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Inventories (Tables)
9 Months Ended
Sep. 30, 2019
Inventory Disclosure [Abstract]  
Components of Inventory

Inventories consist of the following (in thousands):

 

 

 

September 30, 2019

 

 

December 31, 2018

 

Raw materials

 

$

986

 

 

$

1,337

 

Work-in-process

 

 

1,675

 

 

 

1,605

 

Finished goods

 

 

1,031

 

 

 

655

 

Total inventory

 

$

3,692

 

 

$

3,597