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Inventories (Tables)
6 Months Ended
Jun. 30, 2018
Inventory Disclosure [Abstract]  
Schedule of Inventory, Current [Table Text Block]

 

June 30

2018

 

December 31

2017

In thousands

 

Raw materials

$

988

 

$

1,204

Work-in-progress

 

585

   

704

Finished goods

 

565

 

 

256

Total Inventory

$

2,138

 

$

2,164