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Note 9 - Income Taxes - Income Tax Expense (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Federal $ (70)
State 20
Foreign 300 13
Total current tax provision 300 (37)
Federal (1,717) 220
State 55
Foreign (7) (85)
Total deferred tax provision (benefit) (1,669) 135
Total income tax provision $ (1,369) $ 98