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Employee Benefit Plans
12 Months Ended
Dec. 31, 2019
Compensation And Retirement Disclosure [Abstract]  
Employee Benefit Plans

14. Employee Benefit Plans

The Company maintains a defined contribution savings plan for all eligible U.S. employees under Section 401(k) of the Code. Effective July 1, 2017, the Company implemented a matching policy, under which the Company matches 50% of an employee’s annual contributions to the 401(k) plan, up to a maximum of the lesser of (i) 6% of the employee’s base salary, bonus and commissions paid during the year or (ii) $5,000. Matching contributions are subject to vesting based on the employee’s start date and length of service. Employees can designate the investment of their 401(k) accounts into several mutual funds. The Company does not allow investment in its common stock through the 401(k) plan.

During the year ended December 31, 2017, the Company began matching employee 401(k) contributions up to a set limit. Total employer contributions were $2,708, $1,953, and $724 during the years ended December 31, 2019, 2018 and 2017, respectively.