Annual report pursuant to Section 13 and 15(d)

Summary of Property, Plant, and Equipment (Detail)

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Summary of Property, Plant, and Equipment (Detail) - USD ($)
$ in Thousands
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Property Plant And Equipment [Line Items]      
Property, plant, and equipment gross, excluding land $ 10,551 $ 9,883  
Accumulated depreciation (6,225) (6,314)  
Property, plant, and equipment net, excluding land 4,326 3,569  
Land 152 158  
Property, plant, and equipment, net 4,478 3,727 $ 1,295
Building      
Property Plant And Equipment [Line Items]      
Property, plant and equipment, gross 196 203  
Leasehold Improvements      
Property Plant And Equipment [Line Items]      
Property, plant and equipment, gross 2,003 2,019  
Equipment and Computers      
Property Plant And Equipment [Line Items]      
Property, plant and equipment, gross 6,163 6,031  
Furniture and Fixtures      
Property Plant And Equipment [Line Items]      
Property, plant and equipment, gross 599 585  
Construction in Progress      
Property Plant And Equipment [Line Items]      
Property, plant and equipment, gross $ 1,590 $ 1,045