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Inventories
 9 Months Ended
Sep. 30, 2017
Inventories  
Inventories

 

4. Inventories

 

Inventories consist of the following, in thousands:

 

 

 

September 30,

 

December 31,

 

 

 

2017

 

2016

 

 

 

(unaudited)

 

 

 

Raw materials

 

$
2,178

 

$
2,091

 

Work in process

 
4,690

 
8,874

 

Finished goods

 
8,079

 
5,836

 

 

 

 

 

 

 

 

 

$
14,947

 

$
16,801