Note 6 - Income Taxes	3 Months Ended
Note 6 - Income Taxes	Mar. 31, 2020
Notes to Financial Statements
Income Tax Disclosure [Text Block]	6. Income Taxes The Company’s consolidated income tax benefit (expense) was $0.0 million for the three months ended March 31, 2020 and 2019 . The Company has recorded a valuation allowance to reduce its net deferred tax asset to an amount that is more likely than not to be realized in future years. Accordingly, the tax provision expense that would have been recognized in the three months ended March 31, 2020 was offset by changes in the valuation allowance. During the three months ended March 31, 2020 , the Company had no material changes in uncertain tax positions.

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.