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Note 2 - Income Per Share (Tables) | 9 Months Ended
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Sep. 30, 2018
Notes Tables |
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] |
(in thousands except per share data) |  | Three Months ended September 30, |  |  | Nine Months ended September 30, |
|  | 2018 |  |  | 2017 |  |  | 2018 |  |  | 2017 |
Numerator: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net income |  | $ | 11,614 |  |  | $ | 4,632 |  |  | $ | 26,002 |  |  | $ | 6,141 |
Denominator: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Denominator for basic earnings per share – weighted-average shares |  |  | 18,343 |  |  |  | 18,288 |  |  |  | 18,337 |  |  |  | 18,275 |
Effect of dilutive securities: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Equivalent shares issuable upon conversion of unvested restricted stock |  |  | 154 |  |  |  | 116 |  |  |  | 111 |  |  |  | 91 |
Denominator for diluted earnings per share – adjusted weighted-average shares and assumed conversions |  |  | 18,497 |  |  |  | 18,404 |  |  |  | 18,448 |  |  |  | 18,366 |
Basic income per share: |  | $ | 0.63 |  |  | $ | 0.25 |  |  | $ | 1.42 |  |  | $ | 0.34 |
Diluted income per share: |  | $ | 0.63 |  |  | $ | 0.25 |  |  | $ | 1.41 |  |  | $ | 0.33 |

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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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