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Employee 401(K) Plan (Narrative) (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Employee 401(K) [Abstract]    
Description of 401(k) plan We have a 401(k) plan whereby eligible employees who have completed one hour of service per month in three consecutive months of employment may enroll.  
Maximum employee contribution percentage, not to exceed the limit as defined in the Code 100.00%  
Employer matching contribution $ 0 $ 0