Note 7 - Loss Per Share (Tables)

9 Months Ended

Sep. 30, 2019

Notes Tables

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

	Three Months Ended September 30						Nine Months Ended September 30
	2019			2018			2019			2018
Numerator:
Net loss attributable to common shareholders per common share: basic and diluted calculation	$	(4,134,313	)	$	(2,506,869	)	$	(5,982,791	)	$	(6,640,301	)
Denominator:
Weighted average common shares outstanding-basic		3,146,609			1,325,261			2,581,014			1,217,829
Effect of diluted stock options, warrants and preferred stock (1)		-			-			-			-
Weighted average common shares outstanding-diluted		3,146,609			1,325,261			2,581,014			1,217,829
Loss per common share-basic and diluted	$	(1.31	)	$	(1.89	)	$	(2.32	)	$	(5.45	)

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

	Three and Nine Months Ended September 30
	2019		2018
Options		713,564		344,889
Warrants		2,108,277		331,927
Convertible debt		103,734		504,770
Preferred stock: series B		7,925		7,925
Preferred stock: series D		350,000		-
Preferred stock: series E		461,503		-