Net Loss Per Share (Tables)

9 Months Ended

Sep. 30, 2014

Earnings Per Share [Abstract]

Outstanding Options, Warrants and Preferred Stock Excluded from Computation of Basic and Diluted Net Loss Per Share

The following outstanding options, warrants and preferred stock 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 September 30,				Nine Months Ended September 30,
	2014		2013		2014		2013
Options to purchase common stock		3,317		1,874		3,317		1,874
Convertible preferred stock (as converted)		—		—		—		—
Convertible preferred stock warrants (as converted)		—		—		—		—
Common stock warrants		580		618		580		618