Common Stock and Stockholders' Deficit (Tables)

9 Months Ended

Sep. 30, 2013

Shares of Common Stock Authorized and Reserved for Future Issuance

At September 30, 2013, we have shares of common stock authorized and reserved for future issuance as follows:

Options to purchase common stock	9,488,881
Options available for future issuance	1,411,490
Convertible preferred Series A stock warrants	411,288
Common stock warrants	138,299
Total common stock authorized and reserved for future issuance	11,449,958