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Inventories
 3 Months Ended
Mar. 31, 2024
Inventories [Abstract]  
Inventories
4. Inventories

The components of inventories were:

 
March 31, 2024
    
December 31, 2023
  
   
(In thousands)
  
             
Raw materials and purchased component parts
  
$
10,644
    
$
9,382
  
Finished goods
    
8,527
      
8,377
  
   
$
19,171
    
$
17,759