Note 7 - Income Taxes	9 Months Ended
Note 7 - Income Taxes	Sep. 30, 2020
Notes to Financial Statements
Income Tax Disclosure [Text Block]	Note 7. Income Taxes Deferred tax assets and liabilities are recorded based on the difference between financial reporting and tax basis of assets and liabilities, and are measured by the enacted tax rates and laws that are expected to be in effect when the differences are expected to reverse. Deferred tax assets are computed with the presumption that they will be realizable in future periods when taxable income is generated. Predicting the ability to realize these assets in future periods requires judgment by management. U.S. generally accepted accounting principles prescribe a recognition threshold and measurement attribute for a tax position taken or expected to be taken in a tax return. Income tax benefits that meet the “more likely than not” recognition threshold should be recognized. The Company has recognized a deferred tax asset of approximately $1.4 million and has recorded a valuation allowance of approximately $10.0 million against the other deferred tax assets. The Company reviews the assessment of the deferred tax asset and valuation allowance on an annual basis or more often when events indicate that a change to the valuation allowance may be warranted. At December 31, 2019 , the Company had available net operating loss carryforwards of approximately $48.2 million. Net operating loss carryforwards prior to 2017 are available to offset taxable income of future periods and begin to expire in 2021. Effective for tax years ending in 2018, net operating losses can be carried forward to future years indefinitely. Approximately $0.1 million of the total net operating loss carryforward is subject to an IRS Section 382 limitation from 1999. Management is not aware of any tax positions that would have a significant impact on the Company's financial position.

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.