Series A Preferred Prospect Venture Partners
May 2006  
   
Series B Preferred Prospect Venture Partners
February 2007 Ridgeback Capital
   
Debt Financing  Pinnacle Ventures
June 2007   
   

Series C Preferred
December 2007

The Keffi Group
Prospect Venture Partners
Ridgeback Capital
Apothecary Capital
Pinnacle Ventures