Net Loss Per Share (Tables)

6 Months Ended

Jun. 30, 2017

Earnings Per Share [Abstract]

Basic and Diluted Net Loss Per Share

A reconciliation of the numerators and denominators used in computing net loss from continuing operations per share is as follows (in thousands, except per share amounts):

	Three Months Ended June 30,						Six Months Ended June 30,
	2017			2016			2017			2016
Numerator:
Net loss from continuing operations	$	(22,453	)	$	(18,246	)	$	(43,579	)	$	(28,467	)
Denominator:
Shares used in per share calculation	24,822			24,777			24,817			24,774
Net loss from continuing operations per share, basic and diluted	$	(0.90	)	$	(0.74	)	$	(1.76	)	$	(1.15	)

Schedule of Antidilutive Securities Excluded from Computation of Diluted Net Loss per Share

The following table presents the potential shares of common stock outstanding that were excluded from the computation of diluted net loss from continuing operations per share for the periods presented because including them would have been anti-dilutive (in thousands):

	Three Months Ended June 30,		Six Months Ended June 30,
	2017	2016	2017	2016
Shares subject to outstanding common stock options	4,020	3,237	3,756	3,036
Shares subject to outstanding restricted stock units	273	108	205	64
Shares subject to outstanding warrants to purchase common stock	1,975	1,975	1,975	1,975
Total	6,268	5,320	5,936	5,075