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Inventories (Tables)
12 Months Ended
Dec. 31, 2017
Inventories  
Components of inventories

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

 

 

 

 

 

 

 

 

 

 

December 31, 

 

December 31, 

 

 

    

2017

    

2016

 

Inventories:

 

 

 

 

 

 

 

Raw materials

 

$

23,554

 

$

17,485

 

Work in process

 

 

20,135

 

 

20,410

 

Finished goods

 

 

2,151

 

 

2,257

 

 

 

$

45,840

 

$

40,152