Related Party Transactions - Additional Information (Detail) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022	Dec. 31, 2022
Related Party Transaction [Line Items]
Research and development expense	$ 17,363,000	$ 11,162,000	$ 46,711,000	$ 34,099,000
Prepaid expenses	1,610,000		1,610,000		$ 2,723,000
Altasciences Company Inc [Member]
Related Party Transaction [Line Items]
Research and development expense	413,000	$ 237,000	1,300,000	$ 1,500,000
Accounts payable	$ 469,000		$ 469,000		$ 201,000
Other Liability, Related Party, Type [Extensible Enumeration]	Accounts Payable, Current		Accounts Payable, Current		Accounts Payable, Current
Prepaid expenses	$ 610,000		$ 610,000		$ 752,000