Note 8 - Provision for Income Taxes (Details Textual) $ in Millions	12 Months Ended
	Dec. 31, 2019 USD ($)
Operating Loss Carryforwards, Total	$ 63,000,000.0
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent	21.00%
Deferred Tax Assets, Operating Loss Carryforwards, Domestic	$ 13.4
Deferred Tax Assets, Operating Loss Carryforwards, State and Local	$ 5.7
Net Operating Loss Carryforward Expiration Term	20 years
Valuation Allowance Percentage	100.00%