Loss Per Share

12 Months Ended

Dec. 31, 2018

Basic net loss per share is computed by dividing the net loss by the weighted average number of shares of common stock outstanding during the period. Diluted net loss per share is computed by dividing the net loss by the weighted average number of shares of common stock and dilutive potential shares of common stock outstanding during the period. Because we have reported a net loss for all periods presented, diluted net loss per share is the same as basic net loss per share for those periods as all potentially dilutive shares consisting of convertible preferred stock, convertible preferred stock warrants, convertible common stock warrants and common stock options were antidilutive in those periods.

The following potentially dilutive securities outstanding at the end of the periods presented have been excluded from the computations of diluted shares outstanding because such securities have an antidilutive impact due to losses reported:


	Year Ended December 31,
	2018	2017	2016
Convertible preferred stock outstanding	—	12,111,706	9,367,628
Convertible preferred stock warrants	—	423,784	394,587
Convertible common stock warrants	6,595	—	—
Common stock options outstanding	2,745,156	2,071,616	1,497,511
Total	2,751,751	14,607,106	11,259,726