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Inventories - Schedule of Inventory (Detail) - USD ($)
$ in Thousands
Dec. 31, 2015
Dec. 31, 2014
Inventory Disclosure [Abstract]    
Finished goods $ 2,704 $ 358
Raw materials 1,928  
Reserve for excess and obsolete inventory   $ (358)
Total inventories 4,632  
Short-term portion 3,923  
Long-term portion 709  
Total inventories $ 4,632