Annual report pursuant to Section 13 and 15(d)

Summary of Property, Plant, and Equipment (Detail)

v3.21.1
Summary of Property, Plant, and Equipment (Detail) - USD ($)
$ in Thousands
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Property Plant And Equipment [Line Items]      
Total property, plant, and equipment before depreciation and land $ 8,269 $ 10,353  
Less: accumulated depreciation (7,664) (9,322)  
Total property, plant, and equipment, net before land 605 1,031  
Land 177 162  
Property, plant, and equipment, net 782 1,193 $ 1,975
Building      
Property Plant And Equipment [Line Items]      
Total property, plant, and equipment before depreciation and land 229 209  
Leasehold Improvements      
Property Plant And Equipment [Line Items]      
Total property, plant, and equipment before depreciation and land 52 2,004  
Equipment and Computers      
Property Plant And Equipment [Line Items]      
Total property, plant, and equipment before depreciation and land 7,477 7,479  
Furniture and Fixtures      
Property Plant And Equipment [Line Items]      
Total property, plant, and equipment before depreciation and land 465 634  
Construction in Progress      
Property Plant And Equipment [Line Items]      
Total property, plant, and equipment before depreciation and land $ 46 $ 27