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Note 11 - Earnings Per Share ("EPS") - Reconciliation of Numerator of Basic and Diluted EPS Calculations (Details) - USD ($)	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Basic Numerator:
Net loss	$ (1,803,508)	$ (2,191,992)
Convertible preferred stock dividends		(156,162)
Net loss available to common stockholders (basic and diluted)	$ (1,803,508)	$ (2,348,154)

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The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

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Amount, after deduction of tax, noncontrolling interests, dividends on preferred stock and participating securities; of income (loss) available to common shareholders.

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