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Note 9 - Earnings (Loss) Per Share - Common Stock ("EPS") - Reconciliation of Numerator of Basic and Diluted EPS Calculations (Details) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Net loss	$ (1,655,465)	$ (1,789,329)	$ (3,847,456)	$ (3,145,516)
Convertible preferred stock dividends	(41,870)	(200,625)	(198,033)	(401,250)
Net loss available to common stockholders	$ (1,697,335)	$ (1,989,954)	$ (4,045,489)	$ (3,546,766)

X

- Definition

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

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