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Note 14 - Income Taxes (Details Textual) - USD ($) | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Jun. 30, 2016 | Jun. 30, 2015 | Jun. 30, 2016 | Jun. 30, 2015 | Dec. 31, 2015
Domestic Tax Authority [Member] | Internal Revenue Service (IRS) [Member] | Earliest Tax Year [Member] |  |  |  |  |
Open Tax Year |  |  | 2012 |  |
Foreign Tax Authority [Member] | Ministry of Economic Affairs and Finance, Italy [Member] | Earliest Tax Year [Member] |  |  |  |  |
Open Tax Year |  |  | 2010 |  |
Income Tax Expense (Benefit) | $ 4,903,000 | $ 4,634,000 | $ 8,789,000 | $ 6,646,000 |
Effective Income Tax Rate Reconciliation, Percent | 36.30% | 37.00% | 36.20% | 37.00% |
Deferred Tax Assets, Valuation Allowance | $ 0 |  | $ 0 |  | $ 0

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