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Employee Benefit Plan	12 Months Ended
Employee Benefit Plan	Dec. 31, 2016
Compensation and Retirement Disclosure [Abstract]
Employee Benefit Plan	12. 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 $0.8 million, $0.5 million and $0.2 million during the years ended December 31, 2016, 2015 and 2014, respectively.