Quarterly report pursuant to Section 13 or 15(d)

Summary of Property, Plant, and Equipment (Detail)

v3.21.2
Summary of Property, Plant, and Equipment (Detail) - USD ($)
$ in Thousands
Jun. 30, 2021
Dec. 31, 2020
Property Plant And Equipment [Line Items]    
Property, plant, and equipment gross, excluding land $ 8,573 $ 8,269
Accumulated depreciation and amortization (7,829) (7,664)
Property, plant, and equipment, net before land 744 605
Land 172 177
Property, plant, and equipment, net 916 782
Building    
Property Plant And Equipment [Line Items]    
Property, plant, and equipment gross, excluding land 221 229
Leasehold Improvements    
Property Plant And Equipment [Line Items]    
Property, plant, and equipment gross, excluding land 78 52
Equipment and Computers    
Property Plant And Equipment [Line Items]    
Property, plant, and equipment gross, excluding land 7,585 7,477
Furniture and Fixtures    
Property Plant And Equipment [Line Items]    
Property, plant, and equipment gross, excluding land 465 465
Construction in Progress    
Property Plant And Equipment [Line Items]    
Property, plant, and equipment gross, excluding land $ 224 $ 46