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Net Income per Common Share (Tables) | 6 Months Ended
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Jun. 30, 2018
Earnings Per Share [Abstract] |
Computation of basic and diluted net income per common share: | The computation of basic and diluted net income per common share is as follows:
| Three Months Ended |  | Six Months Ended
| June 30, |  | June 30,
| 2018 |  | 2017 |  | 2018 |  | 2017
Net income | $ | 445,000 |  |  | $ | 2,162,000 |  |  | $ | 963,000 |  |  | $ | 3,848,000 |
Weighted average common shares outstanding — basic | 7,743,000 |  |  | 7,687,000 |  |  | 7,727,000 |  |  | 7,669,000 |
Effect of dilutive securities | 57,000 |  |  | 65,000 |  |  | 73,000 |  |  | 61,000 |
Weighted average common and potentially issuable common shares outstanding — diluted | 7,800,000 |  |  | 7,752,000 |  |  | 7,800,000 |  |  | 7,730,000 |
Basic net income per common share | $ | 0.06 |  |  | $ | 0.28 |  |  | $ | 0.12 |  |  | $ | 0.50 |
Diluted net income per common share | $ | 0.06 |  |  | $ | 0.28 |  |  | $ | 0.12 |  |  | $ | 0.50 |

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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/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 + Details
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