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Note 7 - Earnings Per Share (Tables) | 9 Months Ended
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Sep. 30, 2017
Notes Tables |
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] |
|  | Three Months Ended September 30, |  |  | Nine Months Ended September 30, |
|  | 2017 |  |  | 2016 |  |  | 2017 |  |  | 2016 |
Net earnings used in the computation of basic and diluted earnings per share |  | $ | 4,962,000 |  |  | $ | 4,447,000 |  |  | $ | 13,138,000 |  |  | $ | 10,197,000 |
Weighted average shares outstanding - basic |  |  | 14,573,813 |  |  |  | 14,118,354 |  |  |  | 14,475,311 |  |  |  | 14,055,345 |
Common stock equivalents |  |  | 655,909 |  |  |  | 865,730 |  |  |  | 591,305 |  |  |  | 814,726 |
Weighted average shares outstanding - diluted |  |  | 15,229,722 |  |  |  | 14,984,084 |  |  |  | 15,066,616 |  |  |  | 14,870,071 |
Per Share Data: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Basic |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net earnings |  | $ | 0.34 |  |  | $ | 0.31 |  |  | $ | 0.91 |  |  | $ | 0.73 |
Diluted |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net earnings |  | $ | 0.33 |  |  | $ | 0.30 |  |  | $ | 0.87 |  |  | $ | 0.69 |

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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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