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

 

 

 

December 31,

 

 

 

2017

 

 

2016

 

 

 

(in thousands)

 

Raw materials

 

$

1,526

 

 

$

1,408

 

Work in process

 

 

1,337

 

 

 

1,306

 

Finished goods

 

 

1,012

 

 

 

924

 

Total Inventories, net

 

$

3,875

 

 

$

3,638