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Note 7 - Income Taxes - Effective Income Tax Rate Reconciliation (Details)
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Federal statutory rate (21.00%) (21.00%)
State income taxes, net of Federal benefits (5.30%) (5.00%)
Rate changes (6.40%) (66.30%)
Change in fair value of liability classified warrants (1.60%) (17.30%)
Other, including non-deductible expenses 28.80% 53.90%
Valuation allowance 5.50% 55.70%
Total 0.00% 0.00%