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Inventories (Tables)
12 Months Ended
Dec. 31, 2018
Inventory Disclosure [Abstract]  
Schedule of Inventory, Current [Table Text Block]

In thousands

2018

 

2017

Raw materials

$

1,178

$

1,204

Work-in-progress

626

704

Finished goods

 

397

 

 

256

Total inventory

$

2,201

 

$

2,164