Retirement Plan |
12 Months Ended |
|---|---|
Dec. 31, 2017 | |
| Retirement Plan | |
| Retirement Plan | 14. Retirement Plan The Company has established a 401(k) plan for eligible employees to contribute up to 100% of their compensation, limited by the IRS-imposed maximum contribution amount. The Company matches 33% of each employee's contribution up to 6% of the employee's salary deferral. For the years ended December 31, 2017, 2016 and 2015, the Company made employer contributions of $1.3 million, $1.1 million and $0.8 million, respectively. |