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401K Savings Plan
12 Months Ended
Dec. 31, 2012
401K Savings Plan [Abstract]  
401K Savings Plan
(14)
 401K Savings Plan
 
The Company established a 401(k) plan in January 1995 for certain eligible employees. Company contribution to this plan was entirely at the Company's discretion. On October 1, 2007, the Company enhanced the plan to cover all of its U.S. employees. Under the enhanced provisions of the plan, an employee may contribute up to the statutory limit of his or her salary into the plan. The Company matches employee contributions up to 4% of qualified compensation. The Company's contribution vests immediately.  Company contribution to the plan for the year ended December 31, 2012 was approximately $0.2 million and approximately $0.1 million for each of the years ended December 31, 2011 and 2010.