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Note 8 - Income Taxes (Detail) - Deferred income taxes (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2012
Dec. 31, 2011
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)