Leases - Additional Information (Detail) $ in Thousands		6 Months Ended
	Nov. 11, 2019 USD ($)	Jun. 30, 2023 USD ($) ft² m²	Dec. 31, 2022 USD ($)
Lessee, Lease, Description [Line Items]
Operating lease, liability		$ 4,272
Right-of-use assets		$ 6,452	$ 7,229
Waltham Lease
Lessee, Lease, Description [Line Items]
Current office space under lease agreement | ft²		6,000
Current base rent		$ 300
Lease, term of contract (years)		5 years
Vienna Lease
Lessee, Lease, Description [Line Items]
Office space | m²		1,200
Lease not yet commenced, term of contract		7 years
Annual base rent		$ 285
Allston Lease
Lessee, Lease, Description [Line Items]
Lease not yet commenced	$ 1,100