Net loss per share

9 Months Ended

Sep. 30, 2015

Earnings Per Share [Abstract]

Net loss per share

11. Net loss per share

The following common stock equivalents were excluded from the calculation of diluted net loss per share for the periods indicated because including them would have had an anti-dilutive effect (in thousands):

	September 30,
		2015	2014
Warrants		—	338
Outstanding stock options		3,661	4,042
Unvested restricted stock		—	7
Restricted stock units		149	184
ESPP shares		3	2
Acquisition holdback		94	94
		3,907	4,667