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Note 6 - Income Taxes (Details) (USD $) | 3 Months Ended |
--- | --- | ---
Mar. 31, 2014 | Mar. 31, 2013 | Dec. 31, 2013
Note 6 - Income Taxes (Details) [Line Items] |  |  |
Income Tax Expense Benefit Period Increase Decrease | $ 1,200,000 |  |
Income Tax Expense (Benefit) | 3,039,000 | 1,848,000 |
Effective Income Tax Rate Reconciliation, Percent | 32.70% | 28.09% |
Income Tax Credits and Adjustments | 0 |  |
Unrecognized Tax Benefits | 10,000,000 |  | 10,200,000
Unrecognized Tax Benefits that Would Impact Effective Tax Rate | 6,100,000 |  | 6,300,000
Unrecognized Tax Benefits In Long Term Liabilities | 2,700,000 |  |
Unrecognized Tax Benefits In Deferred Tax Assets | 7,800,000 |  |
Unrecognized Tax Benefits In Deferred Tax Asset Subject To Full Valuation Allowance | 3,900,000 |  |
Research Tax Credit Carryforward [Member] |  |  |
Note 6 - Income Taxes (Details) [Line Items] |  |  |
Income Tax Credits and Adjustments |  | $ 400,000 |

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