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Note 8 - Income Taxes (Detail) - Deferred income taxes (USD $) In Thousands, unless otherwise specified | Dec. 31, 2012 | Dec. 31, 2011
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Deferred tax liabilities: |  |
Property, plant and equipment | $ 450 | $ 763
Intangible assets and other | 4,272 | 4,437
Total deferred tax liabilities | 4,722 | 5,200
Deferred tax assets: |  |
Net operating loss carryforwards | 18,505 | 17,578
Intangible assets | 4,664 | 5,079
Accrued expenses, reserves and other | 3,764 | 4,531
Investments |  | 342
Total deferred tax assets | 26,933 | 27,530
Valuation allowance for deferred tax assets | (26,251) | (26,526)
Net deferred tax assets | 682 | 1,004
Net deferred tax liability | $ (4,040) | $ (4,196)

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