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Business Combinations - Narrative (Details) - USD ($)
$ in Thousands
12 Months Ended
Apr. 12, 2017
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Acquired Finite-Lived Intangible Assets [Line Items]        
Consideration transferred, net of cash acquired   $ 0 $ 0 $ 4,446
InPharmics        
Acquired Finite-Lived Intangible Assets [Line Items]        
Consideration transferred, net of cash acquired $ 5,000      
Cash acquired 300      
Long-term liability for potential settlement of performance obligations 500      
Intangible assets $ 1,900