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Note 14 - Income Taxes (Details Textual) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2017
Mar. 31, 2016
Dec. 31, 2016
Income Tax Expense (Benefit) $ 2,571 $ 3,886  
Effective Income Tax Rate Reconciliation, Percent 31.90% 36.10%  
Excess Tax Benefits from Share-based Compensation $ 300    
Decrease in Effective Income Tax Rate due to Excess Tax Benefits from Share-based Compensation 4.00%    
Deferred Tax Assets, Valuation Allowance $ 0   $ 0
Domestic Tax Authority [Member] | Earliest Tax Year [Member] | Internal Revenue Service (IRS) [Member]      
Open Tax Year 2013    
Domestic Tax Authority [Member] | Latest Tax Year [Member] | Internal Revenue Service (IRS) [Member]      
Open Tax Year 2017    
Foreign Tax Authority [Member] | Earliest Tax Year [Member] | Ministry of Economic Affairs and Finance, Italy [Member]      
Open Tax Year 2011    
Foreign Tax Authority [Member] | Latest Tax Year [Member] | Ministry of Economic Affairs and Finance, Italy [Member]      
Open Tax Year 2017    
State and Local Jurisdiction [Member] | Earliest Tax Year [Member]      
Open Tax Year 2013    
State and Local Jurisdiction [Member] | Latest Tax Year [Member]      
Open Tax Year 2017