Basic and Diluted Net Loss Per Share (Tables)

12 Months Ended

Dec. 31, 2017

Earnings Per Share [Abstract]

Computation of Company's Basic and Diluted Net Loss Per Share of Common Stock

The following table sets forth the computation of the Company’s basic and diluted net loss per share during the years ended December 31, 2017, 2016 and 2015 (in thousands, except per share data):

	Year Ended December 31,
	2017			2016			2015
Numerator
Net loss	$	(26,141	)	$	(29,309	)	$	(32,099	)
Denominator
Weighted-average common shares for basic and diluted net    loss per share		76,281			72,994			70,069
Basic and diluted net loss per share	$	(0.34	)	$	(0.40	)	$	(0.46	)

Potential Shares of Common Stock Excluded from Diluted Weighted-Average Common Shares Outstanding

The following table summarizes the potentially dilutive common shares that were excluded from diluted weighted-average common shares outstanding because including them would have had an anti-dilutive effect (in thousands):

	Year Ended December 31,
	2017		2016		2015
Shares of common stock subject to repurchase		—		—		2
Shares of common stock issuable under equity incentive plans    outstanding		10,806		11,726		11,475
Potential common shares excluded from diluted net loss per    share		10,806		11,726		11,477