401(k) Plan
12 Months Ended
Dec. 31, 2013
Compensation And Retirement Disclosure [Abstract]  
401(k) Plan
12. 401(k) Plan

On January 1, 2007, the Company established a defined contribution savings plan under Section 401(k) of the Internal Revenue Code. The plan is available to all employees upon employment and allows participants to defer a portion of their annual compensation on a pre-tax basis. The Company may contribute to the plan at the discretion of the Board of Directors. The Company has not made any contributions to the plan through December 31, 2013