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Revenue Recognition (Disaggregation of Revenue) (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2021
Sep. 30, 2020
Sep. 30, 2021
Sep. 30, 2020
Disaggregation of Revenue [Line Items]        
Revenues $ 51,742 $ 32,295 $ 142,743 $ 105,294
Goods transferred at a point in time        
Disaggregation of Revenue [Line Items]        
Revenues 20,436 19,871 61,931 61,131
Services transferred over time        
Disaggregation of Revenue [Line Items]        
Revenues $ 31,306 $ 12,424 $ 80,812 $ 44,163