Quarterly report pursuant to Section 13 or 15(d)

Summary of Property, Plant, and Equipment (Detail)

v3.19.1
Summary of Property, Plant, and Equipment (Detail) - USD ($)
$ in Thousands
Mar. 31, 2019
Dec. 31, 2018
Property Plant And Equipment [Line Items]    
Property, plant, and equipment gross, excluding land $ 10,170 $ 10,153
Accumulated depreciation and amortization (8,599) (8,344)
Property, plant, and equipment net, excluding land 1,571 1,809
Land 162 166
Property, plant, and equipment, net 1,733 1,975
Building    
Property Plant And Equipment [Line Items]    
Property, plant, and equipment gross, excluding land 209 213
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 7,291 7,277
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 $ 32 $ 25