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Related Party Transactions (Detail) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2023
Mar. 31, 2022
Dec. 31, 2022
Related Party Transaction [Line Items]      
Accounts due from related parties $ 6,066   $ 3,260
Revenue from contract with customer 6,165 $ 4,790  
Commercial Supply Revenue      
Related Party Transaction [Line Items]      
Revenue from contract with customer 3,191 4,790  
Collaborative Revenue      
Related Party Transaction [Line Items]      
Revenue from contract with customer 2,750    
Royalty Revenue      
Related Party Transaction [Line Items]      
Revenue from contract with customer 125    
CSL Vifor Profit Sharing [Member] | Collaborative Revenue      
Related Party Transaction [Line Items]      
Revenue from contract with customer 2,750    
CSL Vifor Kapruvia [Member] | Royalty Revenue      
Related Party Transaction [Line Items]      
Revenue from contract with customer $ 125    
Vifor International Ltd. [Member]      
Related Party Transaction [Line Items]      
Shares owned as a result of upfront and milestone payments 7,396,770    
Related party ownership percentage 13.70%    
CSL Vifor [Member]      
Related Party Transaction [Line Items]      
Accounts due from related parties $ 6,066   $ 3,260
CSL Vifor [Member] | Commercial Supply Revenue      
Related Party Transaction [Line Items]      
Revenue from related parties 3,191 4,790  
Related party cost of goods sold 2,590 $ 2,081  
CSL Vifor [Member] | CSL Vifor Profit Sharing [Member] | Collaborative Revenue      
Related Party Transaction [Line Items]      
Revenue from contract with customer 2,750    
CSL Vifor [Member] | CSL Vifor Kapruvia [Member] | Royalty Revenue      
Related Party Transaction [Line Items]      
Revenue from contract with customer $ 125