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Note 9 - Income Taxes - Net Deferred Tax Liabilities (Details) - USD ($)
$ in Thousands
Dec. 31, 2016
Dec. 31, 2015
Current Deferred Tax Assets $ 94 $ 92
Non-Current Deferred Tax Liabilities (5,538) (4,631)
Net Deferred Tax Liabilities $ (5,444) $ (4,539)