Net Loss Per Share (Tables)

6 Months Ended

Jun. 30, 2019

Earnings Per Share [Abstract]

Summary of Basic and Diluted Loss Per Share

The following table presents the Company’s basic and diluted net loss per share (in thousands, except per share amounts): 

	Three Months Ended						Six Months Ended
	June 30,						June 30,
	2019			2018			2019			2018
Net loss	$	(8,805	)	$	(12,007	)	$	(12,269	)	$	(28,223	)
Weighted-average shares of common stock outstanding	59,715			57,844			59,430			57,635
Net loss per share – basic and diluted	$	(0.15	)	$	(0.21	)	$	(0.21	)	$	(0.49	)

Anti-Dilutive Shares Excluded from Calculation of Diluted Net Loss Per Share

At June 30, 2019 and 2018, the following potential shares were excluded from the computation of diluted net loss per share because their effect would have been anti-dilutive (in thousands):

	June 30,
	2019	2018
Options to purchase common stock, restricted stock units and performance-based restricted stock units	10,199	11,222
Shares issuable pursuant to employee stock purchase plan	103	93
Convertible notes	7,143	11,825
Common stock warrants	—	4,682
Total shares excluded from net loss per share	17,445	27,822