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

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March 31, 

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December 31, 

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2020

    

2019

Raw materials

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$

1,702

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$

1,538

Work-in-progress

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3,857

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4,619

Finished goods

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94,742

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107,214

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$

100,301

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$

113,371