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The Company and Summary of Significant Accounting Policies - Concentrations of Risk Narrative (Details) - USD ($)
9 Months Ended 12 Months Ended
Sep. 30, 2021
Dec. 31, 2020
Customer concentration risk | Gross accounts receivable | Three Customers    
Concentration Risk [Line Items]    
Percentage of gross accounts receivable (as a percent) 77.00% 84.00%
Customer concentration risk | Gross accounts receivable | ESSDS    
Concentration Risk [Line Items]    
Percentage of gross accounts receivable (as a percent) 57.00% 68.00%
Customer concentration risk | Gross accounts receivable | McKesson    
Concentration Risk [Line Items]    
Percentage of gross accounts receivable (as a percent) 11.00% 12.00%
Customer concentration risk | Gross accounts receivable | Cardinal    
Concentration Risk [Line Items]    
Percentage of gross accounts receivable (as a percent) 9.00% 4.00%
Foreign exchange forward contracts | Derivatives not designated as hedging instruments    
Concentration Risk [Line Items]    
Notional amount $ 407,700,000 $ 357,400,000
Net liability fair value 9,300,000  
Cross-currency interest rate contracts | Derivatives designated as hedging instruments    
Concentration Risk [Line Items]    
Notional amount 502,000,000  
Net liability fair value $ 20,000,000