Related Party Transactions (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023	Dec. 31, 2023
Collaboration and licensing agreements
Accounts due from related parties	$ 1,718		$ 2,765
Revenue from contract with customer	2,135	$ 6,165
Commercial supply revenue
Collaboration and licensing agreements
Revenue from contract with customer	640	3,191
Collaborative revenue
Collaboration and licensing agreements
Revenue from contract with customer	$ 788	2,750
Royalty revenue
Collaboration and licensing agreements
Revenue from contract with customer		125
Affiliated Entity | Vifor International Ltd.
Collaboration and licensing agreements
Shares owned as a result of upfront and milestone payments	7,396,770
Related party ownership percentage	13.50%
Affiliated Entity | CSL Vifor
Collaboration and licensing agreements
Accounts due from related parties	$ 1,718		$ 2,765
Affiliated Entity | CSL Vifor | Commercial supply revenue
Collaboration and licensing agreements
Revenue from related parties	640	3,191
Related party cost of goods sold	620	2,590
Affiliated Entity | CSL Vifor | Other Non-Cash Revenue
Collaboration and licensing agreements
Revenue from related parties	290	0
Affiliated Entity | CSL Vifor | CSL Vifor Profit Sharing | Collaborative revenue
Collaboration and licensing agreements
Revenue from contract with customer	788	2,750
Affiliated Entity | CSL Vifor | CSL Vifor Kapruvia | Royalty revenue
Collaboration and licensing agreements
Revenue from contract with customer	$ 0	$ 125