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Net Income per Common Share | 12 Months Ended
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Dec. 31, 2017
Earnings Per Share [Abstract] |
Net Income per Common Share | Net Income per Common Share Net income per common share is computed based on the weighted average number of common shares outstanding during the period. Diluted net income per common share is computed similarly but includes the effect of the assumed exercise of dilutive stock options and restricted stock under the treasury stock method. The computation of basic and diluted net income per common share is as follows:
| December 31,
| 2017 |  | 2016 |  | 2015
Net income | $ | 5,459,000 |  |  | $ | 7,411,000 |  |  | $ | 12,050,000 |
Weighted average common shares outstanding — basic | 7,690,000 |  |  | 7,621,000 |  |  | 7,583,000 |
Effect of dilutive securities | 57,000 |  |  | 40,000 |  |  | 40,000 |
Weighted average common and potentially issuable common shares outstanding — diluted | 7,747,000 |  |  | 7,661,000 |  |  | 7,623,000 |
Basic net income per common share | $ | 0.71 |  |  | $ | 0.97 |  |  | $ | 1.59 |
Diluted net income per common share | $ | 0.70 |  |  | $ | 0.97 |  |  | $ | 1.58 |

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- Definition The entire disclosure for earnings per share. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -URI http://asc.fasb.org/topic&trid=2144383 + Details
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