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Note 2 - Income Per Share (Tables) | 9 Months Ended
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Sep. 30, 2016
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, |
|  | 2016 |  |  | 2015 |  |  | 2016 |  |  | 2015 |
Numerator: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net income |  | $ | 2,869 |  |  | $ | 7,627 |  |  | $ | 10,853 |  |  | $ | 28,855 |
Denominator: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Denominator for basic earnings per share – weighted-average shares |  |  | 18,194 |  |  |  | 18,119 |  |  |  | 18,177 |  |  |  | 18,175 |
Effect of dilutive securities: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Equivalent shares issuable upon conversion of unvested restricted stock |  |  | 93 |  |  |  | 200 |  |  |  | 81 |  |  |  | 166 |
Equivalent shares issuable upon conversion of unvested employee stock options |  |  | - |  |  |  | 1 |  |  |  | - |  |  |  | 5 |
Denominator for diluted earnings per share – adjusted weighted-average shares and assumed conversions |  |  | 18,287 |  |  |  | 18,320 |  |  |  | 18,258 |  |  |  | 18,346 |
Basic income per share: |  | $ | 0.16 |  |  | $ | 0.42 |  |  | $ | 0.60 |  |  | $ | 1.59 |
Diluted income per share: |  | $ | 0.16 |  |  | $ | 0.42 |  |  | $ | 0.59 |  |  | $ | 1.57 |

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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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