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Property and Equipment, Net - Summary of Property and Equipment, Net (Detail) - USD ($) $ in Thousands	Sep. 30, 2024	Dec. 31, 2023	Dec. 31, 2022
Property Plant And Equipment [Line Items]
Property and equipment, gross	$ 1,907	$ 2,012	$ 2,066
Less accumulated depreciation and amortization	(1,852)	(1,942)	(1,888)
Property and equipment, net	55	70	178
Software and computer equipment [Member]
Property Plant And Equipment [Line Items]
Property and equipment, gross	291	349	383
Machinery and equipment [Member]
Property Plant And Equipment [Line Items]
Property and equipment, gross	0	34	10
Furniture and fixtures [Member]
Property Plant And Equipment [Line Items]
Property and equipment, gross	32	39	83
Leasehold improvements [Member]
Property Plant And Equipment [Line Items]
Property and equipment, gross	$ 1,584	$ 1,590	$ 1,590

X

- Definition

Amount of accumulated depreciation, depletion and amortization for physical assets used in the normal conduct of business to produce goods and services.

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Amount before accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures.

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