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Inventory (Tables)
6 Months Ended
Jun. 30, 2019
Inventory Disclosure [Abstract]  
Schedule of Inventory
Inventory consisted of the following:
 
June 30,
2019
 
December 31, 2018
Raw materials
$
1,754

 
$
1,969

Work-in-process
1,424

 
2,344

Finished goods
1,082

 
2,819

Total inventory
$
4,260

 
$
7,132