Note 8 - Loss Per Share (Tables)

3 Months Ended

Mar. 31, 2020

Notes Tables

Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]

	Three Months Ended March 31,
	2020			2019
Numerator:
Net loss attributable to common shareholders per common share: basic and diluted calculation	$	(4,529,317	)	$	(3,293,184	)
Denominator:
Weighted average common shares outstanding-basic (1)		4,886,328			1,573,152
Effect of diluted stock options, warrants and preferred stock (2)		-			-
Weighted average common shares outstanding-diluted		4,886,328			1,573,152
Loss per common share-basic and diluted	$	(0.93	)	$	(2.09	)

Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table Text Block]

	Three Months Ended March 31,
	2020		2019
Options		794,038		407,158
Warrants		5,663,594		595,113
Convertible debt		378,000		504,770
Preferred stock: series B		7,925		7,925
Preferred stock: series D		350,000		-
Preferred stock: series E		691,159		-