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Defined Contribution Plan
12 Months Ended
Dec. 31, 2016
Compensation and Retirement Disclosure [Abstract]  
Defined Contribution Plan
DEFINED CONTRIBUTION PLAN
We have a retirement savings plan available for all our U.S. employees who have met minimum length-of-service requirements. Our contributions are determined based upon amounts contributed by the employees with additional contributions made at the discretion of the Board of Directors. Costs related to this plan were $376, $433 and $464 in 2016. 2015 and 2014, respectively.