Note 9 - Income Taxes (Policies)	6 Months Ended
	Jun. 30, 2019
Income Tax Disclosure [Abstract]
Income Tax, Policy	We are required to establish a valuation allowance against our deferred tax assets when it is more likely than not that all or some portion of our deferred tax assets will not be realized. At each balance sheet date, we assess our need for a valuation allowance and this assessment is based on all available evidence, both positive and negative. This requires management to exercise judgment and make assumptions regarding whether our deferred tax assets will be realized in future periods.