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Inventories (Tables)
 3 Months Ended
Mar. 31, 2020
Inventory Disclosure [Abstract]  
Inventories

Inventories at March 31, 2020 and December 31, 2019 consisted of the following:

 

 

 

March 31,

2020

 

 

December 31,

2019

 

 

 

(In thousands)

 

Raw materials and supplies

 

$

7,549

 

 

$

6,957

 

Finished units

 

 

1,991

 

 

 

2,560

 

Inventories

 

$

9,540

 

 

$

9,517