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Employee Benefit Plan	12 Months Ended
Employee Benefit Plan	Dec. 31, 2014
Employee Benefit Plan
Employee Benefit Plan	15. Employee Benefit Plan The Company maintains a defined contribution 401(k) plan available to employees. Employee contributions are voluntary and are determined on an individual basis, limited by the maximum amounts allowable under federal tax regulations. The Company’s matching contributions to employees totaled approximately $0.2 million during the year ended December 31, 2014. The Company did not match any of the employee contributions during the years ended December 31, 2013 and 2012.