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Net Income per Common Share (Tables) | 3 Months Ended
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Mar. 31, 2019
Earnings Per Share [Abstract] |
Computation of basic and diluted net income per common share: | The computation of basic and diluted net income (loss) per common share is as follows:
| Three Months Ended
| March 31,
| 2019 |  | 2018
Net income (loss) | $ | (3,845,000 | ) |  | $ | 518,000 |
Weighted average common shares outstanding — basic | 7,779,000 |  |  | 7,711,000 |
Effect of dilutive securities | — |  |  | 89,000 |
Weighted average common and potentially issuable common shares outstanding — diluted | 7,779,000 |  |  | 7,800,000 |
Basic net income (loss) per common share | $ | (0.49 | ) |  | $ | 0.07 |
Diluted net income (loss) per common share | $ | (0.49 | ) |  | $ | 0.07 |

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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://fasb.org/us-gaap/role/ref/legacyRef -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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