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Note 10 - Income Taxes - Reconciliation of Unrecognized Tax Benefits (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Balance $ 909 $ 1,099
Additions for tax positions taken in the current period
Reductions for tax positions taken in the current period
Additions for tax positions taken in prior years
Reductions for tax positions taken in prior years
Decrease related to settlements with taxing authorities (190)
Decrease as a result of a lapse in statute of limitations
Balance $ 909 $ 909