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Acquisitions - Narrative (Details) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
May 29, 2020
Jun. 30, 2020
Jun. 30, 2020
Finite-Lived Intangible Assets [Line Items]      
Payments for asset acquisitions, share, value   $ 42,869 $ 42,869
Censa [Member]      
Finite-Lived Intangible Assets [Line Items]      
Payments for asset acquisitions $ 15,000    
Payments for asset acquisitions, upfront payment 10,400    
Payments for asset acquisitions, net assets $ 4,600    
Payments for asset acquisitions, shares (in shares) 845,364    
Payments for asset acquisitions, share, value $ 42,900    
Consideration for asset acquisitions $ 15,000    
Equity Interest Issued, number of shares (in shares) 42,900,000    
Asset acquisition, transaction costs $ 700    
Asset acquisition, consideration transferred 58,600    
Asset acquisition, cash 3,800    
Asset acquisition, other assets 800    
Asset acquisition, in-process research and development 54,000    
Asset acquisition, research and development expense 53,300    
Asset acquisition, selling, general And administrative expense 700    
Asset acquisition, milestone, amount 217,500    
Asset acquisition, development and regulatory milestones 109,000    
Asset acquisition, net sales milestone 160,000    
Asset acquisition, initial milestone 30,000    
Other Research and Development Expense $ 300