2. 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 giving effect to all potential dilutive common stock equivalents outstanding for the period. For purposes of the diluted net loss per share calculation, options to purchase common stock, common stock warrants and restricted stock units are considered to be common stock equivalents.

A reconciliation of the denominator used in the calculation of basic and diluted loss per share is as follows (in thousands, except per share amounts):

	Three Months Ended September 30,						Nine Months Ended September 30,
	2018			2017			2018			2017
Numerator:
Net loss	$	(11,472	)	$	(11,471	)	$	(35,878	)	$	(33,340	)
Denominator:
Total weighted average common shares outstanding—basic		34,895			29,535			33,934			29,120
Dilutive effect of share equivalents resulting from stock options, restricted stock units, common stock warrants and common stock subject to repurchase		—			—			—			—
Weighted average common shares outstanding-diluted		34,895			29,535			33,934			29,120
Net loss per common share, basic and diluted	$	(0.33	)	$	(0.39	)	$	(1.06	)	$	(1.14	)

For all periods presented, we incurred net losses and, therefore, the effect of our outstanding stock options, restricted stock units and common stock warrants was not included in the calculation of diluted loss per share as the effect would be anti-dilutive. The following table contains share totals with a potentially dilutive impact (in thousands):

	As of September 30,
	2018		2017
Options to purchase common stock		1,378		2,489
Common stock warrants		—		17
Restricted stock units		1,611		1,566
Total		2,989		4,072