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Inventory
12 Months Ended
Dec. 31, 2016
Inventory Disclosure [Abstract]  
Inventory
8. Inventory

Inventory consist of the following (in thousands):
 
 
December 31,
 
 
2016
 
2015
Raw materials and consumables
 
$
8,572

 
$
10,485

Work in process
 
850

 
1,289

Finished goods
 
226

 
346

 
 
$
9,648

 
$
12,120