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Employee Benefit Plans	12 Months Ended
Employee Benefit Plans	Dec. 31, 2018
Retirement Benefits [Abstract]
Employee Benefit Plans	10. Employee Benefit Plans The Company sponsors a defined-contribution retirement plan under Section 401(k) of the Internal Revenue Code that covers substantially all employees. Participant contributions to the plan are voluntary and are subject to certain limitations. The Company may also make discretionary contributions to the plan. No contributions were made by the Company in 2018 or 2017.