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Inventories (Tables)
 6 Months Ended
Jun. 30, 2017
Inventories [Abstract]  
Components of inventory
The components of inventories, net are:

 
June 30,
2017
 
December 31,
2016
 
 
(In thousands)
 
 
    
Raw materials and purchased component parts
 
$
7,010
  
$
6,298
 
Work-in-process
  
7
   
8
 
Finished goods
  
2,504
   
3,401
 
 
 
$
9,521
  
$
9,707