Note 10 - Income Taxes	9 Months Ended
Sep. 30, 2020
Notes to Financial Statements
Income Tax Disclosure [Text Block]	10. Income Taxes The Company did not record a provision or benefit for income taxes during the three and nine months ended September 30, 2020 and 2019. The Company continues to maintain a full valuation allowance against its net deferred tax assets. On March 27, 2020, the Coronavirus Aid, Relief, and Economic Security Act (CARES Act) was enacted in response to the COVID-19 pandemic. The Company does not expect the provisions of the legislation to have a significant impact on the effective tax rate, the results of operations or the financial position of the Company.

- Definition

The entire disclosure for income taxes. Disclosures may include net deferred tax liability or asset recognized in an enterprise's statement of financial position, net change during the year in the total valuation allowance, approximate tax effect of each type of temporary difference and carryforward that gives rise to a significant portion of deferred tax liabilities and deferred tax assets, utilization of a tax carryback, and tax uncertainties information.

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