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Note 7 - Income Taxes - Net Deferred Tax Liabilities (Details) - USD ($)
$ in Thousands
Dec. 31, 2018
Dec. 31, 2017
Deferred Income Taxes, Net $ 15,444 $ 32
Deferred Tax Liabilities (591) (3,867)
Net Deferred Tax Assets (Liabilities) $ 14,853  
Net Deferred Tax Assets (Liabilities)   $ (3,835)