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Note 8 - Equity Plans (Details) - Stock Based Compensation Expense Recognized on Restricted Stock Units (USD $) | 3 Months Ended
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Mar. 31, 2014 | Mar. 31, 2013
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items] |  |
Impact per basic share | $ 0.25 | $ 0.47
Impact per diluted share | $ 0.25 | $ 0.47
Restricted Stock Units (RSUs) [Member] |  |
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items] |  |
RSU expense before taxes | $ 253 | $ 244
RSU expense after taxes | $ 157 | $ 159
Impact per basic share | $ 0.01 | $ 0.01
Impact per diluted share | $ 0.01 | $ 0.01

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- Definition Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5047-113901 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB TOPIC 14.F) -URI http://asc.fasb.org/extlink&oid=27013229&loc=d3e301413-122809 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(1)(i) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 14 -Section F + Details
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