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Note 16 - Income Taxes (Details Textual) - USD ($) $ in Thousands |  | 12 Months Ended
--- | --- | ---
Dec. 22, 2017 | Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent | 35.00% | 21.00% | 35.00% | 35.00%
Operating Loss Carryforwards, Total |  | $ 5,800 |  |
Unrecognized Tax Benefits, Ending Balance |  | 0 | $ 0 |
Income Tax Expense (Benefit), Total |  | 4,485 | 14,386 | $ 18,323
Accounting Standards Update 2016-09 [Member] |  |  |  |
Income Tax Expense (Benefit), Total |  | $ 1,500 | $ (400) |
Domestic Tax Authority [Member] |  |  |  |
Open Tax Year |  | 2015 2016 2017 |  |
Foreign Tax Authority [Member] | Ministry of Economic Affairs and Finance, Italy [Member] |  |  |  |
Open Tax Year |  | 2012 2013 2014 2015 2016 2017 |  |
State and Local Jurisdiction [Member] |  |  |  |
Open Tax Year |  | 2015 2016 2017 |  |

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