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Inventories (Tables)
6 Months Ended
Jun. 30, 2020
Inventories [Abstract]  
Inventories
The components of inventories were:

 
June 30,
2020
   
December 31,
2019
 
   
(In thousands)
 
             
Raw materials and purchased component parts
 
$
8,391
   
$
7,724
 
Work-in-process
   
5
     
 
Finished goods
   
3,509
     
4,375
 
   
$
11,905
   
$
12,099