Capital Return Program (Details) - USD ($)					12 Months Ended
	Nov. 22, 2022	Nov. 21, 2022	Sep. 28, 2022	Sep. 20, 2022	Dec. 31, 2023	Dec. 31, 2022	Feb. 28, 2023	Sep. 30, 2022
Capital Return Program
Share repurchase authorized amount						$ 250,000,000.0	$ 325,000,000.0
Ordinary shares, par value (in dollars per share)					$ 0.00001	$ 0.00001
Ordinary shares, shares outstanding (in shares)					48,091,000	65,227,000
Consideration for repurchase					$ 197,051,000	$ 128,830,000
Aggregate cost					197,052,000	128,830,000
Net cash proceeds from sale of R&D laboratory equipment					$ 1,513,000	$ 1,866,000
GSK Share Repurchase
Capital Return Program
Share repurchase authorized amount								$ 250,000,000.0
Ordinary shares, par value (in dollars per share)				$ 0.00001
Ordinary shares, shares outstanding (in shares)				0
Shares authorized to be repurchased (in shares)				9,644,807
Repurchase price (in dollars per share)				$ 9.75
Consideration for repurchase				$ 94,000,000.0
Modified Dutch Auction Tender Offer
Capital Return Program
Share repurchase authorized amount			$ 95,000,000.0
Repurchase price (in dollars per share)	$ 10.50
Share repurchase (as a percent)		0.20%
Repurchase of ordinary shares (in shares)	115,967	115,967
Aggregate cost	$ 1,200,000
Modified Dutch Auction Tender Offer | Minimum
Capital Return Program
Repurchase price (in dollars per share)			$ 9.75
Modified Dutch Auction Tender Offer | Maximum
Capital Return Program
Repurchase price (in dollars per share)			$ 10.50