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Collaboration Agreements and Revenues - Summary of Product Revenue, Net (Detail) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2020
Jun. 30, 2019
Jun. 30, 2020
Jun. 30, 2019
Disaggregation Of Revenue [Line Items]        
Total revenue $ 42,888 $ 191,566 $ 67,288 $ 215,429
Non-key Account Hospital Listing Award [Member]        
Disaggregation Of Revenue [Line Items]        
Total revenue 2,600      
Contractual Sales Rebate [Member]        
Disaggregation Of Revenue [Line Items]        
Total revenue 1,400   1,700  
Product [Member]        
Disaggregation Of Revenue [Line Items]        
Gross revenue 19,833   25,205  
Total revenue 15,693 $ 0 20,648 $ 0
Product [Member] | Non-key Account Hospital Listing Award [Member]        
Disaggregation Of Revenue [Line Items]        
Total revenue (2,566)   (2,566)  
Product [Member] | Contractual Sales Rebate [Member]        
Disaggregation Of Revenue [Line Items]        
Total revenue (1,372)   (1,748)  
Product [Member] | Other Discounts and Rebates [Member]        
Disaggregation Of Revenue [Line Items]        
Total revenue $ (202)   $ (243)