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401(k) Savings Plan	12 Months Ended
401(k) Savings Plan	Dec. 31, 2016
Postemployment Benefits [Abstract]
401(k) Savings Plan	15. 401(k) Savings Plan The Company established a defined-contribution savings plan under Section 401(k) of the Code. 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. The amount of contributions that the Company made to the 401(k) Plan during the year ended December 31, 2016 and 2015 was $0.3 million and $0.1 million, respectively