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Property and Equipment, net - Additional Information (Detail) - USD ($)
$ in Thousands
9 Months Ended 12 Months Ended
Sep. 30, 2024
Sep. 30, 2023
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Nov. 30, 2023
Property, Plant and Equipment [Line Items]            
Lease incentives           $ 1,755
Reimbursements of lease incentives     $ 808      
Depreciation and amortization expense $ 192 $ 177 259 $ 248 $ 248  
Realized gain on sale of property and equipment     0 $ 0 70  
Laboratory Equipment [Member]            
Property, Plant and Equipment [Line Items]            
Realized gain on sale of property and equipment         $ 70  
New Stamford Lease [Member]            
Property, Plant and Equipment [Line Items]            
Leasehold improvements in process     $ 2,533