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Net Income (Loss) Per Share | 9 Months Ended
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Sep. 30, 2018
Earnings Per Share [Abstract] |
Net Income (Loss) Per Share | Note 3. Net Income (Loss) Per Share Basic net income (loss) per share is calculated by dividing net income (loss) by the weighted average shares of common stock outstanding for the period. Diluted net income (loss) per share is calculated by dividing net income (loss) by the weighted average shares of common stock outstanding for the period plus amounts representing the dilutive effect of securities that are convertible into common stock. The Company calculates diluted earnings per common share using the treasury stock method and the as-if-converted method, as applicable. The following table presents the computation of net income (loss) per share:
|  | Three Months Ended September 30, |  |  |  | Nine Months Ended September 30, |  |
|  | 2018 |  |  | 2017 |  |  |  | 2018 |  |  | 2017 |  |
Numerator: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net income (loss) |  | $ | 437,259 |  |  | $ | 234,353 |  |  |  | $ | (3,858,879 | ) |  | $ | 549,323 |  |
Denominator: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Weighted average common shares outstanding - basic |  |  | 9,566,118 |  |  |  | 9,545,235 |  |  |  |  | 9,495,278 |  |  |  | 9,475,708 |  |
Plus dilutive effect of potential common shares |  |  | 526,383 |  |  |  | 624,324 |  |  |  |  | — |  |  |  | 763,279 |  |
Weighted average common shares outstanding - diluted |  |  | 10,092,501 |  |  |  | 10,169,559 |  |  |  |  | 9,495,278 |  |  |  | 10,238,987 |  |
Net income (loss) per share: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Basic |  | $ | 0.05 |  |  | $ | 0.02 |  |  |  | $ | (0.41 | ) |  | $ | 0.06 |  |
Diluted |  | $ | 0.04 |  |  | $ | 0.02 |  |  |  | $ | (0.41 | ) |  | $ | 0.05 |  |
Diluted weighted average common shares outstanding for the three months ended September 30, 2018 and 2017, includes 526,383 and 624,324 options outstanding, respectively. Diluted weighted average common shares outstanding for the nine months ended September 30, 2017, includes 6,281 warrants and 756,998 options outstanding. Potentially dilutive securities not included in the calculation of diluted net income (loss) per share because to do so would be anti-dilutive are as follows:
|  | Three Months Ended September 30, |  |  |  | Nine Months Ended September 30, |  |
|  | 2018 |  |  | 2017 |  |  |  | 2018 |  |  | 2017 |  |
Employee stock options |  |  | 244,543 |  |  |  | 375,277 |  |  |  |  | 887,287 |  |  |  | 427,645 |  |
Warrants outstanding |  |  | 51,003 |  |  |  | 51,003 |  |  |  |  | 51,003 |  |  |  | — |  |
Total |  |  | 295,546 |  |  |  | 426,280 |  |  |  |  | 938,290 |  |  |  | 427,645 |  |

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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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