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Note 9 - Net 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		$	(3,906,142	)		$	(7,262,529	)		$	(6,853,562	)		$	(11,335,836	)
Denominator
Weighted average common shares outstanding used to compute net loss per share, basic and diluted			9,187,588				9,126,153				9,159,286				7,852,907
Net loss per share of common stock, basic and diluted:		$	(0.43	)		$	(0.80	)		$	(0.75	)		$	(1.44	)

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

		Three Months Ended June 30,								Six Months Ended June 30,
		2020				2019				2020				2019
Options to purchase common stock			5,993,823				2,546,295				5,151,103				1,669,709
Series B convertible preferred stock			182,520				195,448				186,568				326,493
Warrants to purchase common stock			1,070,028				1,070,028				1,070,028				2,213,396
			7,246,371				3,811,771				6,407,699				4,209,598

X

- Definition

Tabular disclosure of securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) in the future that were not included in the computation of diluted EPS because to do so would increase EPS amounts or decrease loss per share amounts for the period presented, by antidilutive securities.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 260
-SubTopic 10
-Section 50
-Paragraph 1
-Subparagraph (c)
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X

- Definition

Tabular disclosure of an entity's basic and diluted earnings per share calculations, including a reconciliation of numerators and denominators of the basic and diluted per-share computations for income from continuing operations.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 260
-SubTopic 10
-Section 50
-Paragraph 1
-Subparagraph (a)
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