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Note 9 - Income Taxes - Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Thousands | Dec. 31, 2017 | Dec. 31, 2016
--- | --- | ---
Deferred Tax Liabilities: |  |
Property, Plant and Equipment |  |
Other | 38 |
Intangible Assets | 3,806 | 5,471
Total Deferred Tax Liabilities | 3,844 | 5,471
Deferred Tax Assets: |  |
Property, Plant and Equipment | 44 | 77
Net Operating Loss Carryforwards | 17,870 | 27,127
Tax Credit Carryforwards | 1,837 | 1,704
Intangible Assets | 1,535 | 2,923
Accrued Expenses, Reserves and Other | 1,359 | 1,527
Total Deferred Tax Assets | 22,645 | 33,358
Valuation Allowance for Deferred Tax Assets | (22,636) | (33,331)
Net Deferred Tax Assets | 9 | 27
Net Deferred Tax Liabilities | $ 3,835 | $ 5,444

X
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