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Note 8 - Income Taxes - Deferred Tax Assets and Liabilities (Details) - USD ($)
$ in Thousands
Dec. 31, 2019
Dec. 31, 2018
Property, plant and equipment $ 168
Net operating loss carryforwards 14,579 15,622
Tax credit carryforwards 1,907 1,817
Intangible assets 1,283 1,231
Accrued expenses, reserves and other 2,265 1,838
Total deferred tax assets 20,034 20,676
Valuation allowance for deferred tax assets (1,942) (1,942)
Net deferred tax assets 18,092 18,734
Other (25)
Property, plant and equipment 342
Intangible assets (5,087) (3,856)
Total deferred tax liabilities (5,429) (3,881)
Net deferred tax assets $ 12,663 $ 14,853