Net Loss Per Share (Tables)

6 Months Ended

Jun. 30, 2016

Earnings Per Share [Abstract]

Summary of Shares Underlying Outstanding Options and Warrants were Excluded from Computation of Basic and Diluted Net Loss Per Share

The following shares underlying outstanding options and warrants were excluded from the computation of basic and diluted net loss per share for the periods presented because their effect would have been anti-dilutive (in thousands):

	Three Months Ended June 30,		Six Months Ended June 30,
	2016	2015	2016	2015
Options to purchase common stock	4,736	4,039	4,623	4,039
Restricted stock units	117	15	100	15
Common stock warrants	516	572	544	572