Quarterly report pursuant to Section 13 or 15(d)

Summary of Property, Plant, and Equipment (Detail)

v3.20.1
Summary of Property, Plant, and Equipment (Detail) - USD ($)
$ in Thousands
Mar. 31, 2020
Dec. 31, 2019
Property Plant And Equipment [Line Items]    
Property, plant, and equipment gross, excluding land $ 10,354 $ 10,353
Accumulated depreciation and amortization (9,496) (9,322)
Property, plant, and equipment, net before land 858 1,031
Land 159 162
Property, plant, and equipment, net 1,017 1,193
Building    
Property Plant And Equipment [Line Items]    
Property, plant, and equipment gross, excluding land 205 209
Leasehold Improvements    
Property Plant And Equipment [Line Items]    
Property, plant, and equipment gross, excluding land 2,004 2,004
Equipment and Computers    
Property Plant And Equipment [Line Items]    
Property, plant, and equipment gross, excluding land 7,477 7,479
Furniture and Fixtures    
Property Plant And Equipment [Line Items]    
Property, plant, and equipment gross, excluding land 634 634
Construction in Progress    
Property Plant And Equipment [Line Items]    
Property, plant, and equipment gross, excluding land $ 34 $ 27