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Inventories (Tables)
3 Months Ended
Mar. 31, 2020
Inventories  
Summary of inventories

March 31, 

December 31, 

    

2020

    

2019

Raw materials

$

1,702

$

1,538

Work-in-progress

 

3,857

 

4,619

Finished goods

 

94,742

 

107,214

$

100,301

$

113,371