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Inventories (Tables)
 12 Months Ended
Dec. 31, 2017
Inventory Disclosure [Abstract]  
Schedule of Inventory

The components of inventories are as follows:

 

 

 

December 31,

 

 

December 31,

 

 

 

2017

 

 

2016

 

 

 

(In thousands)

 

Finished goods

 

$

4,432

 

 

$

4,698

 

Raw materials

 

 

6,385

 

 

 

3,185

 

Total inventories

 

$

10,817

 

 

$

7,883