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Inventories
6 Months Ended
Jun. 30, 2021
Inventories, net [Abstract]  
Inventories, net
4. Inventories

The components of inventories were:

 
June 30, 2021
   
December 31, 2020
 
   
(In thousands)
 
             
Raw materials and purchased component parts
 
$
5,373
   
$
5,467
 
Finished goods
   
3,361
     
5,819
 
   
$
8,734
   
$
11,286