Net Loss Per Share (Tables)

9 Months Ended

Sep. 30, 2013

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 nine month periods presented because their effect would have been anti-dilutive (in thousands):

	2013		2012
Options to purchase common stock		1,874		1,605
Convertible preferred stock (as converted)		—		7,567
Convertible preferred stock warrants (as converted)		—		554
Common stock warrant		618		2