Note 10 - Income Taxes - Income Taxes - Components of Deferred Taxes (Details) - USD ($)	Dec. 31, 2019	Dec. 31, 2018
Deferred tax assets
Deferred tax liabilities	(187,664)	(187,664)
Net deferred tax liabilities	$ (187,664)	$ (187,664)

Amount of deferred tax liability attributable to taxable temporary differences.

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Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences and carryforwards.

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Amount, after deferred tax asset, of deferred tax liability attributable to taxable differences without jurisdictional netting.

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