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Inventories (Tables)
 9 Months Ended
Sep. 30, 2016
Inventories  
Components of inventories

The components of inventories are summarized below (in thousands):

 

 

 

 

 

 

 

 

 

 

 

September 30, 

 

December 31, 

 

 

    

2016

    

2015

 

Inventories:

 

 

 

 

 

 

 

Raw materials

 

$
19,355

 

$
19,532

 

Work in process

 

 
16,759

 

 
16,007

 

Finished goods

 

 
2,617

 

 
2,473

 

 

 

$
38,731

 

$
38,012