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Inventories
 6 Months Ended
Jun. 30, 2018
Inventories  
Inventories

3.   Inventories

Inventories consist of the following:

 

 

 

 

 

 

 

 

 

June 30, 

 

December 31, 

 

    

2018

    

2017

Raw materials

 

$

1,670

 

$

1,532

Work-in-progress

 

 

4,577

 

 

3,590

Finished goods

 

 

71,707

 

 

59,328

 

 

$

77,954

 

$

64,450