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Inventories (Tables)
 3 Months Ended
Mar. 31, 2018
Inventories  
Summary of inventories

 

 

 

 

 

 

 

 

 

 

March 31, 

 

December 31, 

 

 

    

2018

    

2017

 

Raw materials

 

$

1,378

 

$

1,532

 

Work-in-progress

 

 

4,012

 

 

3,590

 

Finished goods

 

 

64,143

 

 

59,328

 

 

 

$

69,533

 

$

64,450