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Inventories (Tables)
 12 Months Ended
Dec. 31, 2017
Inventory, Net [Abstract]  
Schedule of Inventory, Current [Table Text Block]
 
 
December 31,
2017
 
December 31,
2016
 
 
 
 
 
 
 
 
 
Finished goods
 
$
3,326
 
$
1,757
 
Work in process
 
 
891
 
 
562
 
Raw materials
 
 
2,210
 
 
2,299
 
 
 
 
 
 
 
 
 
 
 
$
6,427
 
$
4,618