Note 9 - Net Loss Per Share

6 Months Ended

Jun. 30, 2021

Notes to Financial Statements

Earnings Per Share [Text Block]

(9) 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: 

	June 30,
	2021		2020
Stock options to purchase common stock		1,685,059		1,055,203
Unvested restricted stock units		5,468		78,323
Common stock warrants		2,424,724		2,435,807
Total		4,115,251		3,569,333