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Note 11 - Income Taxes - Deferred Tax Assets and Liabilities (Details) - USD ($)
$ in Thousands
Dec. 31, 2015
Dec. 31, 2014
Deferred tax liabilities:    
Property, Plant and Equipment $ 0 $ 0
Intangible Assets 4,631 4,462
Total deferred tax liabilities 4,631 4,462
Deferred tax assets:    
Property, Plant and Equipment 288 88
Net operating loss carryforwards 27,283 20,164
Tax credit carryforwards 1,596 1,455
Intangible assets 3,391 3,841
Accrued expenses, reserves and other 2,127 2,509
Total deferred tax assets 34,685 28,057
Valuation allowance (34,593) (27,951)
Net deferred tax assets 92 106
Net deferred tax liabilities $ 4,539 $ 4,356