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2. Inventories
6 Months Ended
Jun. 30, 2017
Inventory Disclosure [Abstract]  
2. Inventories

Inventory consists of the following:

 

   

June 30,

2017  

   

December 31,

2016  

 
Raw materials   $ 4,189     $ 1,044  
Work-in-progress     1,451       1,360  
Finished goods     416       837  
Total inventories   $ 6,056     $ 3,241