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Investments - Additional Information (Details)
$ in Millions
1 Months Ended 3 Months Ended
Sep. 30, 2020
USD ($)
Jun. 30, 2021
USD ($)
Jun. 30, 2021
EUR (€)
Dec. 31, 2020
USD ($)
Sep. 30, 2019
USD ($)
May 31, 2014
EUR (€)
Synchronicity Pharma Inc | Investee | Other (Expense) Income, Net            
Investment Holdings [Line Items]            
Other-than-temporary impairment charge $ 1.0 $ 0.9        
Synchronicity Pharma Inc | Convertible Promissory Notes | Investee            
Investment Holdings [Line Items]            
Purchase of convertible promissory notes         $ 1.9  
Fountain Healthcare Partners II            
Investment Holdings [Line Items]            
Funding commitment as percentage of partnership's total funding   7.00% 7.00%      
Equity method commitment | €     € 7,200,000      
Fountain Healthcare Partners II | Other Assets            
Investment Holdings [Line Items]            
Carrying value of equity investment   $ 5.9   $ 6.2    
Fountain Healthcare Partners II | Maximum            
Investment Holdings [Line Items]            
Commitment on equity method investment | €           € 7,400,000