Annual report pursuant to Section 13 and 15(d)

Summary of Property, Plant, and Equipment (Detail)

v3.20.1
Summary of Property, Plant, and Equipment (Detail) - USD ($)
$ in Thousands
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Property Plant And Equipment [Line Items]      
Total property, plant, and equipment before depreciation and land $ 10,353 $ 10,153  
Less: accumulated depreciation (9,322) (8,344)  
Total property, plant, and equipment, net before land 1,031 1,809  
Land 162 166  
Property, plant, and equipment, net 1,193 1,975 $ 3,674
Building      
Property Plant And Equipment [Line Items]      
Total property, plant, and equipment before depreciation and land 209 213  
Leasehold Improvements      
Property Plant And Equipment [Line Items]      
Total property, plant, and equipment before depreciation and land 2,004 2,004  
Equipment and Computers      
Property Plant And Equipment [Line Items]      
Total property, plant, and equipment before depreciation and land 7,479 7,277  
Furniture and Fixtures      
Property Plant And Equipment [Line Items]      
Total property, plant, and equipment before depreciation and land 634 634  
Construction in Progress      
Property Plant And Equipment [Line Items]      
Total property, plant, and equipment before depreciation and land $ 27 $ 25