Equipment and Improvements - Summary of Equipment and Improvements (Detail) - USD ($) $ in Thousands	Dec. 31, 2024	Dec. 31, 2023
Property, Plant and Equipment [Line Items]
Equipment and improvements, gross	$ 8,874	$ 8,896
Less accumulated depreciation and amortization	(8,336)	(8,013)
Equipment and improvements, net	538	883
Computer hardware, software, and equipment
Property, Plant and Equipment [Line Items]
Equipment and improvements, gross	6,624	6,653
Leasehold improvements
Property, Plant and Equipment [Line Items]
Equipment and improvements, gross	1,440	1,440
Office furniture and fixtures
Property, Plant and Equipment [Line Items]
Equipment and improvements, gross	$ 810	$ 803

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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