Note 10 - Net Loss Per Share

9 Months Ended

12 Months Ended

Sep. 30, 2019

Dec. 31, 2018

Notes to Financial Statements

Earnings Per Share [Text Block]

(

10

)  

Net Loss per Share

Basic net loss per share is computed by dividing net loss by the weighted-average number of common shares outstanding for the period. Diluted net loss per share is computed by dividing the net loss by the weighted-average number of common share equivalents outstanding for the period determined using the treasury-stock method. For all periods presented, there is

no

difference in the number of shares used to calculate basic and diluted shares outstanding since the effects of potentially dilutive securities are antidilutive due to its net loss position.  

The following outstanding common stock equivalents were excluded from the computation of diluted net loss per share for the periods presented because including them would have been antidilutive:

	September 30,
	2019		2018
Stock options to purchase common stock		848,148		616,567
Unvested restricted stock units		62,135		29,706
Common stock warrants		2,435,808		-
Total		3,346,091		646,273

( 13 ) Net Loss per Share

The following table sets forth the computation of the basic and diluted net loss per share for the years ended

December 31, 2018,

2017

and

2016

(in thousands, except share and per share data):

	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	)

The following weighted-average outstanding common stock equivalents were excluded from the computation of diluted net loss per share for the periods presented because including them would have been antidilutive:

	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