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Note 13 - Net Loss Per Share (Tables)

12 Months Ended

Dec. 31, 2018

Notes Tables

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

		Years ended December 31,
		2018				2017				2016
Numerator:
Net loss		$	(13,987	)		$	(12,308	)		$	(10,310	)
Denominator:
Weighted average shares used to compute net loss per share, basic and diluted			38,377,606				38,160,543				8,368,284
Net loss per share, basic and diluted		$	(0.36	)		$	(0.32	)		$	(1.23	)

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

		December 31,
		2018				2017				2016
Stock options to purchase common stock			5,477,364				4,213,100				3,491,937
Unvested restricted stock units			267,359				97,996				-
Common stock warrants			2,666,666				-				-
Total			8,411,389				4,311,096				3,491,937

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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-SubTopic 10
-Section 50
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- 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

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