Subsequent Events

9 Months Ended

Sep. 30, 2014

Subsequent Events

Subsequent Events

13. Subsequent Events

Purchases of Common Stock under the Company’s Governance Agreement and Common Stock Purchase Agreements with GSK

In November 2014, we entered into an agreement with GSK pursuant to which GSK agreed to purchase through an affiliate, in a private placement, 832,456 shares of our common stock for an aggregate purchase price of approximately $12.8 million, pursuant to its rights under our Amended and Restated Governance Agreement, dated as of June 4, 2004, as amended.