Commitments and Contingencies - Schedule of Other Information related to Stamford Lease and New Stamford Lease (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Commitments and Contingencies
Operating cash outflows relating to operating leases	$ 4,363	$ 500	$ 4,363	$ 1,489
ROU assets obtained in exchange for new operating lease liabilities		$ 6,779		$ 6,779
Remaining lease term - operating leases (years)	1 month	10 years 4 months 24 days	1 month	10 years 4 months 24 days
Discount rate - operating leases		12.40%		12.40%