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401(k) Savings Plan	12 Months Ended
401(k) Savings Plan	Dec. 31, 2018
Retirement Benefits [Abstract]
401(k) Savings Plan	401(k) Savings Plan The Company has a defined-contribution savings plan under Section 401(k) of the IRC (the “401(k) Plan”). The 401(k) Plan covers all employees who meet defined minimum age and service requirements and allows participants to defer a portion of their annual compensation on a pretax basis. Beginning on January 1, 2018, the Company matches 50% of an employee’s 401(k) contributions up to a maximum of 6% of the participant’s salary, subject to employer match limitations under the IRC. As such, the Company made $0.5 million in contributions to the 401(k) Plan for the year ended December 31, 2018. The Company did not make any contributions to the 401(k) Plan for the year ended December 31, 2017.