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2. Inventories
3 Months Ended
Mar. 31, 2017
Inventory Disclosure [Abstract]  
2. Inventories

Inventories consist of the following:

 

   

March 31,

2017  

   

December 31,

2016  

 
Raw materials   $ 979     $ 1,044  
Work-in-progress     1,405       1,360  
Finished goods     400       837  
Total inventories   $ 2,784     $ 3,241