Note 7 - Income Taxes - Effective Income Tax Reconciliation (Details)	12 Months Ended
Dec. 31, 2019	Dec. 31, 2018
Federal statutory rate	21.00%	21.00%
State tax, net of income tax benefit	24.90%	2.40%
Effect of permanent differences	(6.50%)	13.90%
Stock compensation	(21.00%)
Change in valuation allowance	12.90%	(36.30%)
Total	31.30%	1.00%

Percentage of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

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Percentage of domestic federal statutory tax rate applicable to pretax income (loss).

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