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Summary of significant accounting policies (Tables)
6 Months Ended
Jun. 30, 2018
Accounting Policies [Abstract]  
Schedule of Inventory
The following table summarizes the components of the Company’s inventory for the periods indicated:
 
 
June 30, 2018
 
December 31, 2017
Raw materials
 
$
727

 
$
452

Work in progress
 
4,712

 
3,912

Finished goods
 
8,413

 
6,390

Total inventory
 
$
13,852

 
$
10,754