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Note 8 - Employee Benefit Plan (Details) - Fair Value Measurements (USD $) In Thousands, unless otherwise specified | Dec. 31, 2013 | Dec. 31, 2012
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Note 8 - Employee Benefit Plan (Details) - Fair Value Measurements [Line Items] |  |  |  |
Fair value of plan assets at end of year | $ 16,605 |  | $ 14,325 |
Cash [Member] | Fair Value, Inputs, Level 1 [Member] |  |  |  |
Note 8 - Employee Benefit Plan (Details) - Fair Value Measurements [Line Items] |  |  |  |
Fair value of plan assets at end of year | 1,319 |  | 462 |
Cash [Member] |  |  |  |
Note 8 - Employee Benefit Plan (Details) - Fair Value Measurements [Line Items] |  |  |  |
Fair value of plan assets at end of year | 1,319 |  | 462 |
Equity Securities US Companies [Member] | Fair Value, Inputs, Level 1 [Member] |  |  |  |
Note 8 - Employee Benefit Plan (Details) - Fair Value Measurements [Line Items] |  |  |  |
Fair value of plan assets at end of year | 8,091 |  | 6,470 |
Equity Securities US Companies [Member] |  |  |  |
Note 8 - Employee Benefit Plan (Details) - Fair Value Measurements [Line Items] |  |  |  |
Fair value of plan assets at end of year | 8,091 |  | 6,470 |
Equity Securities International Companies [Member] | Fair Value, Inputs, Level 1 [Member] |  |  |  |
Note 8 - Employee Benefit Plan (Details) - Fair Value Measurements [Line Items] |  |  |  |
Fair value of plan assets at end of year | 137 |  | 112 |
Equity Securities International Companies [Member] |  |  |  |
Note 8 - Employee Benefit Plan (Details) - Fair Value Measurements [Line Items] |  |  |  |
Fair value of plan assets at end of year | 137 |  | 112 |
Equity Mutual Funds [Member] | Fair Value, Inputs, Level 1 [Member] |  |  |  |
Note 8 - Employee Benefit Plan (Details) - Fair Value Measurements [Line Items] |  |  |  |
Fair value of plan assets at end of year | 2,490 | [1] | 1,411 | [1]
Equity Mutual Funds [Member] | Fair Value, Inputs, Level 2 [Member] |  |  |  |
Note 8 - Employee Benefit Plan (Details) - Fair Value Measurements [Line Items] |  |  |  |
Fair value of plan assets at end of year |  | [1] |  | [1]
Equity Mutual Funds [Member] | Fair Value, Inputs, Level 3 [Member] |  |  |  |
Note 8 - Employee Benefit Plan (Details) - Fair Value Measurements [Line Items] |  |  |  |
Fair value of plan assets at end of year |  | [1] |  | [1]
Equity Mutual Funds [Member] |  |  |  |
Note 8 - Employee Benefit Plan (Details) - Fair Value Measurements [Line Items] |  |  |  |
Fair value of plan assets at end of year | 2,490 | [1] | 1,411 | [1]
US Government Corporations and Agencies Securities [Member] | Fair Value, Inputs, Level 2 [Member] |  |  |  |
Note 8 - Employee Benefit Plan (Details) - Fair Value Measurements [Line Items] |  |  |  |
Fair value of plan assets at end of year | 358 |  | 366 |
US Government Corporations and Agencies Securities [Member] |  |  |  |
Note 8 - Employee Benefit Plan (Details) - Fair Value Measurements [Line Items] |  |  |  |
Fair value of plan assets at end of year | 358 |  | 366 |
US States and Political Subdivisions Debt Securities [Member] | Fair Value, Inputs, Level 2 [Member] |  |  |  |
Note 8 - Employee Benefit Plan (Details) - Fair Value Measurements [Line Items] |  |  |  |
Fair value of plan assets at end of year | 398 |  | 435 |
US States and Political Subdivisions Debt Securities [Member] |  |  |  |
Note 8 - Employee Benefit Plan (Details) - Fair Value Measurements [Line Items] |  |  |  |
Fair value of plan assets at end of year | 398 |  | 435 |
Corporate Bonds-Investment Grade [Member] | Fair Value, Inputs, Level 1 [Member] |  |  |  |
Note 8 - Employee Benefit Plan (Details) - Fair Value Measurements [Line Items] |  |  |  |
Fair value of plan assets at end of year |  | [2] |  | [2]
Corporate Bonds-Investment Grade [Member] | Fair Value, Inputs, Level 2 [Member] |  |  |  |
Note 8 - Employee Benefit Plan (Details) - Fair Value Measurements [Line Items] |  |  |  |
Fair value of plan assets at end of year | 3,812 | [2] | 4,956 | [2]
Corporate Bonds-Investment Grade [Member] | Fair Value, Inputs, Level 3 [Member] |  |  |  |
Note 8 - Employee Benefit Plan (Details) - Fair Value Measurements [Line Items] |  |  |  |
Fair value of plan assets at end of year |  | [2] |  | [2]
Corporate Bonds-Investment Grade [Member] |  |  |  |
Note 8 - Employee Benefit Plan (Details) - Fair Value Measurements [Line Items] |  |  |  |
Fair value of plan assets at end of year | 3,812 | [2] | 4,956 | [2]
Corporate Bonds-Below Investment Grade [Member] | Fair Value, Inputs, Level 1 [Member] |  |  |  |
Note 8 - Employee Benefit Plan (Details) - Fair Value Measurements [Line Items] |  |  |  |
Fair value of plan assets at end of year |  |  |  | [3]
Corporate Bonds-Below Investment Grade [Member] | Fair Value, Inputs, Level 2 [Member] |  |  |  |
Note 8 - Employee Benefit Plan (Details) - Fair Value Measurements [Line Items] |  |  |  |
Fair value of plan assets at end of year |  |  | 113 | [3]
Corporate Bonds-Below Investment Grade [Member] | Fair Value, Inputs, Level 3 [Member] |  |  |  |
Note 8 - Employee Benefit Plan (Details) - Fair Value Measurements [Line Items] |  |  |  |
Fair value of plan assets at end of year |  |  |  | [3]
Corporate Bonds-Below Investment Grade [Member] |  |  |  |
Note 8 - Employee Benefit Plan (Details) - Fair Value Measurements [Line Items] |  |  |  |
Fair value of plan assets at end of year |  |  | 113 | [3]
Fair Value, Inputs, Level 1 [Member] |  |  |  |
Note 8 - Employee Benefit Plan (Details) - Fair Value Measurements [Line Items] |  |  |  |
Fair value of plan assets at end of year | 12,037 |  | 8,455 |
Fair Value, Inputs, Level 2 [Member] |  |  |  |
Note 8 - Employee Benefit Plan (Details) - Fair Value Measurements [Line Items] |  |  |  |
Fair value of plan assets at end of year | $ 4,568 |  | $ 5,870 |
[1] | This category comprises actively managed equity funds invested in large-cap and mid-cap U.S. companies.
[2] | This category represents investment grade bonds of U.S. issuers from diverse industries.
[3] | This category represents bonds from U.S. issuers from diverse industries that were purchased at investment grade, but which have fallen below investment grade.

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- Definition Assets, usually stocks, bonds, and other investments, that have been segregated and restricted (usually in a trust) to provide benefits, at their fair value as of the measurement date. Plan assets include amounts contributed by the employer (and by employees for a contributory plan) and amounts earned from investing the contributions, less benefits paid. If a plan has liabilities other than for benefits, those non-benefit obligations may be considered as reductions of plan assets. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=28361610&loc=d3e1928-114920 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 30 -Section 35 -Paragraph 50 -URI http://asc.fasb.org/extlink&oid=29635418&loc=d3e12355-114930 + Details
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