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Revenue From Contracts With Customers (Details 1) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2018
Jun. 30, 2018
Revenue From Contracts With Customers [Abstract]    
Products and services transferred at a point in time $ 4,930 $ 9,591
Products and services transferred over time 4,872 9,497
Total revenue from contracts with customers $ 9,802 $ 19,088