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Inventories, Net (Tables)
12 Months Ended
Dec. 31, 2020
Inventory Disclosure [Abstract]  
Schedule of Inventories, Net

 

 

 

December 31,

 

 

 

2019

 

 

2020

 

 

 

(In thousands)

 

Raw materials

 

$

2,941

 

 

$

3,220

 

Work in process

 

 

11,771

 

 

 

11,668

 

Finished products

 

 

3,636

 

 

 

3,449

 

Total

 

$

18,348

 

 

$

18,337