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Revenue by Geographic Area (Details) - USD ($)
$ in Millions
3 Months Ended 12 Months Ended
Dec. 31, 2021
Dec. 31, 2021
Dec. 31, 2020
Revenue   $ 298.3 $ 247.2
United States      
Revenue   220.5 171.7
Belgium      
Revenue $ 36.6   35.8
Japan      
Revenue   34.6 23.4
Other Foreign      
Revenue   6.6 16.3
Foreign [Member]      
Revenue   $ 77.8 $ 75.5