401(k) Plan

12 Months Ended

Dec. 31, 2016

401(k) Plan

17. 401(k) Plan

The Company maintains a 401(k) defined contribution plan that covers all eligible U.S. employees. Under this plan, the Company matches 100% of the first 6% contributed by an employee. Vesting on contributions made by the Company is immediate. Total expenses for the plan were $1.9 million, $2.0 million, and $1.2 million for the years ended December 31, 2016, 2015, and 2014, respectively.