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E. INVENTORIES
 12 Months Ended
Dec. 31, 2017
Inventory Disclosure [Abstract]  
INVENTORIES

NOTE E—INVENTORIES

 

At December 31, 2017 and 2016, inventories consisted of the following (in thousands):

 

 

 

 

 

 

 

 

 

 

 

As of December 31, 

 

 

 

2017

    

2016

 

Raw materials

 

$

26,648

 

$

21,518

 

Work in process and sub-assemblies

 

 

31,060

  

 

24,334

 

Finished goods

 

 

18,060

  

 

5,965

 

 

 

$

75,768

 

$

51,817

 

 

For the years ended December 31, 2017, 2016 and 2015, the lower of cost or market reserve adjustment expensed for inventory was $1.9 million, $3.7 million and $2.8 million, respectively. For the years December 21, 2017, 2016 and 2015, the direct inventory write-offs related to scrap and damaged inventories were $6.8 million, $5.0 million and $1.0 million, respectively.