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Note 5 - Earnings Per Share ("EPS") (Tables) | 12 Months Ended
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Dec. 31, 2017
Notes Tables |
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] |
|  | Years Ended December 31,
|  | 2017 |  | 2016 |  | 2015
Shares used in the calculation of basic earnings per share |  |  | 14,575 |  |  |  | 14,682 |  |  |  | 14,934 |
Effect of dilutive securities: |  |  |  |  |  |  |  |  |  |  |  |
Stock options, SAR's, RSA's and RSU's |  |  | 493 |  |  |  | 434 |  |  |  | 387 |
Diluted shares used in the calculation of earnings per share |  |  | 15,068 |  |  |  | 15,116 |  |  |  | 15,321 |

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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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