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Employee Benefit Plan	12 Months Ended
Employee Benefit Plan	Dec. 31, 2015
Employee Benefit Plan
Employee Benefit Plan	13. 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 $0.5 million and $0.2 million during the years ended December 31, 2015 and December 31, 2014, respectively. The Company did not match any of the employee contributions during the year ended December 31, 2013.