Collaboration Profit and Loss - Schedule of Collaboration Profit (Loss) (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Business Combinations [Abstract]
Share of VOWST net loss	$ 2,141	$ 0	$ 2,141	$ 0
Profit on transfer of VOWST inventory to Nestle	(1,273)	0	(1,273)	0
Collaboration (profit)/loss related to pre-launch activities	1,238	271	4,845	(705)
Total collaboration (profit) loss sharing - related party	$ 2,106	$ 271	$ 5,713	$ (705)