Collaboration Profit and Loss - Schedule of Collaboration Profit (Loss) (Detail) - USD ($) $ in Thousands		3 Months Ended
		Mar. 31, 2024	Mar. 31, 2023
Business Combinations [Abstract]
Share of VOWST net loss		$ 7,128	$ 0
Profit on transfer of VOWST inventory to Nestle		(4,710)	0
Collaboration (profit)/loss related to pre-launch activities	[1]	0	3,607
Collaboration (profit) loss sharing - related party		$ 2,418	$ 3,607

[1] Includes non-cash collaboration profits and losses related to pre-launch activities; subsequent to the approval of VOWST in April 2023, collaboration (profit) loss sharing - related party is included within changes in operating assets and liabilities