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Employee Benefit Plans	12 Months Ended
Employee Benefit Plans	Dec. 31, 2018
Retirement Benefits [Abstract]
Employee Benefit Plans	Employee Benefit Plans The Company maintains a retirement savings plan under section 401(k) of the Internal Revenue Code (the “Plan”) for certain eligible employees. Eligible employees electing to participate in the 401(k) plan may defer and contribute from 1% to 100% of their compensation on a pre‑tax basis, subject to statutory limits. The Company will match the employees’ contributions up to the first 4% of their compensation. The Company’s Plan expense amounted to $479,000, $432,000 and $405,000 for the years ended December 31, 2018, 2017 and 2016, respectively.