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Note 6 - Income Taxes	9 Months Ended
Note 6 - Income Taxes	Sep. 30, 2015
Notes to Financial Statements
Income Tax Disclosure [Text Block]	6. Income Taxes Deferred income tax assets and liabilities are recognized for temporary differences between financial statements and income tax carrying values using tax rates in effect for the years such differences are expected to reverse. Due to uncertainties surrounding our ability to generate future taxable income and consequently realize such deferred income tax assets, a full valuation allowance has been established. We continue to maintain a full valuation allowance against our deferred tax assets as of September 30, 2015. The impact of an uncertain income tax position on the income tax return must be recognized at the largest amount that is more likely than not to be sustained upon audit by the relevant tax authority. An uncertain income tax position will not be recognized if it has less than a 50% likelihood of being sustained. There have been no material changes in our unrecognized tax benefits since December 31, 2014 and, as such, disclosures included in our 2014 Annual Report on Form 10-K for the year ended December 31, 2014 continue to be relevant for the period ended September 30, 2015.