Net Loss Per Share (Tables)

3 Months Ended

Mar. 31, 2015

Earnings Per Share [Abstract]

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

The following 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 March 31,
	2015		2014
Options to purchase common stock		3,980		3,169
Common stock warrants		572		618