Leases - Additional Information (Detail) $ in Thousands		9 Months Ended
	Nov. 11, 2019 USD ($)	Sep. 30, 2024 USD ($) m²	Dec. 31, 2023 USD ($)
Lessee, Lease, Description [Line Items]
Operating lease, liability		$ 2,979
Right-of-use assets		$ 4,471	$ 5,650
Vienna Lease
Lessee, Lease, Description [Line Items]
Office space | m²		1,200
Lease not yet commenced, term of contract		7 years
Annual base rent		$ 282
Allston Lease
Lessee, Lease, Description [Line Items]
Lease not yet commenced	$ 1,100