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401(k) Plan	12 Months Ended
401(k) Plan	Dec. 31, 2017
Retirement Benefits [Abstract]
401(k) Plan	401(k) Plan We have adopted a retirement plan under Section 401(k) of the Internal Revenue Code. The 401(k) plan covers substantially all employees who meet minimum age and service requirements. Company contributions to the 401(k) plan for the years ended December 31, 2017 and 2016 were $69,000 and $82,000, respectively.