2. Income (loss) per share Basic income (loss) per share is computed by dividing net income 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 nine months ended September 30, 2020 and 2019, basic and diluted income (loss) per share was as follows:
|  | Three Months Ended September 30, |  |  | Nine Months Ended September 30, |
|  | 2020 |  |  | 2019 |  |  | 2020 |  |  | 2019 |
Numerator: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net income (loss) |  | $ | 1,169 |  |  | $ | (4,463 | ) |  | $ | 2,029 |  |  | $ | (2,703 | )
Denominator: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Weighted average shares outstanding |  |  | 76,315,973 |  |  |  | 76,769,339 |  |  |  | 76,111,405 |  |  |  | 76,296,825 |
Weighted average restricted shares vested not delivered |  |  | 2,262,001 |  |  |  | 2,799,871 |  |  |  | 2,452,857 |  |  |  | 3,092,306 |
Total basic weighted average shares outstanding |  |  | 78,577,974 |  |  |  | 79,569,210 |  |  |  | 78,564,262 |  |  |  | 79,389,131 |
Dilutive effect of assumed conversion of restricted stock units |  |  | 594,604 |  |  |  | — |  |  |  | 650,357 |  |  |  | — |
Dilutive effect of assumed conversion of warrants |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |
Dilutive effect of assumed conversion of stock options |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |
Total diluted weighted average shares outstanding |  |  | 79,172,578 |  |  |  | 79,569,210 |  |  |  | 79,214,619 |  |  |  | 79,389,131 |
Basic and diluted income (loss) per share: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Basic |  | $ | 0.01 |  |  | $ | (0.06 | ) |  | $ | 0.03 |  |  | $ | (0.03 | )
Diluted |  | $ | 0.01 |  |  | $ | (0.06 | ) |  | $ | 0.03 |  |  | $ | (0.03 | )
The following potentially dilutive securities were excluded from the calculation of diluted income per share, as their effects would have been anti-dilutive for the periods presented:
|  | Three Months Ended September 30, |  |  | Nine Months Ended September 30, |
|  | 2020 |  |  | 2019 |  |  | 2020 |  |  | 2019 |
Restricted stock units |  |  | 1,589,498 |  |  |  | 3,794,227 |  |  |  | 1,639,561 |  |  |  | 3,794,227 |
Stock options |  |  | 2,509,000 |  |  |  | 2,120,000 |  |  |  | 2,509,000 |  |  |  | 2,120,000 |
Warrants |  |  | 833,333 |  |  |  | 2,398,776 |  |  |  | 833,333 |  |  |  | 2,398,776 |
Total anti-dilutive securities |  |  | 4,931,831 |  |  |  | 8,313,003 |  |  |  | 4,981,894 |  |  |  | 8,313,003 |

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