Net Loss Per Share (Tables)

6 Months Ended

Jun. 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				Six Months Ended
	June 30,				June 30,
	2014		2013		2014		2013
Options to purchase common stock		3,337		1,796		3,337		1,796
Convertible preferred stock (as converted)		—		8,631		—		8,631
Convertible preferred stock warrants (as converted)		—		618		—		618
Common stock warrants		596		—		596		—