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Property, Plants, and Equipment, Net
 3 Months Ended
Mar. 31, 2019
Property, Plant and Equipment [Abstract]  
Properties, Plants, and Equipment, Net
Properties, Plants, and Equipment, Net
 
March 31, 2019
 
December 31, 2018
Land and land rights
$
137

 
$
136

Structures
2,357

 
2,364

Machinery and equipment:
9,267

 
9,234

 
11,761

 
11,734

Less: accumulated depreciation and amortization
6,811

 
6,769

 
4,950

 
4,965

Construction work-in-progress
777

 
739

 
$
5,727

 
$
5,704