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401(K) Plan	3 Months Ended
	Mar. 31, 2018
Compensation And Retirement Disclosure [Abstract]
401(K) Plan	12. 401(K) PLAN The Company sponsors a 401(k) defined contribution plan covering all U.S. employees under the Internal Revenue Code. Employee contributions are voluntary and are determined on an individual basis subject to the maximum allowable under federal tax regulations. On January 1, 2018, the Company began to make contributions to the employee plan. For the three months ended March 31, 2018, the Company incurred an expense of $0.1 million related to contributions into the plan.

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- Definition

The entire disclosure for pension and other postretirement benefits.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-URI http://asc.fasb.org/topic&trid=2235017

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