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Note 5 - Stock-based Compensation (Details) (USD $) In Millions, except Share data, unless otherwise specified | 6 Months Ended
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Jun. 30, 2013 | Jun. 30, 2012
Note 5 - Stock-based Compensation (Details) [Line Items] |  |
Share-based Compensation Arrangement by Share-based Payment Award Accelerated Compensation Cost (in Dollars) | $ 1.0 |
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Aggregate Intrinsic Value (in Dollars) | $ 1.9 |
Executive Officers [Member] |  |
Note 5 - Stock-based Compensation (Details) [Line Items] |  |
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period | 318,852 |
Non-Employee Directors [Member] |  |
Note 5 - Stock-based Compensation (Details) [Line Items] |  |
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period | 63,210 |
Incentive Plan 2007 [Member] |  |
Note 5 - Stock-based Compensation (Details) [Line Items] |  |
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period | 382,062 | 432,396
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross |  | 359,568
Restricted Stock [Member] |  |
Note 5 - Stock-based Compensation (Details) [Line Items] |  |
Share-based Compensation Arrangement by Share-based Payment Award, Accelerated Vesting, Number | 107,224 |
Employee Stock Option [Member] |  |
Note 5 - Stock-based Compensation (Details) [Line Items] |  |
Share-based Compensation Arrangement by Share-based Payment Award, Accelerated Vesting, Number | 63,616 |

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- Details
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- Definition Additional share-based compensation cost recognized as a result of an occurrence of an event that accelerates its recognition. + References No definition available. + Details
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- Definition Number of shares for which recognition of compensation cost was accelerated. + References No definition available. + Details
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- Definition The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2)(iii)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Gross number of share options (or share units) granted during the period. + References No definition available. + Details
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- Definition Amount by which the current fair value of the underlying stock exceeds the exercise price of fully vested and expected to vest options outstanding. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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