Note 9 - Loss Per Share (Tables)

6 Months Ended

Jun. 30, 2020

Notes Tables

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

	Three Months Ended June 30,					Six Months Ended June 30,
	2020			2019		2020			2019
Numerator:
Net loss attributable to common shareholders per common share: basic and diluted calculation	$	(3,577,378	)	$	1,444,706	$	(8,106,695	)	$	(1,848,478	)
Denominator:
Weighted average common shares outstanding-basic (1)		9,838,152			2,960,937		7,362,240			2,274,754
Effect of diluted stock options, warrants, and preferred stock (2)					3,046,141
Weighted average common shares outstanding - diluted		9,838,152			6,007,078		7,362,240			2,274,754
Gain (loss) per common share-basic	$	(0.36	)	$	0.49	$	(1.10	)	$	(0.81	)
Gain (loss) per common share- diluted	$	(0.36	)	$	0.24	$	(1.10	)	$	(0.81	)

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

	Six months ended June 30,
	2020		2019
Options		818,117		729,975
Warrants		7,257,883		2,025,971
Convertible debt		574,367		130,307
Preferred stock: series B		79,246		79,246
Preferred stock: series D		-		350,004
Preferred stock: series E		-		1,484,634