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401(k) Plan
12 Months Ended
Dec. 31, 2013
Compensation and Retirement Disclosure [Abstract]  
401(k) Plan
401(k) Plan
In January 2005, the Company implemented a 401(k) Plan covering certain employees. Currently, all of the Company's United States based employees over the age of 18 are eligible to participate in the 401(k) Plan. Under the 401(k) Plan, eligible employees may elect to reduce their current compensation up to a certain annual limit and contribute these amounts to the 401(k) Plan. The Company may make matching or other contributions to the 401(k) Plan on behalf of eligible employees. During the year end December 31, 2013, the Company recorded $488,000 in expense for matching contributions to the 401(k) Plan. In the years ended December 31, 2012 and 2011, the Company did not make any contributions to the 401(k) Plan on behalf of eligible employees.