401(k) Savings Plan

12 Months Ended

Dec. 31, 2017

Compensation And Retirement Disclosure [Abstract]

401(k) Savings Plan

13. 401(k) Savings Plan

In March, 2008, the Company established a retirement savings plan under Section 401(k) of the Internal Revenue Code (the “401(k) Plan”). The 401(k) Plan covers substantially all employees of the Company who meet minimum age and service requirements, and allows participants to defer a portion of their annual compensation on a pretax basis. Company contributions to the 401(k) Plan may be made at the discretion of the board of directors. Company contributions to the 401(k) Plan were $190,000 and $237,000 for the years ended December 31, 2017 and 2016, respectively. No contributions were made during the year ended December 31, 2015.