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Note 2 - Income Per Share (Tables) | 3 Months Ended
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Mar. 31, 2015
Earnings Per Share [Abstract] |
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] |
(in thousands except per share data) |  | Three Months ended March 31, |
|  | 2015 |  |  | 2014 |
Numerator: |  |  |  |  |  |  |  |
Net income (loss) |  | $ | 10,227 |  |  | $ | (1,374 | )
Denominator: |  |  |  |  |  |  |  |
Denominator for basic earnings per share – weighted-average shares |  |  | 18,145 |  |  |  | 14,915 |
Effect of dilutive securities: |  |  |  |  |  |  |  |
Equivalent shares issuable upon conversion of unvested restricted stock |  |  | 147 |  |  |  | - |
Equivalent shares issuable upon conversion of unvested employee stock options |  |  | 15 |  |  |  | - |
Denominator for diluted earnings per share – adjusted weighted-average shares and assumed conversions |  |  | 18,307 |  |  |  | 14,915 |
Basic and diluted income (loss) per share: |  | $ | 0.56 |  |  | $ | (0.09 | )

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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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