Summary of Property, Plant, and Equipment (Detail) - USD ($) $ in Thousands	Sep. 30, 2022	Dec. 31, 2021
Property Plant And Equipment [Line Items]
Property, plant, and equipment gross, excluding land	$ 12,167	$ 8,952
Accumulated depreciation and amortization	(8,394)	(8,049)
Property, plant, and equipment, net before land	3,773	903
Land	142	164
Property, plant, and equipment, net	3,915	1,067
Building
Property Plant And Equipment [Line Items]
Property, plant, and equipment gross, excluding land	182	211
Leasehold Improvements
Property Plant And Equipment [Line Items]
Property, plant, and equipment gross, excluding land	328	89
Equipment and Computers
Property Plant And Equipment [Line Items]
Property, plant, and equipment gross, excluding land	8,452	8,150
Furniture and Fixtures
Property Plant And Equipment [Line Items]
Property, plant, and equipment gross, excluding land	475	471
Construction in Progress
Property Plant And Equipment [Line Items]
Property, plant, and equipment gross, excluding land	$ 2,730	$ 31