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2. Inventories
12 Months Ended
Dec. 31, 2018
Inventory Disclosure [Abstract]  
Inventories

Inventories consist of the following:

 

   

December 31,

2018

   

December 31,

2017

 
Raw materials   $ 3,647     $ 2,829  
Work-in-progress     1,327       1,605  
Finished goods     1,155       1,303  
Total inventories   $ 6,129     $ 5,737  

 

As of December 31, 2018 and December 31, 2017, the Company recognized a lower of cost or market reserve of $0.2 million each, respectively, related to inventory.