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Subsequent Events - Acquisitions (Details) - Subsequent Event - USD ($)
$ in Millions
Apr. 18, 2018
Apr. 06, 2018
Tec-Sem Group AG    
Subsequent Event [Line Items]    
Noncontrolling interest (as a percent)   7.00%
Tec-Sem Group AG    
Subsequent Event [Line Items]    
Ownership interest acquired (as a percent)   93.00%
Cash payment subject to working capital adjustments   $ 11.3
BioSpeciMan Corporation    
Subsequent Event [Line Items]    
Cash payment subject to working capital adjustments $ 4.8