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Note 8 - Income Taxes - Net deferred tax liabilities comprised of the following balance sheet accounts (Details) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2014
Dec. 31, 2013
Note 8 - Income Taxes - Net Deferred Tax Liabilities Comprised Of Following Balance Sheet Accounts Details    
Current deferred tax assets $ 106us-gaap_DeferredTaxAssetsNetCurrent $ 91us-gaap_DeferredTaxAssetsNetCurrent
Current deferred tax liabilities 0us-gaap_DeferredTaxLiabilitiesCurrent (9)us-gaap_DeferredTaxLiabilitiesCurrent
Non-current deferred tax liabilities (4,462)us-gaap_DeferredTaxLiabilitiesNoncurrent (4,242)us-gaap_DeferredTaxLiabilitiesNoncurrent
Net deferred tax liabilities $ (4,356)us-gaap_DeferredTaxLiabilities $ (4,160)us-gaap_DeferredTaxLiabilities