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Note 14 - Income Taxes (Details Textual) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2019
Sep. 30, 2018
Sep. 30, 2019
Sep. 30, 2018
Dec. 31, 2018
Income Tax Expense (Benefit), Total $ 3,331 $ 1,496 $ 7,817 $ 1,890  
Effective Income Tax Rate Reconciliation, Percent, Total 26.60% 16.40% 25.30% 14.70%  
Effective Income Tax Rate Reconciliation, Tax Expense (Benefit), Share-based Payment Arrangement, Amount $ 300   $ 400    
Deferred Tax Assets, Valuation Allowance, Total $ 0   $ 0   $ 0